[AK9750]

AK9750IR Sensor IC with I2C I/F
1. General Description
The AK9750 is an ultra-low power and compact infrared-ray (IR) sensor module. It is composed of four
quantum IR sensors and an integrated circuit (IC) for characteristic compensation. The four IR sensors’
offset and gain variations are calibrated at shipment. An integral analog-to-digital converter provides
16-bits data outputs. Additional integrated features include a field of view limiter and an optical filter. The
AK9750 is suitable for applications including stationary human detection.

2. Features
 Quantum-type IR Sensor with Four IR Elements
 16-bits Digital Outputs to I2C bus
 Integrated temperature sensor:-10 ~ 60ºC output on I2C bus

 Interrupt Function
INT pin can be used as a read-trigger or an interrupt request of signal level monitoring.
 Built in Switch Mode (Standalone Mode)By writing the threshold into the internal EEPROM at the customer’s production testing, thepresence detection state will be output to the INT pin. In this mode, neither the control by I2C bus
nor Host MCU is necessary.
 Low Voltage Operation:

VDD:
1.71 ~ 3.63V
DVDD: 1.65V ~ VDD

 Low Current Consumption:

Max. 100 µA (@Continuous Mode “0”)Max. 1µA (@ Power down Mode) Small and Thin Package:

10-pin SON
Built in a field of view limiter and an optical filter

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3.

Table of Contents

1.
2.
3.
4.

General Description ............................................................................................................................ 1
Features .............................................................................................................................................. 1
Table of Contents ................................................................................................................................ 2
Block Diagram and Functions ............................................................................................................. 4
4.1. Block Diagram.............................................................................................................................. 4
4.2. Block Functions............................................................................................................................ 4
5. Pin Configurations and Functions ....................................................................................................... 5
5.1. Pin Configurations ....................................................................................................................... 55.2. Pin Functions ............................................................................................................................... 5
6. IR Sensors Configuration / Observable Area ...................................................................................... 6
6.1. IR Sensor’s Configurations .......................................................................................................... 6
6.2. IR Sensor’s Observable Area ...................................................................................................... 6
7. Absolute Maximum Ratings ................................................................................................................ 7
8. Recommended Operating Conditions................................................................................................. 7
9. Power Supply Conditions .................................................................................................................... 8
10.
Electrical Characteristics ................................................................................................................. 9
10.1.
Analog Characteristics ............................................................................................................. 9
10.2.
Digital Characteristics ............................................................................................................ 1010.2.1.
EEPROM......................................................................................................................... 1010.2.2.
DC Characteristics .......................................................................................................... 1010.2.3.
AC Characteristics (1): Standard Mode (100 kHz) ..........................................................11
10.2.4.
AC Characteristics (2): Fast Mode (400 kHz)..................................................................11
11.
Functional Descriptions ................................................................................................................. 13
11.1 Power Supply States ................................................................................................................. 13
11.2 Reset functions .......................................................................................................................... 13
11.3 Operating Mode ......................................................................................................................... 14
11.3.1. Normal Mode/Switch Mode ................................................................................................ 14
11.3.2. Normal Mode ...................................................................................................................... 15
11.3.3. Switch Mode ....................................................................................................................... 16
11.4 Descriptions for each Operating Mode ...................................................................................... 17
11.4.1. Power down Mode (PDN pin= “L”) ..................................................................................... 17
11.4.2. Stand-by Mode (EMODE [2:0] = “000”) .............................................................................. 17
11.4.3. EEPROM Access Mode (EMODE [2:0] = “001” and EEPMODE= “1”) .............................. 17
11.4.4. Single Shot Mode (EMODE [2:0] = “010”).......................................................................... 17
11.4.5. Continuous Mode 0 (EMODE [2:0] = “100”) ....................................................................... 18
11.4.6. Continuous Mode 1,2,3 (EMODE [2:0] = “101”, “110”, “111”) ............................................ 18
11.5 Read Measurement Data........................................................................................................... 19
11.5.1. Normal Read-out Procedure .............................................................................................. 19
11.5.2. Read-out Data within a measurement Period .................................................................... 20
11.5.3. Skipping Data ..................................................................................................................... 20
11.5.4. End Operation .................................................................................................................... 21
11.5.5. Example of Read-out Procedure ........................................................................................ 21
12.
Serial Interface .............................................................................................................................. 23
12.1.
Data Transfer.......................................................................................................................... 23
12.1.1.
Changing state of the SDA line ....................................................................................... 23
12.1.2.
Start / Stop Conditions .................................................................................................... 23
12.1.3.
Acknowledge................................................................................................................... 24
12.1.4.
Slave Address ................................................................................................................. 25
12.1.5.
WRITE Command ........................................................................................................... 26
12.1.6.
READ Command ............................................................................................................ 27
12.1.7.
EEPROM Write Timing ................................................................................................... 28
13.
Memory Map.................................................................................................................................. 29
14.
Registers Functional Descriptions................................................................................................. 31
15.
EEPROM Functional Descriptions ................................................................................................ 40015002896-E-01

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16.
First data Determination Time ....................................................................................................... 41
17.
Data Sampling Period ................................................................................................................... 41
18.
Sensor’s Output (Reference) ........................................................................................................ 42
19.
Spectrum Sensitivity (Reference).................................................................................................. 42
20.
Field of View (Reference) .............................................................................................................. 43
21.
Recommended External Circuits................................................................................................... 44
22.
Package ......................................................................................................................................... 45
22.1.
Outline Dimensions ................................................................................................................ 45
22.2.
Pad Dimensions ..................................................................................................................... 46
22.3.
Marking................................................................................................................................... 47
23.
Ordering Guide .............................................................................................................................. 48
24.
Revision History............................................................................................................................. 48
IMPORTANT NOTICE .......................................................................................................................... 49015002896-E-01

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4.

Block Diagram and Functions

4.1. Block Diagram

Figure 4.1 AK9750 Block Diagram

4.2. Block Functions
Table 4.1. Block Functions
Block
4 x IR
MUX
TIA
AMP
Temperature Sensor
ADC
I2C Interface
EEPROMOSC
POR

Function
Four IR Sensor
Matrix Switch
Photocurrents of IR Sensor are converted to voltage signals.
Programmable gain amplifier to adjust the outputs.
Built-in Temperature Sensor
The amplifier output and the built-in temperature sensor output areconverted to digital signals.
Interface to external host controller.
SCL and SDA pins are provided for I2C Interface. The interface operates up
to 400kHz rate and down to 1.65V low voltage condition.
EEPROM
Internal Oscillator.
Power On Reset circuit.

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5.

Pin Configurations and Functions

5.1. Pin Configurations

VDD

1

10

VSS

CAD0

2

9

TEST

CAD1

3

8

DVDD

INT

4

7

SCL

PDN

5

6

SDA

Top View
Figure 5.1 Pin Configurations

5.2. Pin Functions
Table 5.1 Pin Functions
Pin
No.
1

Name

I/O

Function

VDD

-

2

CAD0

I

3

CAD1

I

4

INT

O

5

PDN

I

6

SDA

I/O

7

SCL

I

8
9
10

DVDD
TEST
VSS

I
-

Analog Power Supply Pin
Slave address 0. CAD0 pin should be connected to VDD or VSS. Set up an address sothat two or more same address of devices do not exist on the same bus.
Slave address 1. CAD0 pin should be connected to VDD or VSS. Set up an address sothat two or more same address of devices do not exist on the same bus.
Functions are selected by INTEN register. INT pin goes “Active”, when the ADC output
are ready to be read or the differential signal of two IR sensor(one observes the upper(or left)side and another observes lower (or right) side) exceeds threshold levels. It is
composed of an open drain output (N-type transistor). INT pin is connected to DVDD
voltage through a pull-up resister, with other open drain or open collector output of theother devices to form “wired-OR”.
Power down pin. When PDN pin= “H”, AK9750 can operate. PDN pin is not connected
to VDD (or VSS) through a pull-up (or pull-down) resister. This pin must be connected
to “H” or “L” voltage level.
I2C Data Output Pin. SDA is a bidirectional pin which is used to transmit data into andout of the device. It is composed of a signal input and an open drain output (N-typetransistor). SDA is connected to DVDD voltage through a pull-up resistor, and to open
drain outputs or open collector outputs of the other devices as “wired-OR”
I2C Clock Input pin. Signal processing is executed at the rising and falling edge of SCL
clock. Observe rise time tR and fall time tF. SCL is connected to DVDD voltage througha pull-up resistor.
Digital I/F Power Supply pin.
Test pin. TEST pin should be connected to VSS.
Ground pin.

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6. IR Sensors Configuration / Observable Area
6.1. IR Sensor’s Configurations
The four IR sensors which AK9750 includes are arranged as shown in Figure 6.1 IR1(2, 3, 4) is definedas the measurement data of IR sensor 1(2, 3, 4).
The upper (left, lower, right) side is defined as the side on which IR sensor 1(2, 3, 4) is arranged.

Figure 6.1. IR Sensor’s Configurations

6.2. IR Sensor’s Observable Area
The each IR sensor’s Observable Area is limited by the field of view limiter as shown Figure 6.2.
Area1 (2, 3, 4) is defined as the area which IR Sensor 1(2, 3, 4) can observe. Each sensor detects the
diagonal area.

Figure 6.2. IR Sensor’s Observable Area

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7. Absolute Maximum Ratings(VSS= 0V)
Parameter
Power Supply
Input Current
Input Voltage(* 1)

VDD pin, DVDD pin
All pins
CAD0 pin, CAD1 pin, INT pin,
PDN pin, TEST pin, SCL pin,
SDA pin

Symbol
V+
Iin

Min.
-0.6
-10

Max.
4.6
10

Unit
V
mA

Vin

-0.6

4.6

V

Tst

-30

85

ºC

Storage Temperature
Note:* 1. Vin should be always lower than (V+) + (0.6V).

WARNING: Operation at or beyond these limits may result in permanent damage to the device.
Normal operation is not guaranteed at these extremes.

8. Recommended Operating Conditions(VSS= 0V)
Parameter
SymbolVDDPower Supply During normal operation(* 2)
During the EEPROM write
EVDD
Digital Power Supply
DVDD
Operating TemperatureTa
Notes:* 2. VDD should always be higher than DVDD.
* 3. Keep environment no dew condensation.

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Min.
1.71
3.00
1.65
-30

Typ.
3.3
3.3
3.3
25

Max.
3.63
3.63
VDD
85

Unit
V
V
V
ºC

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9. Power Supply Conditions(Unless otherwise specified, VDD=1.71 ~ 3.63V, DVDD= 1.65V ~ VDD, Ta= -30 ~ 85ºC)
Parameter
Symbol Min. Typ.
Power Supply Rise Time(* 4, * 5)Power-on Reset Time(* 4, * 5)
Shutdown Voltage(* 5, * 6)Power Supply Interval Time(* 4, * 5, * 6)

Time until VDD, DVDD,
and PDN are set to theoperating voltage from
0.2V.
Time until AK9750
becomes Power down
Mode after PSUP.
Shutdown Voltage for
POR re-starting.
Voltage retention time
below SDV1 for POR
re-starting.

Max.

Unit

VDD pin,
DVDD pin

PSUP

50

ms

VDD pin

PORT

3000

µs

VDD pin,
DVDD pin

SDV

0.2

V

VDD pin,
DVDD pin

PSINT

3000

µs

Notes:* 4. Reference data only, not tested.
* 5. Power-on Reset circuit detects the rising edge of VDD, resets the internal circuit, and initializes theregisters. After Power-on reset, Stand-by Mode is selected.
* 6. The condition that POR surely works at the power-up the power-up again after power supply goes
down. Unless this condition is satisfied, the reset may not be correctly expected.

VDD/DVDD/PDN

PORT: 3000µs

Stand-by Mode

Stand-by Mode

SDV: 0.2V

0V
PSUP: 50ms

PSINT: 3000µs

Figure 9.1. Power Supply Conditions

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10. Electrical Characteristics
10.1. Analog Characteristics(Unless otherwise specified, VDD= 1.71 ~ 3.63V, DVDD= 1.65V ~ VDD, Ta= -30 ~ 85ºC)
SymbolMin.
Typ.
Parameter
16
IR output resolution
IR offset code
IR output code

All output currents of four IR sensors
are Zero.
・Reference data only, not tested.
・Ttgt= 50ºC, Ta= 23ºC ±3ºC・2’s complement

Relative sensitivity
Ta= 23ºC ±3ºC
variations of four IR sensors
Temperature output resolution
Temperature sensor range
Temperature sensor
accuracy (* 7)
Field of View

Averaged current
consumption

Digital filter cut-off
frequency

Max.

Unit
bit

-36

0

36

Code

2940H

2A1CH

2AF8H

Code

3.5

%

-3.5
10

・Linear to internal temperature（excludes noise）
・2’s complement

-10

60

ºC

B980H

4380H

Code

-5.5

5.5

ºC

±66

deg(º)

SIDD

1

µA

IDD0

10

µA

IDD1

100

µA

IDD2

60

µA

IDD3

38

µA

IDD4

25

µA

9.7

Hz

Ta= 35ºC
The combined range observed byUpper/Lower (Left/Right)
・Reference data only, not tested.
Power Down Mode
PDN= “L”
Stand-by Mode
PDN＝ “H”, EMODE [2:0] = “000”Continuous Mode 0
PDN＝ “H”, EMODE [2:0] = “100”Continuous Mode 1
PDN＝ “H”, EMODE [2:0] = “101”Continuous Mode 2
PDN＝ “H”, EMODE [2:0] = “110”Continuous Mode 3
PDN＝ “H”, EMODE [2:0] = “111”Eight levels can be selected by
setting register.
nTyp. Fc=8.8/2 （n=0 ~ 5）

bit

FOV

Fc

±48

0.2

±55

Note:
* 7. Temperature sensor’s output is as the following
Ta= 35ºC, (Temperature sensor’s output)= (VDD-1.71) × 1.45+33.5±4.0 [ºC]

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10.2. Digital Characteristics
10.2.1. EEPROM(Unless otherwise specified, VDD= 1.71 ~ 3.63V, DVDD= 1.65V ~ VDD, Ta= -30 ~ 85ºC)
Parameter
Symbol
Min.
Typ.
Max.
Retention Time
@Ta= 85ºC
Ehold
10
Endurance
1000
Note:
* 8. VDD (EVDD) should be greater than 3.0V, when writing EEPROM.

Unit
years
times

10.2.2. DC Characteristics(Unless otherwise specified, VDD= 1.71 ~ 3.63V, DVDD= 1.65V ~ VDD, Ta= -30 ~ 85ºC)
Parameter
Symbol
Min.
Typ.
Max.
High Level Input Voltage 1
PDN pin
VIH1
80%DVDD
Low Level Input Voltage 1
PDN pin
VIL1
20%DVDDSCL pin,High Level Input Voltage 2
VIH2
70%DVDD
SDA pin
SCL pin,
Low Level Input Voltage 2
VIL2
-0.5
30%DVDD
SDA pin
CAD1 pin,High Level Input Voltage 3
VIH3
80%VDDCAD0 pin
CAD1 pin,
Low Level Input Voltage 3
VIL3
20%VDDCAD0 pinHigh Level Input
DVDD
DVDD pin
VIH4
80%VDD
Voltage 4
Monitor
Function
Low Level Input
DVDD pin
VIL4
0.2
Voltage 4
DVDD ≥ 2V
5%DVDD
Hysteresis Voltage
SCL pin,VHS(* 9)
SDA pin
DVDD < 2V
10%DVDD
Low Level Output
IOL= 3mA
SDA pin,
VOL1
0.4
Voltage 1
DVDD ≥ 2V
INT pin
Low Level Output
IOL= 3mA
SDA pin,
VOL2
20%DVDD
Voltage 2
DVDD < 2V
INT pinNote:* 9. Reference data only, not tested.

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Unit
V
V
V
V
V
V
V
V
V
V
V
V

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10.2.3. AC Characteristics (1): Standard Mode (100 kHz)
(Unless otherwise specified, VDD= 1.71 ~ 3.63V, DVDD= 1.65V ~ VDD, Ta= -30 ~ 85ºC)
Parameter
Symbol
Min.
Typ.
Max.
SCL frequency
fSCL
100
SDA bus idle time to the next
fBUF
4.7
command input
Start condition Hold time
tHD:STA
4.0
Clock Low period
tLOW
4.7
Clock High period
tHIGH
4.0
Start condition set-up time
tSU:STA
4.7
Data hold time
tHD:DAT0
Data set-up time
tSU:DAT
250
Rise time
SDA pin,tR
1.0
SDA, SCL (* 10)
SCL pin
Fall time
SDA pin,tF
0.3
SDA, SCL (* 10)
SCL pin
Stop condition set-up time
tSU:STO
4.0
EEPROM write time
tWR
10
Note:
* 10. Reference data only, not tested.
10.2.4. AC Characteristics (2): Fast Mode (400 kHz)
(Unless otherwise specified, VDD= 1.71 ~ 3.63V, DVDD= 1.65V ~ VDD, Ta= -30 ~ 85ºC)
Parameter
Symbol
Min.
Typ.
Max.
SCL frequency
fSCL
400
SDA bus idle time to the next
fBUF
1.3
command input
Start condition Hold time
tHD:STA
0.6
Clock Low period
tLOW
1.3
Clock High period
tHIGH
0.6
Start condition set-up time
tSU:STA
0.6
Data hold time
tHD:DAT0
Data set-up time
tSU:DAT100
Rise time
SDA pin,tR
0.3
SDA, SCL (* 11)
SCL pin
Fall time
SDA pin,tF
0.3
SDA, SCL (* 11)
SCL pin
Stop condition set-up time
tSU:STO
0.6
EEPROM write time
tWR
10
Note:
* 11. Reference data only, not tested.

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Unit
kHz
µs
µs
µs
µs
µs
µs
ns
µs
µs
µs
ms

Unit
kHz
µs
µs
µs
µs
µs
µs
ns
µs
µs
µs
ms

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tHIGH

tF

tR

tLOW

SCL
tSU:STAtHD:DATtHD:STAtSU:DATtSU:STO

SDAIN
tDH

tBUF

SDA OUT
Figure 10.1. Bus Timing

SCL

SDA

8th bit

STOP

ACK

WORDn

START

tWR ≧ 10ms

Figure 10.2. EEPROM write time

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11. Functional Descriptions
11.1 Power Supply States
When VDD, DVDD and PDN turn on from the state of VDD= DVDD= OFF(0V), Power-on Reset(POR)
automatically operates, all registers will be initialized, and the AK9750 will be set to Stand-by Mode.
Although all states of the Following table can exist, the state 2 is prohibited.

State
1
2
3
4
5

VDD pinOFF(0V)
OFF(0V)
1.71 ~ 3.63V
1.71 ~ 3.63V
1.71 ~ 3.63V

6

1.71 ~ 3.63V

Table 11.1. Power Supply States and Functions
DVDD pin
PDN pin
I2C
INI pin
Analog Circuit
OFF(0V)“L”
DisableUnfixedPower Down
1.65 ~ 3.63V“H” or “L”
DisableUnfixedPower Down
OFF(0V)“L”
DisableUnfixedPower Down
OFF(0V)“H”
DisableUnfixedPower Down
1.65V ~ VDD“L”
Disable“H”
Power Down
POR circuit
1.65V ~ VDD“H”
Enable“H”
only operates

IDD
Unknown
Unknown
Unknown
Unknown< 1µA< 10µA

11.2 Reset functions
When VDD turns ON, set up DVDD lower than VDD(DVDD ≤ VDD).
Power-on Reset (POR) operates unit VDD reaches the operating voltage (1.4V Typ.). After POR, allregisters are set to initial values, and Stand-by Mode is selected.
AK9750 has five reset functions.
(1) Power-on Reset(POR)
Power-on Reset circuit resets AK9750 by detecting VDD and DVDD rising.
When VDD and DVDD turns ON with PDN pin= “L”, POR does not operate, because POR circuit isalso in PD state.
(2) Hardware Reset
AK9750 is reset by PDN pin= “L”(3) Software Reset
AK9750 is reset by setting SRST bit.
(4) DVDD Monitor Reset
When DVDD turns OFF (DVDD ≤ 0.2V), AK9750 is reset.
(5) Power Supply Reset
AK9750 is reset by VDD= 0V.
When AK9750 is reset, all registers are set to initial values.

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11.3 Operating Mode11.3.1. Normal Mode/Switch Mode
AK9750 has two Modes, Normal Mode and Switch Mode.
Normal Mode is the mode which controls AK9750 by using I2C interface. The digital output the four IR
sensors and the internal temperature sensor can be used through the I2C interface in Normal Mode.
INT output also can be used.
Switch Mode is the mode which uses only INT output without using I2C interface. When the differential
output of two sensors (IR1 - IR3 / IR2 - IR4) exceeds the upper / lower thresholds which are set to
EEPROM, INT output turns “active”. When the differential output of two sensors (IR1 - IR3 / IR2 - IR4) isin the range which is set to EEPROM, INT output is “non-active”. The hysteresis for the thresholds canbe set to EEPROM for avoiding the chattering of INT output. When Switch Mode is used, the threshold
and the hysteresis should be set to EEPROM beforehand. When the accuracy of HumanSensing is notcared, Switch Mode can be used.
Normal Mode / Switch Mode selection is controlled by the CAD1 pin and CAD2 pin.
When CAD1 pin and CAD0 pin are set as CAD1 pin= CAD0 pin= “H”, the digital output can be usedthrough the I2C interface.
When CAD1 pin and CAD0 pin are set as CAD1 pin= CAD0 pin= “H”, Switch Mode is selected. When
Switch Mode is selected, SCL pin and SDA pin should be tied to “H”. (Do not access the AK9750 throughthe I2C interface in Switch Mode.)

CAD1
0
0
1
1

Table 11.2. CAD0 / CAD1 pin Setting and Slave Address
CAD0
I2C output
Slave address0
Enable64H1Enable65H0Enable66H
1Disable(67H)

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Mode
Normal Mode
Normal Mode
Normal Mode
Switch Mode

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11.3.2. Normal Mode
There are the eight Modes in Normal Mode.
<Normal Mode (CAD0 pin= “L” or CAD1 pin= “L”)>(1) Power down Mode
(2) Stand-by Mode
(3) Single shot Mode
(4) Continuous Mode 0(5) Continuous Mode 1(6) Continuous Mode 2(7) Continuous Mode 3(8) EEPROM access Mode

Power down Mode:
The all circuits are powered down for saving the current consumption.
PDN= “H”

EMODE [2:0]= “010”
EMODE [2:0]= “000”Automatic shift

PDN= “L”

Single shot Mode:
The measurement is done, and Saving the data on theregister. Stand-by Mode is automatically selected after
reading data.

EMODE [2:0]= “100”Continuous Mode0:

EMODE [2:0]=“000”Measurement is automatically repeated.

Continuous Mode 1:
EMODE [2:0]= “101”EMODE [2:0]= “000”Measurement is automatically repeated in intermittent manner(Measurement time: Wait time= 1:1). The data updating period
is eight times longer than Continuous Mode 0.

EMODE [2:0]= “110”Continuous Mode 2:Stand-byMode
EMODE [2:0]= “000”Measurement is automatically repeated in intermittent manner(Measurement time: Wait time= 1:3). The data updating period
is twice longer than Continuous Mode 1.

EMODE [2:0]= “111”Continuous Mode 3:

EMODE [2:0]= “000”EEPMODE= “1” andEMODE [2:0]= “001”
EMODE [2:0]= “000”Measurement is automatically repeated in intermittent manner(Measurement time: Wait time= 1:7). The data updating period
is twice times longer than Continuous Mode 2.

EEPROM Access Mode:
EEPROM rea/write circuit is on . EEPROM can be accessed
only in this Mode.

Figure 11.1. Various Modes in normal Mode.

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On initial power-on with PDN pin= “H”, AK9750 is in Stand-by Mode. Based on EMODE [2:0] setup, theAK9750 shifts to the selected Mode, and starts operating. Any Mode changing should be done via
Stand-by Mode.
11.3.3. Switch Mode
There are two Modes in Switch Mode.
<Switch Mode (CAD0 pin= CAD1 pin= “H”)>(1) Power down Mode
(2) Measurement Mode

Power down Mode:
The all Circuits are powered down for decreasing the current consumption.

PDN= “H”

PDN= “L”

Measurement Mode:
Measurement is automatically repeated. The measurement is done in the conditions which are set to
the EEPROM beforehand.
The measurement conditions should be set to the EEPROM in the customer’s mass production line.

Figure 11.2. Various Modes in Switch Mode

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11.4 Descriptions for each Operating Mode
11.4.1. Power down Mode (PDN pin= “L”)
All circuits are powered off with PDN pin= “L”. The all functions of AK9750 do not work in this Mode.
11.4.2. Stand-by Mode (EMODE [2:0] = “000”)
All circuits are powered off except for POR circuit. All registers can be accessed in this Mode.
Read / Write register data are retained, and reset by software reset.
However, EEPROM data cannot be read / written in this Mode. Reading/Writing EEPROM data must be
done in EEPROM access Mode.
The data registers (ST1 to ST2) should not be accessed in Stand-by Mode. It causes the malfunction of
AK9750.
11.4.3. EEPROM Access Mode (EMODE [2:0] = “001” and EEPMODE= “1”)When EMODE [2:0] bits are changed from Stand-by Mode (EMODE [2:0] = “000”) to EMODE [2:0] =“100” and EEPROM bit is set as “1”, EEPROM Access Mode is selected. Reading / Writing EEPROM
data should be done in EEPROM Access Mode. When EKEY [7:0] bit is set as “A5H” in EEPROM
Access Mode, the data can be written to EEPROM.
Data measurement is not done in EEPROM Access Mode.
11.4.4. Single Shot Mode (EMODE [2:0] = “010”)
When AK9750 is set to Single shot Mode (EMODE [2:0] = “010”), measurement is done once, and the
Measurement data is stored to the measurement data registers (IR1L to TMPH). Then the analog circuits
except for POR circuit are automatically powered off. When the registers from ST1 to ST2 are read, theAK9750 automatically shifts to Stand-by Mode (EMODE [2:0] = “000”).
Change the register

Read the data

Change the register

EMODE[2:0]001000
Analog Circuit
Power down
Digital calculation

010

Power onPower down

4.5ms

Wait

000

010

Power onPower down

4.5ms
Measurement

Ready

010

000

Wait

Measurement(Depended on EFC[2:0])

Wait

Ready

Figure 11.3. Single shot Mode

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11.4.5. Continuous Mode 0 (EMODE [2:0] = “100”)
When Continuous Mode 0 (EMODE [2:0] = “100”) is selected the measurement is automatically repeatedat the cycle which is determined by the digital filter cut-off frequency (EFC [2:0]).
When a measurement have been done, the measurement data is stored to the measurement register(IR1L to TMPH), and new measurement is started.
This Mode is terminated by setting the AK9750 to Stand-by Mode (EODE [2:0] = “000”).
When EMODE [2:0] is re-written during a measurement, the measurement is interrupted. Then the last
data is retained to the register.
When Continuous Mode 0 is selected, a register write command should be executed. If register write
command should be executed during a measurement, a right measurement data cannot be gotten.
Change the register

Change the register
EMODE[2:0]
000

100

Analog circuit
Power down000

Power onPower down

4.5ms

Digital calculation
Wait

Measurement

Measurement

Ready

Measurement

Measurement

Wait

Measurement

When a command entersmeasurement is interrupted.

(Depended on EFC [2:0])

Last data is retained to the register.

Figure 11.4. Continuous Mode 0
11.4.6. Continuous Mode 1,2,3 (EMODE [2:0] = “101”, “110”, “111”)
When Continuous Mode 1, 2, and 3 (EMODE [2:0] = “101”, “110”, “111”) are selected, a measurement
and a wait are automatically repeated at the cycle according to the selected measurement Mode
(EMODE [2:0]) and the digital filter cut-off frequency (EFC [2:0]).
A wait time length depends on the measurement Mode. When a measurement has been done, themeasurement data is stored to the measurement register (IR1L to TMPH).
This Mode is terminated by setting the AK9750 to Stand-by Mode (EMODE [2:0] = “000”).
When EMODE [2:0] is re-written during a measurement, the measurement is interrupted. Then the last
data is retained to the register.
When Continuous Mode 1, 2, and 3 is selected, a register write command should be executed. If aregister write command should be executed during a measurement, a right measurement data cannot be
gotten.

Change the register

Change the register

EMODE [2:0]

000

000

101 or 110 or 111

Analog circuit
Power down

Power onPower down

Power onPower down

4.5ms

4.5ms

Power onPower down

4.5ms

Digital Calculation
Measurement

Wait

Measurement

Wait

Wait

Measurement

Wait

Measurement is interrupted.
Register retains the last data.

Ready
Ready

Ready

Figure 11.5. Continuous Mode 1, 2, and 3015002896-E-01

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11.5
Read Measurement Data
When a measurement data is stored to the measurement register, DRDY bit of ST1 register changes to“1”. This state is called “Data Ready”. It can be set up so that INT output “H”, when the DRDY bit is “1”,by setting up the interruption register.
The read-out procedure is detailed here. (Single shot Mode is used as an example.)
The same procedure can also be applied the Continuous Mode 0 (1, 2, and 3).
11.5.1. Normal Read-out Procedure(1) Read-out ST1 registers
DRDY: DRDY shows whether the state is “Data Ready” or not.
DRDY = “0” means “No Data Ready”.
DRDY = “1” means “Data Ready”.
It is recommended that measurement data is read-out with DRDY = “1”.
DOR: DOR shows whether there are any data which was not read out before initiating the current
read.
DOR= “0” means that there are no data which was not read out before initiating the current read.
DOR= “1” means that there are data which was not read out before initiating the current read.
(2) Reading measurement data
Once a data read is initiated from one of the measurement data registers (IR1L to TMP) or the ST2
register, the AK9750 recognizes that a data read-out has begun. When a data read-out is initiated,
DRDY and DOR change to “0”.
(3) Reading ST2 Resisters (Required Operation)
The AK9750 recognizes that a data read-out has finished out the ST2 registers. Because themeasurement data registers are protected while reading out, data is not updated. Data protection of
the measurement data registers is canceled by reading out the ST2 register. The ST2 register must
be read out after accessing the measurement data register.

(N-1)
PD

(N)
Measurement

Internal Bufferdata(N-1)(N+1)
MeasurementPDdata(N)

Measurement data registerdata(N-1)

PD

data(N+1)

data(N)data(N+1)

DRDY

Read-out data

ST1

data(N)

ST2

ST1

data(N+1)

ST2

Figure 11.6. Normal Read-out Procedure

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11.5.2. Read-out Data within a measurement Period
The measurement data register is retained within a measurement period, so the data can be read out
within the measurement period. When data is read out within the measurement period, the previous dataretained is read out.

(N-1)
PD

(N)
Measurement(N+1)
Measurement

PD

Internal Bufferdata(N-1)

data(N)

Measurement data registerdata(N-1)

PD

data(N+1)

data(N)data(N)

DRDY

Read-out data

ST1

data(N)

ST2

ST1

data(N)ST2

Figure 11.7. Read-out data within a measurement period

11.5.3. Skipping Data
When measurement data is not read out between the end points of (N+1)th and Nth measurement,
DRDY is held until the measurement data is read out. In this case, because the Nth data was skipped,
the DOR bit is “1”.

(N-1)
PD

(N)
Measurement

Internal Bufferdata(N-1)

PD

(N+1)
Measurement

data(N)PD

data(N+1)

Measurement data
data(N-1)

data(N+1)

DRDY

DOR

ST1 data(N+1)

Read-out data

ST2

Figure 11.8. Skipping Data

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When a data read begins after the end of the Nth measurement, and when data read cannot becompleted until the end of the (N+1)th measurement, the measurement data registers are protected toread data normally. In this case, because the(N+1)th data has been skipped, the DOR bit transitions to
“1”.

(N-1)
PD

(N)

(N+1)
PD

Measurement

Internal Bufferdata(N-1)

(N+2)
PD

Measurement

data(N)

Measurement

data(N+1)

Measurement data registerdata(N-1)

data(N+2)

data(N)
Data register is protectedduring read-out.
DRDY does not go to “1”because data is not updated.

DRDY

Data (N+1) is skipped.
DOR

Read-out data

ST1

data(N)

ST2

ST1

Figure 11.9. The data read cannot be completed until the beginning of the next measurement.
In both of these cases, the DOR bit changes to “0” from “1”, at the start of reading data if DRDY is “1”.

11.5.4. End Operation
Select Stand-by Mode (EMODE [2:0] = “000”) to complete the Continuous Mode 0 (1, 2, and 3).

11.5.5. Example of Read-out Procedure
Example of read-out procedure of AK9750 data is shown in the following.
The below settings are assumed.
・Continuous Mode 0--> Measurement is automatically repeated.
・Digital Filter Cutoff Frequency Fc=0.6Hz
・Data ready interrupt setting is enable.
--> INT output turns to “Active” at the timing of data ready.
After that, HOST MCU should read out the data.

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Power On

Wait Time 3.0 msec

Register Write(1) Soft Reset
Address : 1DH
Data
: 01H
(2) Mode and Fc setting
Address : 1CH
Data
: 0CH
(3) Interrupt Source setting
Address : 1BH
Data
: 01H

INT output turns to “Active”

Register Read
(4) INT Status
Address : 04H(5) Status1
Address : 05H(6) A/D Converted data of IR1
Address : 06H, 07H(7) A/D Converted data of IR2
Address : 08H, 09H(8) A/D Converted data of IR3
Address : 0AH, 0BH(9) A/D Converted data of IR4
Address : 0CH, 0DH(10) A/D Converted data ofIntegrated Temperature Sensor
Address : 0EH, 0FH(11) Status2
Address : 10H

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12. Serial Interface
The I C bus interface of the AK9750 supports Standard Mode (Max. 100kHz) and High Speed Mode
(Max. 400kHz).
2

12.1. Data Transfer
Initially the start condition should be input to access the AK9750 through the bus. Next, send a one byte
slave address, which includes the device address. The AK9750 compares the a¥slave address, and if
these addresses match, the AK9750 generates an acknowledge signal and executes a Read / Writecommand. The stop condition should be input after executing a command.
12.1.1. Changing state of the SDA line
The SDA line state should be changed only while the SCL line is “L”. The SDA line state must be
maintained while the SCL line is “H”. The SDA line state can be changed while the SCL line is “H”, only
when a Start Condition or a Stop Condition is input.

SCL

SDA
Constant

Changing Stare
EnableFigure 12.1.Changing state of SDA line

12.1.2. Start / Stop Conditions
A Start Condition is generated when the SDA line state is changed from “H” to “L” while the SCL line is“H”. All command start from a Start condition.
A Stop condition is generated when the SDA line state is changed from “L” to “H” while the SCL line is“H”. All command end after a Stop condition.

SCL

SDA
Start Condition

Stop Condition

Figure 12.2. Start / Stop Conditions

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12.1.3. Acknowledge
The device transmitting data will release the SDA line after transmitting one byte of data (SDA line stateis “H”). The device receiving data will pull the SDA line to “L” during the next clock. This operation iscalled “Acknowledge”. The Acknowledge signal can be used to indicate successful data transfers.
The AK9750 will output an acknowledge signal after receiving a Start condition and Slave address.
The AK9750 will output an acknowledge signal after receiving each byte, when the WRITE instruction istransmitted.
The AK9750 will transmit the data stored in the selected address after outputting an acknowledge signal,
when a READ instruction is transmitted. Then the AK9750 will monitor the SDA line after releasing the
SDA line. If the master device generates an Acknowledge instead of Stop condition, the AK9750
transmits an 8-bit data stored in the next address. When the Acknowledge is not generated, transmitting
data is terminated.

Clocl pulse for
Acknowledge

SCL of Master
Device.

189Data Output ofTransmitter
Non-Acknowledge

Data Output
of Receiver
Start Condition

Acknowledge

Figure 12.3. Acknowledge

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12.1.4. Slave Address
The Slave address of the AK9750 can be selected from the following list by setting the CAD0/1 pins.
When the CAD0/1 pins are connected to VSS, the Slave address bit is = “0”. When the CAD0/1 pins areconnected to VDD, the Slave address bit is “1”. Do not set up “CAD1 pin = CAD0 pin = 1” while the I2C
interface is used, because the “CAD1 pin = CAD0 pin = 1” state is only for Switch Mode.
Table 12.1. CAD0/1 pin setting and Slave Address
CAD1 pin CAD0 pin
Slave Address
0
0
64H
0
1
65H
1
0
66H
1
1
Switch Mode
When the first one byte data including the Slave address is transmitted after a Start condition, thedevice, which is specified as the communicator by the Slave address on bus, selected.
After transmitting the Slave address, the device that has the corresponding device address will executea command after transmitting an Acknowledge signal. The 8-bit (Least Significant bit-LSB) of the firstone byte is the R/W bit.
When the R/W bit is set to “1”, a READ command is executed. When the R/W bit is set to “0”, a WRITE
command is executed.
MSB
1

LSB
1

0

0

1

CAD1

CAD0

R/W

Figure 12.4. Slave Address

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12.1.5. WRITE Command
When the R/w bit set to “0”, the AK9750 executes a WRITE Operation. The AK9750 will out an
Acknowledge signal and receive the second byte, after receiving a Start condition and first one byte
(Slave address) in a WRITE Operation. The second byte has an MSB-first configuration, and specifies
the address of the internal control register.
MSB
A7

LSB
A6

A5

A4

A3

A2

A1

A0

Figure 12.5. Register Address
The AK9750 will generate an Acknowledge and receive the third byte after receiving the second byte
(Register Address).
The data after the third byte is the control data. The control data consists of 8-bit and has an MSB-first
configuration. The AL9750 generates an Acknowledge for each byte received. The data transfer isterminated by a Stop condition, generated by the master device.
MSB
D7

LSB
D6

D5

D4

D3

D2

D1

D0

Figure 12.6. Control data
Two or more bytes can be written at once. The AK9750 generates an Acknowledge and receives thenext data after receiving the third byte (Control Data). When the following data is transmitted without a
Stop condition, after transmitting one byte, the internal address counter is automatically incremented,
and data is written in the next address.

DATA(n+1)

P

ACK

DATA(n+x)

ACK

DATA(n)ACK

ACKRegister
Address(n)ACK

SDA S Slave
Address

Stop

R/W= 0ACKStart

The automatic increment function works in the address from 11H to 1CH.Wthen the start address is“11H”, the address is repeatedly incremented as. “11H -> 12H ->…..-> 1CH -> 11H -> 12H…”

Figure 12.7. WRITE Operation

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12.1.6. READ Command
When the R/W bit is set to “1”, the AK9750 executes a READ Operation. When the AK9750 transmits
data from the specified address, the master device generates an Acknowledge instead of a Stopcondition and the next address data can be read out.
The AK9750 supports both current address read and random address read. The automatic increment
function works in the address of 05H to 10H.
When the address 10H is read out, the next address returns to 05H.
(1) Current Address Read
The AK9750 has an integrated address counter. The data specified by the counter is read out in thecurrent address read operation. The internal address counter retains the next address which is accessedat last. For example, when the address which was accessed last is “n”, the data of address “n+1” is readout by the current address read instruction.
The AK9750 will generate an Acknowledge after receiving a Slave address for a Read command (R/W
bit = “1”) in the current address read operation. Then the AK9750 will start to transmit the data specified
by the internal address counter at the next clock, and will increment the internal address counter by one.
When the AK9750 generates a Stop condition instead of an Acknowledge after transmitting the one byte
data, a Read out operation is terminated.

Stop
DATA(n+2)P

ACK

DATA(n+x)

ACK

DATA(n+1)

ACK

DATA(n)ACKS Slave
Address

ACK

SDA

ACK

Start

R/W= “1”Figure 12.8. Current Address Read
(2) Random Read
Data from an arbitrary address can be read out by a random read operation. A random read requires the
input of a dummy WRITE instruction before the input of a slave address of a RED instruction (R/W bit =“1”). To execute a random read, first generate a start condition, then input the slave address for a WRITE
instruction (R/W bit = “0”) and a read address, sequentially.
After the AK9750 generates an Acknowledge in response to this address input, generate a start
condition and the slave address for a READ instruction (R/W)R/W bit = “1”) again. The AK9750
generates an Acknowledge in response to the input of this slave address. Next, the AK9750 output thedata at the specified address, then increments the internal address counter by one.
When a Stop condition from the master device is generated in generated instead of an Acknowledge
after the AK9750 outputs data, Read operation stops.

Stop

DATA(n+x)

DATA(n+1)

DATA(n)

P

ACK

Slave
Address

ACK

S
ACK

ACK

Register
Address(n)ACK

SDA S Slave
Address

R/W= “1”

ACK

Start

Start

R/W= “0”Figure 12.9. Random Read

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12.1.7. EEPROM Write Timing
Writing data to EEPROM should be done at shown timing as the following.

SCL

8th bit

ACK

STOP

WORD ntWR ≥ 10ms

Stop

DATA

P

tWR ≥
10ms

Stop

P
ACK

Data

S

ACK

ACK

ACK

ACK

ACK

ACK

ACK
Start

R/W= “0”EEPROM
Address

EKEY
Register
AddressSlave
P S Address

DATA

ACK

Start

EMODE
Register
AddressSlave
S Address

R/W= “0”

Stop
Start

R/W= “0”Slave
SDA S Address

START

Start

SDA

Figure 12.10. EEPROM Write Timing
Writing data to EEPROM should be done as the sequence that is shown in Figure 12.10.
Writing data to EEPROM can be done after setting EMODE [2:0] = “001”, EEPMODE = “1” andEKEY [7:0] = “A5H”.
Writing data to EEPROM is started at the Stop Condition after inputting the data, and terminated at theStart Condition. EEPROM write time (tWR) should be longer than 10ms.
Two or more bytes cannot be written at once in writing data to EEPROM should be done after setting
EKEY [7:0] = “A5H” again.
On the other hand, reading data from EEPROM is able to be continuously done.

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13. Memory Map
Table 13.1. Register Map
Name

Address

Soft Reset

R/W

WIA1
WIA2
INFO1
INFO2
INTST
ST1
IR1L
IR1H
IR2L
IR2H
IR3L
IR3H
IR4L
IR4H
TMPL
TMPH
ST2
ETH13HETH13HETH13LETH13LETH24HETH24HETH24LETH24LEHYS13
EHYS24
EINTEN

00H
01H
02H
03H
04h
05H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
0EH
0FH
10H
11H
12H
13H
14H
15H
16H
17H
18H
19H
1AH
1BH

DisableDisableDisableDisableEnableEnableEnableEnableEnableEnableEnableEnableEnableEnableEnableEnableDisableEnableEnableEnableEnableEnableEnableEnableEnableEnableEnableEnable

R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W

ECNTL1

1CH

EnableR/W

Data
Content
Company CodeDevice ID
Information
Information
Interrupt Status
Status 1
IR1 A/D Converted data (Low)
IR1 A/D Converted data (High)IR2 A/D Converted data (Low)
IR2 A/D Converted data (High)IR3 A/D Converted data (Low)
IR3 A/D Converted data (High)IR4 A/D Converted data (Low)
IR4 A/D Converted data (High)
Integrated Temperature Sensor Output (Low)
Integrated Temperature Sensor Output (High)
Status 2 (dummy)
IR1 – IR3 Upper Threshold level (Low)
IR1 – IR3 Upper Threshold level (High)IR1 – IR3 Lower Threshold level (low)IR1 – IR3 Lower Threshold level (High)IR2 – IR4 Upper Threshold level (Low)
IR2 – IR4 Upper Threshold level (High)IR2 – IR4 Lower Threshold level (Low)
IR2 – IR4 Lower Threshold Level (High)IR1 – IR3 Hysteresis of Threshold
IR2 – IR4 Hysteresis of Threshold
Interrupt Source Setting
Mode Setting
Fc Setting
Soft Reset

bit
8
8
8
8
3
2
8
8
8
8
8
8
8
8
8
8
6
6
6
6
6
6
6
6
5
5
5
7

CNTL2
1DH
EnableR/W
3
Note:* 12. When Switch Mode (CAD1 = CAD0 = “H”) is selected, “ETH13H to ECNTL1” of registers data
(Address 11H to 1CH) copies “ETH13H to ECNTL1” of EEPROM data (Address 51H to 5CH).

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Table 13.2. EEPROM Map
Name

Address

R/W

EKEY
ETH13HETH13HETH13LETH13LETH24HETH24HETH24LETH24LEHYS13
EHYS24
EINTEN

50H
51H
52H
53H
54H
55H
56H
57H
58H
59H
5AH
5BH

R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W

ECNTL1

5CH

R/W

Data
Content
EEPROM Access key (* 13)
IR1 – IR3 Upper Threshold level (Low)
IR1 – IR3 Upper Threshold level (High)IR1 – IR3 Lower Threshold level (Low)
IR1 – IR3 Lower Threshold level (High)IR2 – IR4 Upper Threshold level (Low)
IR2 – IR4 Upper Threshold level (High)IR2 – IR4 Lower Threshold level (Low)
IR2 – IR4 Lower Threshold level (High)IR1 – IR3 Hysteresis of Threshold
IR2 – IR4 Hysteresis of Threshold
Interrupt Factor Setting
Mode Setting
Fc Setting

bit
8
6
6
6
6
6
6
6
6
5
5
5
7

Note:
* 13. EKEY is registers. When EEPROM Access Mode (EMODE [2:0] bits = “001” and EEPMODE bit =“1”) is selected, EEPROM can be written by setting EKEY [7:0] bits = “A5H”.

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14. Registers Functional Descriptions
Table 14.1. Register Detail Map
D5
D4
D3

Address

Name

D7

D6

D2

D1

D0

00H

WIA1

0

1

0

0

01H

WIA2

0

0

0

1

1

0

0

0

0

0

1

02H

INFO1

0

0

0

0

1

0

0

0

0

03H

INFO2

0

0

0

0

0

0

0

0

04H

INTST

1

1

1

IR13H

IR13L

IR24H

IR24L

DR

05H

ST1

1

1

1

1

1

1

DOR

DRDY

06H

IR1L

IR1_7

IR1_6

IR1_5

IR1_4

IR1_3

IR1_2

IR1_1

IR1_0

07H

IR1H

IR1_15

IR1_14

IR1_13

IR1_12

IR1_11

IR1_10

IR1_9

IR1_8

08H

IR2L

IR2_7

IR2_6

IR2_5

IR2_4

IR2_3

IR2_2

IR2_1

IR2_0

09H

IR2H

IR2_15

IR2_14

IR2_13IR2_12IR2_11

IR2_10

IR2_9

IR2_8

0AH

IR3L

IR3_7

IR3_6

IR3_5

IR3_4

IR3_3

IR3_2

IR3_1

IR3_0

0BH

IR3H

IR3_15

IR3_14

IR3_13IR3_12

IR3_11

IR3_10

IR3_9

IR3_8

0CH

IR4L

IR4_7

IR4_6

IR4_5

IR3_4

IR4_3

IR4_2

IR4_1

IR4_0

0DH

IR4H

IR4_15IR4_14IR4_13IR4_12

IR4_11

IR4_10

IR4_9

IR4_8

0EH

TMPL

TMP_7

TMP_6

TMP_5

TMP_4

TMP_3

TMP_2

TMP_1

TMP_0

0FH

TMPH

TMP_15

TMP_14

TMP_13

TMP_12

TMP_11

TMP_10

TMP_9

TMP_8
1

10H

ST2

1

1

1

1

1

1

1

11H

ETH13HETH13H_4

ETH13H_3

ETH13H_2

ETH13H_1

ETH13H_0

0

0

0

12H

ETH13H0

ETH13H_11

ETH13H_10

ETH13H_9

ETH13H_8

ETH13H_7

ETH13H_6

ETH13H_5

13H

ETH13LETH13L_4

ETH13L_3

ETH13L_2

ETH13L_1

ETH13L_0

0

0

0

14H

ETH13L0

ETH13L_11

ETH13L_10

ETH13L_9

ETH13L_8

ETH13L_7

ETH13L_6

ETH13L_5

15H

ETH24HETH24H_4

ETH24H_3

ETH24H_2

ETH24H_1

ETH24H_0

0

0

0

16H

ETH24H0

ETH24H_11

ETH24H_10

ETH24H_9

ETH24H_8

ETH24H_7

ETH24H_6

ETH24H_5

17H

ETH24LETH24L_4

ETH24L_3

ETH24L_2

ETH24L_1

ETH24L_0

0

0

0

18H

ETH24L0

ETH24L_11

ETH24L_10

ETH24L_9

ETH24L_8

ETH24L_7

ETH24L_6

ETH24L_5

19H

EHYS131

1

1

EHYS13_4

EHYS13_3

EHYS13_2

EHYS13_1

EHYS13_0

1AH

EHYS241

1

1

EHYS24_4

EHYS24_3

EHYS24_2

EHYS24_1

EHYS24_0

1BH

EINTEN

1

1

0

IR13HI

IR13LIIR24HI

IR24LIDRI

1CH

ECNTL1

1

EEPMODE

EFC_2

EFC_1

EFC_0

EMODE_2

EMODE_1

EMODE_0

1DH

CNTL2

1

1

1

1

1

1

1

SRST

[Functional Descriptions]
1). WIA1: Company Code (Read Only Registers)
Address
Name
D7
D6
D5
00H
WIA1
0
1
0

D4
0

D3
1

D2
0

D1
0

D0
0

D4
1

D3
0

D2
0

D1
1

D0
1

1 Byte fixed code as Company code of AKM.
2). WIA2: Device ID (Read Only Registers)
Address
Name
D7
D6
D5
01H
WIA2
0
0
0
1 Byte fixed code as AKM device ID.

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3). INFO1: Information (Read Only Registers)
Address
Name
D7
D6
D5
02H
INFO1
0
0
0

D4
0

D3
0

D2
0

D1
0

D0
1

D4
0

D3
0

D2
0

D1
0

D0
0

D4
IR13H
0

D3
IR13L
0

D2
IR24H
0

D1
IR24L
0

D0
DR
0

INFO1 [7:0]: Information for AKM use only.
4). INFO2: Information (Read Only Registers)
Address
Name
D7
D6
D5
03H
INFO2
0
0
0
INFO2 [7:0]: Reserve5). INTST: Interrupt Status (Read Only Registers)
Address
Name
D7
D6
D5
04H
INTST
Reset
1
1
1

When the correspondent bit in the Interrupt Source Register (EINTEN) is enabled, the interrupt to thehost MCU is available. When the interruption happens, the interrupt source is confirmed by reading theinterrupt status register. When INST register is read out, INT pin turns to “non-active”.
This register is rest, when the differential signal of two IR sensors (IR1 - IR3 / IR2 - IR4) are below “theupper threshold levels - hysteresis” or the differential signal of two IR sensors (IR1 - IR3 / IR2 – IR4) areabove “the lower threshold levels + hysteresis” or the software reset is done or Write accessing to
ECNTL1 register is done.
DR: Data Ready“0”: Normal state“1”: Data ReadyDR bit goes “1”, when the data is ready with DRI bit = “1”IR13H / IR24H: The differential signals of two IR sensors (IR1 - IR3 / IR2 - IR4) are equal to or above theupper threshold levels.
“0”: The differential signals (IR1 – IR3/IR2 – IR4) are below the upper threshold levels.
“1”: The differential signals (IR1 – IR3/IR2 – IR4) are below the upper threshold levels.
When IR13H / IR24HI bit is set to “1” in the interrupt source registers(EINTEN), IR13H / IR24H bit turns
to “1”, when the differential signals (IR1 - IR3 / IR2 - IR4) are equal to or above the upper threshold levels
which are set in ETH13 / ETH24H registers. Otherwise it stays at “0”.
IR13L / IR24L: The differential signals of two IR sensors (IR1 - IR3 / IR2 - IR4) are equal to or below thelower threshold levels.
“0”: The differential signals (IR1 - IR3 / IR2 - IR4) are above the lower threshold levels.
“1”: The differential signals (IR1 - IR3 / IR2 - IR4) are equal to or below the lower threshold levels.
When IR13LI / IR24LI bit set to “1” in the interrupt source registers (EINTEN), IR13L / IR24L bit turns to“1”, when the differential signals (IR1 - IR3 / IR2 - IR4) are equal to or below the lower threshold levels
which are set in ETH13L / ETH24L registers. Otherwise it stays at “0”.

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6). ST1: Status 1 (Read Only Registers)
Address
Name
D7
D6
05H
ST1
Reset
1
1

D5

D4

D3

D2

1

1

1

1

D1
DOR
0

D0
DRDY
0

DRDY: Data Ready“0”: Normal State“1”: Data Ready
The DRDY bit turns to “1”, when the data is ready to be read. This bit turns back to “0”, when either the
ST2 register or one of the measured data (IRS1L to TMPH) is read.
DOR: Data Overrun“0”: Normal State“1”: Data Overrun
The DOR bit turns to “1”, when the data reading is skipped. This bit turns back to “0”, when either the
ST2 register or one of the measured data (IRS1L to TMPH) is read.

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[AK9750]
7). IRxL, IRxH: Measurement Data of IR sensor (x= 1, 2, 3, 4) (Read Only Registers)
Address
Name
D7
D6
D5
D4
D3
D2
D1
IRxL_7
IRxL_6
IRxL_5
IRxL_4
IRxL_3
IRxL_2
IRxL_106,08,0A,0C H
IRxL
07,09,0B,0D H
IRxH IRxH_15 IRxH_14 IRxH_13 IRxH_12 IRxH_11 IRxH_10 IRxH_9
Reset
0
0
0
0
0
0
0

D0
IRxL_0IRxH_80Measurement Data of IR sensor
IRxL [7:0]: Least significant 8-bits in output data
IRxH [15:8]: Most significant 8-bits in output data
16-bit data is stored in tow’s compliment format.
Table 14.2. Measurement Data of IR sensor
Measurement Data IR Sensor [15:0]
Output Current of IR Sensor
Two’s Complement
Hex
Decimal0111 1111 1111 1111
7FFF
32767
14286.4⁞⁞⁞⁞
0101 1001 1001 1000
5998
22936
10000.1⁞⁞⁞⁞
0100 0000 1000 0010
4082
16514
7000.1⁞⁞⁞⁞0000 1000 1111 0110
08F6
2294
1000.2⁞⁞⁞⁞0000 0000 0010 0000
0020
32
14.0
⁞
⁞
⁞
⁞
0000 0000 0000 0000
0000
0
0
⁞
⁞
⁞
⁞
1111 1111 1110 0000
FFE0
-31
13.5
⁞
⁞
⁞
⁞
1111 0111 0000 1001
F709
-2294
-1000.2⁞⁞⁞⁞
1011 1111 0111 1101
BF7D
-16514-7200.1⁞⁞⁞⁞
1010 0110 0110 0111
9667
-22936-10000.1⁞⁞⁞⁞1000 0000 0000 0000
8000
-32768-14286.8

Unit

pA

Note:
* 14. When the digital filter cutoff frequency is set to Fc= 1.1Hz, the output current under 15.8pA cannot
be measured by the noise.

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[AK9750]
8). TMPL, TMPH: Measurement Data of the Integrated temperature Sensor (Read / Write Registers)
Address Name
D7
D6
D5
D4
D3
D2
D1
D0
TMPL_7
TMPL_6
TMPL_5
TMPL_4
TMPL_3
TMPL_2
TMPL_1
TMPL_00EH
TMPL
TMPH_80FH
TMPH TMPH_15 TMPH_14 TMPH_13 TMPH_12 TMPH_11 TMPH_10 TMPH_9
Reset
0
0
0
0
0
0
0
0
Note:
* 15. TMPL_0 bit to TMPL_5 bit are fixed to “0”.
Measurement Data of the Integrated Temperature Sensor
TMPL [7:0]: Least significant 8-bits in output data
TMPH [15:8]: Most significant 8-bits in output data
16-bit data is stored in tow’s compliment format.
Table 14.3. Measurement Data of the Integrated Temperature Sensor
Measurement Data of the Integrated Temperature Sensor [15:0]
Temperature
Two’s Complement
Hex
Decimal
0100 0011 1000 0000
4380
17792
60
⁞
⁞
⁞
⁞
0000 0001 0000 0000
0100
25626.75+0.5⁞⁞⁞⁞0000 0000 0100 0000
0040
6426.75+0.1250000 0000 0000 0000
0000
0
26.75
1111 1111 1100 0000
FFC0
-6426.75-0.125⁞⁞⁞⁞
1111 1111 0000 0000
FF00
-256
26.75-0.5⁞⁞⁞⁞
1011 1001 1000 0000
B980
-18048
-10

Unit

ºC

The Resolution of the Integrated Temperature Sensor
Table 14.4. The Resolution of the Integrated Temperature Sensor
EFC[2:0] Setting
EFC= All Setting
Resolution
10-bit (0.125ºC)
9). ST2: Status 2 (Read Only Registers)
Address Name
D7
D6
D5
D4
D3
D2
D1
D0
10H
ST2
Reset
1
1
1
1
1
1
1
1
Note:
* 16. ST2 register is the dummy data register for the measured data reading routine.ST2 register MUST
be read after reading out the measured data.

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[AK9750]
10). ETH13H, ETH24H, ETH12L, ETH24L: Threshold level setting for the differential outputs(IR1 - IR3 / IR2 - IR4) (Read / Write Registers)
Address
11H
12H
13H
14H
15H
16H
17H
18H

Name

ETH13HETH13HETH13LETH13LETH24HETH24HETH24LETH24L
Reset

D7

D6

D5

D4

D3

D2

D1

D0

TEH13H_4
0
ETH13L_4
0
ETH24H_4
0
ETH24L_4
00

TEH13H_3
ETH13H_11
ETH13L_3
ETH13L_11
ETH24H_3
ETH24H_11
ETH24L_3
ETH24L_11
0

ETH13H_2
ETH13H_10
ETH13L_2
ETH13L_10
ETH24H_2
ETH24H_10
ETH24L_2
ETH24L_10
0

ETH13H_1
ETH13H_9
ETH13L_1
ETH13L_9
ETH24H_1
ETH24_9
ETH24L_1
ETH24L_9
0

ETH13H_0
ETH13H_8
ETH13L_0
ETH13L_8
ETH24H_0
ETH24H_8
ETH24L_0
ETH24L_8
00
ETH13H_7
0
ETH13L_7
0
ETH24H_7
0
ETH24L_7
00
ETH13H_6
0
ETH13L_6
0
ETH24H_6
0
ETH24L_6
00
ETH13H_5
0
ETH13L_5
0
ETH24H_5
0
ETH13L_5
0

Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
TH13H [11:0], TH24H [11:0]: Upper Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
TH13L [11:0], TH24L [11:0]: Lower Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
The setting range is shown in Table 14.5.

Table 14.5. Threshold Level setting for the differential output (IR1 - IR3 / IR2 - IR4)
Threshold level [11:0]
Differential Current Output
Two’s Complement
Hex
Decimal0111 1111 1111
7FF
2047
7139.32⁞⁞⁞⁞0000 0000 0001
001
1
3.48770000 0000 0000
000
001111 1111 1111
FFF
-3.4877⁞⁞⁞⁞
1000 0000 0000
800
-2048
-7142.81

Unit

pA

Differential current output is calculated by the following formula,
Differential current output = 3.4877 x Threshold level [11:0](Decimal)

pA

Note:

* 17. The threshold levels should be set as “ETH13H > ETH13L, ETH24H > ETH24L”. Otherwise, AK9750
cannot operate normally.

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[AK9750]
11). EHYS13, EHYS24: Hysteresis setting of Threshold Level / Polarity setting of INT output.
(Read / Write Registers)
Address
Name
D7
D6
D5
D4
D3
D2
D1
D0
EHYS13_4
EHYS13_3
EHYS13_2
EHYS13_1
EHYS13_0
19H
EHYS13
EHYS24_4
EHYS24_3
EHYS24_2
EHYS24_1
EHYS24_0
1AH
EHYS24
Reset
1
1
1
0
0
0
0
0
Hysteresis setting for Threshold levels
ETHYS13, EHYS24: Hysteresis setting for threshold levels 5-bit
This register is used only in Switch Mode (ECOPY).
Table 14.6. Hysteresis setting of Threshold Level
Hysteresis [4:0]Differential Current Output
Hex
Decimal1F
31108.121E
30
104.63⁞⁞⁞01
13.487700
00

Binary
11111
11110
⁞
00001
00000

Unit

pA

The relationship between the hysteresis and the threshold level is shown in Figure 14.1.
INT Output“H” Level
EHYS13
or
EHYS24

EHYS13
or
EHYS24“L” Level
The Differential Output(IR1 - IR3 / IR2 - IR4)

Figure 14.1. Hysteresis setting for threshold levels.
Detection is defined as the situation in which the differential output (IR1 - IR3 / IR2 - IR4) exceeds thethreshold level.

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[AK9750]
12). EINTEN: Interrupt Source setting (Read / Write Registers)
Address
Name
D7
D6
D5
D4
D3
1BH
EINTEN
IR13HI
IR13LI
Reset
1
1
0
0
0

D2
IR24HI
0

D1
IR24LI0

D0
DRI0

The interrupt to the HOST MCU via the INT output can be obtained by the following methods: INT output
turns to “Active”, when at least one of the enabled interrupt source conditions is satisfied. HOST MCU
can identify the interrupt source by reading the Interrupt Source Status (INST).
When DRI and threshold Level interrupt (IR13HI, IR13LI, IR24HI and IR24LI) are simultaneously set to“Enable”, the priority is given to threshold level interrupt.
DRI: Data ready interrupt setting“0”: Interrupt Disable“1”: Interrupt Enable
Setting DRI bit to “1” enables the interrupt function at the timing of data ready.
IR13HI / IR24HI: Upper threshold level interrupt setting“0”: Interrupt Disable“1”: Interrupt Enable
Setting IR13H / IR24HI bit to “1” enables the interrupt function at the timing in which the differential
output (IR1 - IR3 / IR2 - IR4) changes from the level which is below the upper threshold level to the level
which is above the upper threshold level, or at the timing in which the differential output (IR1 - IR3 / IR2 IR4) changes from the level which is above “the upper threshold level - hysteresis” to the level which is
below “the upper threshold level - hysteresis”.
IR13LI / IR24LI: Lower threshold level interrupt setting.
“0”: Interrupt Disable“1”: Interrupt Enable
Setting IR13LI/IR24LI bit to “1” enables the interrupt function at the timing in which the differential output(IR1 - IR3 / IR2 - IE4) changes from the level which is above the lower threshold level to the level which
is below the lower threshold level, or at the timing in which the differential output (IR1 - IR3 / IR2 - IR4)
changes from the level which is below “the lower threshold level +hysteresis” to the level which is above“the lower threshold level +hysteresis.

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[AK9750]
13). ECNTL1: Mode setting/ Digital Filter Cutoff Frequency (Fc) setting (Read / Write registers)
Address
Name
D7
D6
D5
D4
D3
D2
D1
D0
EEPMODE
EFC_2
EFC_1
EFC_0
EMODE_2
EMODE_1
EMODE_0
1CH
ECNTL1
Reset
1
0
0
0
0
0
0
0
EMODE [2:0]: Mode setting“000”: Stand-by Mode“001”: EEPROM Access Mode (EEPMODE bit should be set to “1” simultaneously)“010”: Shingle Shot Mode“011”: Be prohibited“100”: Continuous Mode 0 (Normal operation)“101”: Continuous Mode 1 (Intermittent operation => Measurement time: Wait time = 1:1)
“110”: Continuous Mode 2 (Intermittent operation => Measurement time: Wait time = 1:3)
“111”: Continuous Mode 3 (Intermittent operation => Measurement time: Wait time = 1:7)
EFC [2:0]: Digital Filter Cutoff Frequency (Fc) setting“000”: Fc = 0.3Hz“001”: Fc = 0.6Hz“010”: Fc = 1.1Hz“011”: Fc = 2.2Hz“100”: Fc = 4.4Hz“101”: Fc = 8.8Hz“11x”: Be prohibited
The digital filter is “sinc function” type. The Fc is defined as the frequency at which Gain is -3dB.
EEPMODE Setting“0”: Normal Mode“1”: EEPROM Access Mode (EMODE [2:0] bits should be set to “001” simultaneously)
14). CNTL2: Soft Reset (Read / Write Registers)
Address
Name
D7
D6
D5
1DH
CNTL2
Reset
1
1
1

D4

D3

D2

D1

D0
SRST

1

1

1

1

0

SRST: Soft Reset“0”: Normal State“1”: Reset
All registers are reset by setting SRST bit to “1”. SRST bit automatically returns to “0” after reset isactivated.

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15. EEPROM Functional Descriptions
Table 15.1. EEPROM Detail Map
D5
D4
D3

Address

Name

D7

D6

D2

D1

D0

50H

EKEY

EKEY_7

EKEY_6

EKEY_5

EKEY_4

EKEY_3

EKEY_2

EKEY_1

EKEY_051H

ETH13H

1

1

ETH13H_5

ETH13H_4

ETH13H_3

ETH13H_2

ETH13H_1

ETH13H_0

52H

ETH13H

1

1

53H

ETH13L1

1

ETH13H_11

ETH13H_10

ETH13H_9

ETH13H_8

ETH13H_7

ETH13H_6

ETH13L_5

ETH13L_4

ETH13L_3

ETH13L_2

ETH13L_1

ETH13L_0

54H

ETH13L1

1

ETH13L_11

ETH13L_10

ETH13L_9

ETH13L_8

ETH13L_7

ETH13L_6

55H

ETH24H

1

1

56H

ETH24H

1

1

ETH24H_5

ETH24H_4

ETH24H_3

ETH24H_2

ETH24H_1

ETH24H_0

ETH24H_11

ETH24H_10

ETH24H_9

ETH24H_8

ETH24H_7

ETH24H_6

57H

ETH24L

1

1

ETH24L_5

ETH24L_4

ETH24L_3

ETH24L_2

ETH24L_1

ETH24L_0

58H

ETH24L

1

59H

EHYS131

1

ETH24L_11

ETH24L_10

ETH24L_9

ETH24L_8

ETH24L_7

ETH24L_6

1

1

EHYS13_4

EHYS13_3

EHYS13_2

EHYS13_1

EHYS13_0

5AH

EHYS241

1

1

EHYS24_4

EHYS24_3

EHYS24_2

EHYS24_1

EHYS24_0

5BH
5CH

EINTEN

1

1

0

IR13HI

IR13LIIR24HI

IR24LIDRIECNTL1

1

1

EFC_2

EFC_1

EFC_0

EMODE_2

EMODE_1

EMODE_0

5DH

1

1

1

1

1

1

1

1

5EH

1

1

1

1

1

1

1

1

5FH

1

1

1

1

1

1

1

1

AKEY_7

AKEY_6

AKEY_5

AKEY_4

AKEY_3

AKEY_2

AKEY_1

AKEY_060H

AKEY[Functional Descriptions]1). EKEY: EEPROM WRITE ENABLE setting (Read / Write Registers)
Address
Name
D7
D6
D5
D4
D3
EKEY_7
EKEY_7
EKEY_7
EKEY_7
EKEY_7
50H
EKEY

D2

D1

D0

EKEY_7

EKEY_7

EKEY_7

Writing data to EEPROM is enabled by setting EKEY [7:0] to “A5H”.
Since 51H of 5CH of EEPROM correspond to 11H to 1CH of registers, please refer to the details of aregister function.
*The bit position in 51H, 53H, 55H and 57H of EEPROM do not correspond to the bit positions in 11H,
13H, 15H and 17H of registers.

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16. First data Determination TimeThe First data determination time is defined as the time between “setting the registers” and “determining
the measurement data”. It depends on Measurement Mode setting and Digital Filter setting.
Since the first data determination time also depends on the OCS frequency, Min./Max. is Typ. ±10%.
<First data Determination Time (Typ.) in each Measurement Mode>
Table 16.1. First data Determination Time
EMODE [2:0]Single Shot Mode
Continuous Node0
Continuous Mode1
Continuous Mode2
Continuous Mode3

EFC= “0H”
2.309
2.309
2.309
2.309
2.309

EFC= “1H”
1.157
1.157
1.157
1.157
1.157

EFC [2:0]
EFC= “2H” EFC= “3H”
0.581
0.293
0.581
0.293
0.581
0.293
0.581
0.293
0.581
0.293

EFC= “4H”
0.149
0.149
0.149
0.149
0.149

Unit

EFC= “5H”
0.077
0.077
0.077
0.077
0.077

sec

Note:
* 18. In Switch Mode, the first data determination time is defined as the time between “Power on Resetand determining INT output measurement data”. The first data determination time is 0.02 second
longer than time shown in Table 16.1, in Switch Mode.

17. Data Sampling Period
The data sampling period is defined as the time in which AK9750 updates an IR measurement data
periodically after determining the first data. The data sampling period depends on Measurement Modesetting and Digital Filter setting. Since the data sampling period also depends on the OCS frequency,
Min / Max. is Typ. ±10%.
<Data Sampling Period of IR Sensor in each Measurement Mode>
Table 17.1. Data Sampling Period (Typ.) of IR Sensor
EMODE [2:0]Continuous Mode 0
Continuous Mode 1
Continuous Mode 2
Continuous Mode 3

EFC= “0H”
0.576
4.608
9.216
18.432

EFC= “1H”
0.288
2.304
4.608
9.216

EFC [2:0]
EFC= “2H” EFC= “3H”
0.144
0.072
1.152
0.576
2.304
1.152
4.608
2.304

EFC= “4H”
0.036
0.288
0.576
1.152

EFC= “5H”
0.018
0.144
0.288
0.576

Unit

sec

<Data Sampling Period of Temperature Sensor data in each Measurement Mode>
The data sampling period of the temperature sensor is changed by changing EMODE [2:0] as shown in
Table 17.2. The data sampling period of the temperature sensor does not depend on the digital filter
setting (EFC [2:0]).
Table 17.2. Data Sampling Period (Typ.) of Temperature Sensor
EMODE [2:0]
PeriodUnit
Continuous Mode 0
0.576
Continuous Mode 1
4.608
sec
Continuous Mode 2
9.216
Continuous Mode 3
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[AK9750]

18. Sensor’s Output (Reference)
Ts: Sensor Temperature
Ttgt: Target Temperature

Figure 18.1. IR Output

19. Spectrum Sensitivity (Reference)

Figure 19.1. Spectrum Sensitivity<Measurement Conditions>Sensor Temperature Ts= 25ºC (298K)

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20. Field of View (Reference)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Field of View(* 19)
FOV
±48
±55
±66
deg(º)
Note:* 19. The combined range observed by Upper/Lower (Left/Right) sensors. Reference data only, nottested.

Figure 20.1. Field of View (Typ.)<Measurement Conditions>Ambient Temperature: Ta=25℃
Block Body: Φ12.7mm Tb= 500K
Distance between Black Body and AK9750: 140mm

140mm
AK9750θBlack Body

Rotation Axis (Sensor Chip)

Figure 20.2. Measurement Conditions

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21. Recommended External Circuits
DVDD

DVDD

DVDD DVDD DVDD

VDD1

330Ω

Power for I/F
SCL
DVDD

1.0µF

VDD
1.0µF

VSS

I2C I/F

SDA

AKM

INT

AK9750

CAD0

TEST
CAD1

INT INPUT

Slave Address Select:
CAD0 and CAD1 must beconnected to VDD or VSS.

DigitalOutput
GND

PDN

VSS

HOST
MCU

VSS VSS

VSS

Figure 21.1. Recommended External Circuits

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[AK9750]

22. Package
22.1. Outline Dimensions
10-pin SON (Unit mm)
Unless otherwise specified: ±0.1mm

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22.2. Pad Dimensions(Unit: mm)

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[AK9750]

22.3. Marking

5C11

1

Lot
Day
Month
Year
Year
Mark
0
1
2
3
4
5
6
7
8
9

Year
2020
2021
2022
2023
2024
2015
2016
2017
2018
2019

Mark
C
D
E
F
G
H
J
K
L
M
N
P

Month
Month
January
February
March
April
May
June
July
AugustSeptember
OctoberNovember
December

Day
Mark
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
F
G
H
J
K
L
N
P
R
S
T
U
V
W
X
Y

015002896-E-01

Lot
Day
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
10th
11th
12th
13th
14th
15th
16th
17th
18th
19th
20th
21th
22th
23th
24th
25th
26th
27th
28th
29th
30th
31th

Mark
1
2
3
4
5
6
7
8
9
0
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
U
V
W
X
Y
Z

Lot
1 Lot
2 Lot
3 Lot
4 Lot
5 Lot
6 Lot
7 Lot
8 Lot
9 Lot
10 Lot11 Lot12 Lot13 Lot14 Lot15 Lot16 Lot17 Lot18 Lot19 Lot20 Lot21 Lot22 Lot23 Lot24 Lot25 Lot26 Lot27 Lot28 Lot29 Lot30 Lot31 Lot32 Lot33 Lot2015/10- 47 -

[AK9750]

23. Ordering Guide
AK9750-30 ~ 85ºC

10-pin SON

24. Revision History
Date (Y/M/D)

Revision

15/03/02

00

15/10/07

ReasonFirst Edition
Registration

Page

Removed14

Added

21, 22Added

36

Corrected

43

-

01

015002896-E-01

Contents
Removing the description of the case that
AKM software is used.
Describing an example of the procedure andthe flow chart to read out AK9750 data.
Describing the formula obtaining differential
current output from threshold level codes.
Correcting the unit of blackbody temperature.
(Tb=500℃→500K)

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[AK9750]

IMPORTANT NOTICE
0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to theinformation contained in this document without notice. When you consider any use orapplication of AKM product stipulated in this document (“Product”), please make inquiries thesales office of AKM or authorized distributors as to current status of the Products.
1. All information included in this document are provided only to illustrate the operation andapplication examples of AKM Products. AKM neither makes warranties or representations withrespect to the accuracy or completeness of the information contained in this document nor
grants any license to any intellectual property rights or any other rights of AKM or any third party
with respect to the information in this document. You are fully responsible for use of suchinformation contained in this document in your product design or applications. AKM ASSUMESNO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROMTHE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS.
2. The Product is neither intended nor warranted for use in equipment or systems that require
extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which
may cause loss of human life, bodily injury, serious property damage or serious public impact,
including but not limited to, equipment used in nuclear facilities, equipment used in theaerospace industry, medical equipment, equipment used for automobiles, trains, ships andother transportation, traffic signaling equipment, equipment used to control combustions or
explosions, safety devices, elevators and escalators, devices related to electric power, andequipment used in finance-related fields. Do not use Product for the above use unlessspecifically agreed by AKM in writing.
3. Though AKM works continually to improve the Product’s quality and reliability, you areresponsible for complying with safety standards and for providing adequate designs andsafeguards for your hardware, software and systems which minimize risk and avoid situations
in which a malfunction or failure of the Product could cause loss of human life, bodily injury or
damage to property, including data loss or corruption.
4. Do not use or otherwise make available the Product or related technology or any information
contained in this document for any military purposes, including without limitation, for the design,development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or
missile technology products (mass destruction weapons). When exporting the Products or
related technology or any information contained in this document, you should comply with theapplicable export control laws and regulations and follow the procedures required by such laws
and regulations. The Products and related technology may not be used for or incorporated into
any products or systems whose manufacture, use, or sale is prohibited under any applicable
domestic or foreign laws or regulations.
5. Please contact AKM sales representative for details as to environmental matters such as the
RoHS compatibility of the Product. Please use the Product in compliance with all applicablelaws and regulations that regulate the inclusion or use of controlled substances, including
without limitation, the EU RoHS Directive. AKM assumes no liability for damages or losses
occurring as a result of noncompliance with applicable laws and regulations.
6. Resale of the Product with provisions different from the statement and/or technical features set
forth in this document shall immediately void any warranty granted by AKM for the Product andshall not create or extend in any manner whatsoever, any liability of AKM.
7. This document may not be reproduced or duplicated, in any form, in whole or in part, without
prior written consent of AKM.

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