SCLtHDSTAtHDDATtHIGH

DATA SHEETt
LP
Series – DigitaltSUSTASUSTOLP Series – Digital
MERIT SENSOR 1420 I2C COMMUNICATION
Communications to the 1420 is read only. To read the pressure counts, the master performs a read request by assertinga start condition, sending the 7 bit address of the part (If the part has an open address, 7 bits of anything is acceptable),and sets the read/write bit. The master then waits for an acknowledgment. The acknowledgment is sent by the pressure
sensor along with 2 bits of status and bits 13:8 of the pressure counts, the master acknowledges the first 8 bits, and thepressure sensor sends the remaining 8 bits of data. The Master then does not acknowledge and sends a stop condition
signaling the end of the transaction.

MASTER
S

6

5

4

3

SLAVE

2

1

0

RW

A

SB

SB

\------------DEVICE ADDRESS-------------------/

S

13

12

10

9

8

A

\---------SENSOR DATA [13:8]----------/

Device Slave Address#

Data Bit

RW Read/Write Bit

A

Acknowledge Bit

N

No Acknowledge Bit

ST

SB

Status Bits

Stop Condition

7

6

5

4

3

COMPANY: Merit Sensor is a leader in piezoresistive
pressure sensing and partners with clients to create highperforming solutions for a variety of applications and industries.

MASTER
2

1

0

N

ST

\----------------SENSOR DATA [7:0]------------------/#Start Conditioning

SLAVE

MASTER

11

LP Series - Digital is a surface mountable pressure sensor package with acompensated digital output suitable for ultra-low pressure sensing applications.

SENTIUM: Merit Sensor products incorporate a proprietary
Sentium® technology developed to provide superior stability.

Status Bits0
Normal Operation, Good Packet
001
Device in Command Mode01
Stale Data
Diagnostic Condition Exsists
1
1

TECHNOLOGY: Merit Sensor utilizes a piezoresistive Wheatstonebridge in a design that anodically bonds glass to a chemically etchedsilicon diaphragm. All products are RoHS compliant.

CAPABILITIES: Merit Sensor designs, engineers, fabricates,*Used by permission, IDT

dices, assembles, tests, and sells die and packaged products froma state-of-the-art facility near Salt Lake City, Utah.

TRANSFER FUNCTION EXAMPLESFEATURES

Example 1: 0.15 PSI Gage

Part: 1420-P15G-xx11-111

Part: 1420-P15G-xx11-111

0.16875=0.0 PSI

Pmax=0.15 PSI

OutputDigital I2C

TypeGage, Differential and AbsoluteMedia

Clean, Dry Air and Non-corrosive Gases

Packaging

Tape and Reel

1420 Family Part Number Configurator

0.131250.1125

Pcounts =7215
PSI

0.09375

Max =16384(

Ppsi = ( Pmax – Pmin

0.04 to 15 psi (2.5 mbar to 1 bar; 250 Pa to
100 kPa KPa; 1 in H2O to 415 in H2O)

Calibrated Range (Pressure)

0.15

Pmin

Pressure
Range

0.05625

Pcounts – 0.1 • Max
0.8 • Max•

7215 – 0.1•16384

PPsi = ( 0.15 – 0.0 •(0.8 •16384

0.075+ Pmin0.03750.01875+00-0.018750

PPsi = .0638 Psi

1638

3276

4914

6552

8190

9828

11466

13104

14742

16380

Customization Supply Voltage, Temperature Calibration Range,
Output Range, Accuracy Specification,
Update Rate, etc

Counts

Part: 1420-P50D-xx11-111
0.625

Part: 1420-P50D-xx11-111
Pmin= -0.5 PSI

Pmax= 0.5 PSI

Cost

0.375
0.25

PSI

Pcounts =8192
Max =16384

Security0.125
0-0.125(

PPsi = ( 0.5 – ( –0.5

Pcounts – 0.1 • Max
0.8 • Max••

8192– 0.1•16384
0.8 •16384+ Pmin

Speed

0.375
-0.5

+(–0.5-0.625

0

1638

3276

4914

6552

8190

9828

11466

13104

14742

16380

CountsService

D = Differential
G = Gage
A = Absolute

Clock Speed

Save money over time with high-performing die

1 = 1MHz

Feel confident doing business with an experienced
company backed by a solid parent company(NASDAQ: MMSI)I 2C Address

-0.25

(

Ppsi = ( Pmax – Pmin((

PPsi = 0.0 Psi

Performance Enjoy best-in-class performance due to Merit’s
proprietary Sentium technology

Calibrated Range (Pressure)

0.5

P04 = 250 Pa
P07 = 500 Pa
P15 = .15psi
P30 = .30psi
1P0 = 1.0psi
15P = 15psi

Reference

BENEFITS
Example 2: -.5 to .5 PSI Differential

1420-XXXX-XX1X-XX1
Pressure

Get to market quickly with creative andflexible solutions
Experience prompt, personal andprofessional support

0 = 0x28
1 = 0x38
2 = 0x48
3 = 0x58
4 = 0x68
5 = 0x78
6 = Open*

Pin Type
1 = J-leadPort
1 = Dualhorizontal,
facing same
direction
2 = Single
Horizontal

Calibrated
Supply Voltage
1 = 5.0V
2 = 3.3V

Update Rate
1 = 25ms
2 = 5msec

Operation Mode
1 = Update mode
constant*Device will respond to any address.
Sales +1 801.208.4722 · Customer Service +1 801.208.4700 · Fax +1 801.208.4798 · sales@meritsensor.com · www.MeritSensor.com
1600 W. Merit Parkway · South Jordan, Utah · 84095 · USA

Sales +1 801.208.4722 · Customer Service +1 801.208.4700 · Fax +1 801.208.4798 · sales@meritsensor.com · www.MeritSensor.com
1600 W. Merit Parkway · South Jordan, Utah · 84095 · USA

1420seriesDS.016

LP Series – Digital

LP Series – Digital

SPECIFICATIONSParameter

Minimum

TypicalMaximum

Units

Notes

Supply Voltage (Vs)

4.5

5

5.5

V

Depending on calibrated supply voltage

Supply Voltage (Vs)

3.0

3.3

3.6

V

Depending on calibrated supply voltage

Supply Current

1.2

2

3.5

mA

(1)

Operating Temperature

-40

85

°C

Storage Temperature

-55

100

°C

DIMENSIONS FOR STANDARD OPTIONS (in millimeters)

Electrical

Dimensions for reference only. Engineering drawings (with tolerance) available upon order.

13
-1.5

1.5

%FS

Long-Term Stability

-0.5

0.5

%FS

Startup Time

10

ms

25

ms

Digital Update Time

5
Proof Pressure

5X

Burst Pressure

10X

ms

•

3.6
8

8

Notes:(1) @5V input voltage,(2) Over 0°C to 60°C
(3) Applicable if Vs = ±5% of
the calibrated Vs(4) Full scale pressure(2) (3)

7
7

6
6

7

8

5

Pcounts – 0.1 • Max
0.8 • Max

6

5
2.2

12.7
12.7

11.4
11.4

2

1
2.5

2

1

3
3

1.9

4

Depending on the part configuration
1.3+ Pmin(Media Compatibility

For Use With Non-corrosive Dry Gasses
Solder temperature: max 250 °C, 5 seconds max

P1 = Vs

8.4
8.4

P2 = N/C
P3 = N/C
P4 = VSS - Ground
2.5
2.5

2.5

P6 = N/C

2.5

P7 = SDA - I2C data

= Measured Pressure in PSI= Pressure Counts from Merit Sensor Part= Minimum Pressure= Maximum Pressure= 16384 = 14 Bits

P8 = SCL - I2C clock

CROSS SECTION FOR ABSOLUTEMEMS sensing element(differential pressure)Soft die attach material

Integrated signal
Conditionioning(ASIC)Media inlet ports

P5 = N/C

2.5

I2C PARAMETERS *CROSS SECTION FOR DIFFERENTIAL AND GAGE

Cover/mechanical protection

4
4

Device Pinout

SMT Landing Pad Layout
SMT Landing Pad Layout

1.3

3

11.3
11.3

10.2
10.2

1.9

4

3

2

1
2

1

2.5

Where
Ppsi
Pcounts
PMin
PMax
Max

5
5

2.2

2.5

Faster or slower available depending on
the part configuration. For faster updatemode, there could be more variation in
the output, and some increase in power
consumption. The significance will be
determined in the customer application.

6

7

(4)

Transfer Function Formula

Ppsi = ( Pmax – Pmin

3.6

2.5
2.5

8

Bits

Pressure Accuracy

2.5

2.5

Performance
Effective ADC Resolution

2.5
2.5

Filter capacitor

Parameter

Symbol

Min

Typ

Max

Units

SCL clock frequency

fSCL

-		

100

kHz

Start condition hold time relative to SCL edge

tHDSTA

0.1			μs

1

Minimum SCL clock low widthtLOW

0.6			μs

Minimum SCL clock high width1

tHIGH

0.6			μs

Start condition setup time relative to SCL edgetSUSTA

0.1			μs

Data hold time on SDA relative to SCL edgetHDDAT

0.0			μs

Data setup time on SDA relative to SCL edgetSUDAT

0.1			μs

Stop condition setup time on SCL

tSUSTO

0.1			μs

Bus free time between stop condition and start conditiontBUS

2			μs1Combined low and high widths must equal or exceed minimum SCLK period.

ELECTRICALElectrical connections

PACKAGING

I2C TIMING DIAGRAM*

Note: Power supply decoupling included

16.0mm1
Vs

SDA

32.0mmDigital out
SSC

SCL 8
SDA 7

tSUSDAT

tLOW

tBUS

tHDSTA

SCL

2.0mm
4.0mm

tHDSTA

Gnd
4tHDDATtHIGHtSUSTAtSUSTOLP Series – Digital

LP Series – Digital

SPECIFICATIONSParameter

Minimum

TypicalMaximum

Units

Notes

Supply Voltage (Vs)

4.5

5

5.5

V

Depending on calibrated supply voltage

Supply Voltage (Vs)

3.0

3.3

3.6

V

Depending on calibrated supply voltage

Supply Current

1.2

2

3.5

mA

(1)

Operating Temperature

-40

85

°C

Storage Temperature

-55

100

°C

DIMENSIONS FOR STANDARD OPTIONS (in millimeters)

Electrical

Dimensions for reference only. Engineering drawings (with tolerance) available upon order.

13
-1.5

1.5

%FS

Long-Term Stability

-0.5

0.5

%FS

Startup Time

10

ms

25

ms

Digital Update Time

5
Proof Pressure

5X

Burst Pressure

10X

ms

•

3.6
8

8

Notes:(1) @5V input voltage,(2) Over 0°C to 60°C
(3) Applicable if Vs = ±5% of
the calibrated Vs(4) Full scale pressure(2) (3)

7
7

6
6

7

8

5

Pcounts – 0.1 • Max
0.8 • Max

6

5
2.2

12.7
12.7

11.4
11.4

2

1
2.5

2

1

3
3

1.9

4

Depending on the part configuration
1.3+ Pmin(Media Compatibility

For Use With Non-corrosive Dry Gasses
Solder temperature: max 250 °C, 5 seconds max

P1 = Vs

8.4
8.4

P2 = N/C
P3 = N/C
P4 = VSS - Ground
2.5
2.5

2.5

P6 = N/C

2.5

P7 = SDA - I2C data

= Measured Pressure in PSI= Pressure Counts from Merit Sensor Part= Minimum Pressure= Maximum Pressure= 16384 = 14 Bits

P8 = SCL - I2C clock

CROSS SECTION FOR ABSOLUTEMEMS sensing element(differential pressure)Soft die attach material

Integrated signal
Conditionioning(ASIC)Media inlet ports

P5 = N/C

2.5

I2C PARAMETERS *CROSS SECTION FOR DIFFERENTIAL AND GAGE

Cover/mechanical protection

4
4

Device Pinout

SMT Landing Pad Layout
SMT Landing Pad Layout

1.3

3

11.3
11.3

10.2
10.2

1.9

4

3

2

1
2

1

2.5

Where
Ppsi
Pcounts
PMin
PMax
Max

5
5

2.2

2.5

Faster or slower available depending on
the part configuration. For faster updatemode, there could be more variation in
the output, and some increase in power
consumption. The significance will be
determined in the customer application.

6

7

(4)

Transfer Function Formula

Ppsi = ( Pmax – Pmin

3.6

2.5
2.5

8

Bits

Pressure Accuracy

2.5

2.5

Performance
Effective ADC Resolution

2.5
2.5

Filter capacitor

Parameter

Symbol

Min

Typ

Max

Units

SCL clock frequency

fSCL

-		

100

kHz

Start condition hold time relative to SCL edge

tHDSTA

0.1			μs

1

Minimum SCL clock low widthtLOW

0.6			μs

Minimum SCL clock high width1

tHIGH

0.6			μs

Start condition setup time relative to SCL edgetSUSTA

0.1			μs

Data hold time on SDA relative to SCL edgetHDDAT

0.0			μs

Data setup time on SDA relative to SCL edgetSUDAT

0.1			μs

Stop condition setup time on SCL

tSUSTO

0.1			μs

Bus free time between stop condition and start conditiontBUS

2			μs1Combined low and high widths must equal or exceed minimum SCLK period.

ELECTRICALElectrical connections

PACKAGING

I2C TIMING DIAGRAM*

Note: Power supply decoupling included

16.0mm1
Vs

SDA

32.0mmDigital out
SSC

SCL 8
SDA 7

tSUSDAT

tLOW

tBUS

tHDSTA

SCL

2.0mm
4.0mm

tHDSTA

Gnd
4tHDDATtHIGHtSUSTAtSUSTOSCLtHDSTAtHDDATtHIGH

DATA SHEETt
LP
Series – DigitaltSUSTASUSTOLP Series – Digital
MERIT SENSOR 1420 I2C COMMUNICATION
Communications to the 1420 is read only. To read the pressure counts, the master performs a read request by assertinga start condition, sending the 7 bit address of the part (If the part has an open address, 7 bits of anything is acceptable),and sets the read/write bit. The master then waits for an acknowledgment. The acknowledgment is sent by the pressure
sensor along with 2 bits of status and bits 13:8 of the pressure counts, the master acknowledges the first 8 bits, and thepressure sensor sends the remaining 8 bits of data. The Master then does not acknowledge and sends a stop condition
signaling the end of the transaction.

MASTER
S

6

5

4

3

SLAVE

2

1

0

RW

A

SB

SB

\------------DEVICE ADDRESS-------------------/

S

13

12

10

9

8

A

\---------SENSOR DATA [13:8]----------/

Device Slave Address#

Data Bit

RW Read/Write Bit

A

Acknowledge Bit

N

No Acknowledge Bit

ST

SB

Status Bits

Stop Condition

7

6

5

4

3

COMPANY: Merit Sensor is a leader in piezoresistive
pressure sensing and partners with clients to create highperforming solutions for a variety of applications and industries.

MASTER
2

1

0

N

ST

\----------------SENSOR DATA [7:0]------------------/#Start Conditioning

SLAVE

MASTER

11

LP Series - Digital is a surface mountable pressure sensor package with acompensated digital output suitable for ultra-low pressure sensing applications.

SENTIUM: Merit Sensor products incorporate a proprietary
Sentium® technology developed to provide superior stability.

Status Bits0
Normal Operation, Good Packet
001
Device in Command Mode01
Stale Data
Diagnostic Condition Exsists
1
1

TECHNOLOGY: Merit Sensor utilizes a piezoresistive Wheatstonebridge in a design that anodically bonds glass to a chemically etchedsilicon diaphragm. All products are RoHS compliant.

CAPABILITIES: Merit Sensor designs, engineers, fabricates,*Used by permission, IDT

dices, assembles, tests, and sells die and packaged products froma state-of-the-art facility near Salt Lake City, Utah.

TRANSFER FUNCTION EXAMPLESFEATURES

Example 1: 0.15 PSI Gage

Part: 1420-P15G-xx11-111

Part: 1420-P15G-xx11-111

0.16875=0.0 PSI

Pmax=0.15 PSI

OutputDigital I2C

TypeGage, Differential and AbsoluteMedia

Clean, Dry Air and Non-corrosive Gases

Packaging

Tape and Reel

1420 Family Part Number Configurator

0.131250.1125

Pcounts =7215
PSI

0.09375

Max =16384(

Ppsi = ( Pmax – Pmin

0.04 to 15 psi (2.5 mbar to 1 bar; 250 Pa to
100 kPa KPa; 1 in H2O to 415 in H2O)

Calibrated Range (Pressure)

0.15

Pmin

Pressure
Range

0.05625

Pcounts – 0.1 • Max
0.8 • Max•

7215 – 0.1•16384

PPsi = ( 0.15 – 0.0 •(0.8 •16384

0.075+ Pmin0.03750.01875+00-0.018750

PPsi = .0638 Psi

1638

3276

4914

6552

8190

9828

11466

13104

14742

16380

Customization Supply Voltage, Temperature Calibration Range,
Output Range, Accuracy Specification,
Update Rate, etc

Counts

Part: 1420-P50D-xx11-111
0.625

Part: 1420-P50D-xx11-111
Pmin= -0.5 PSI

Pmax= 0.5 PSI

Cost

0.375
0.25

PSI

Pcounts =8192
Max =16384

Security0.125
0-0.125(

PPsi = ( 0.5 – ( –0.5

Pcounts – 0.1 • Max
0.8 • Max••

8192– 0.1•16384
0.8 •16384+ Pmin

Speed

0.375
-0.5

+(–0.5-0.625

0

1638

3276

4914

6552

8190

9828

11466

13104

14742

16380

CountsService

D = Differential
G = Gage
A = Absolute

Clock Speed

Save money over time with high-performing die

1 = 1MHz

Feel confident doing business with an experienced
company backed by a solid parent company(NASDAQ: MMSI)I 2C Address

-0.25

(

Ppsi = ( Pmax – Pmin((

PPsi = 0.0 Psi

Performance Enjoy best-in-class performance due to Merit’s
proprietary Sentium technology

Calibrated Range (Pressure)

0.5

P04 = 250 Pa
P07 = 500 Pa
P15 = .15psi
P30 = .30psi
1P0 = 1.0psi
15P = 15psi

Reference

BENEFITS
Example 2: -.5 to .5 PSI Differential

1420-XXXX-XX1X-XX1
Pressure

Get to market quickly with creative andflexible solutions
Experience prompt, personal andprofessional support

0 = 0x28
1 = 0x38
2 = 0x48
3 = 0x58
4 = 0x68
5 = 0x78
6 = Open*

Pin Type
1 = J-leadPort
1 = Dualhorizontal,
facing same
direction
2 = Single
Horizontal

Calibrated
Supply Voltage
1 = 5.0V
2 = 3.3V

Update Rate
1 = 25ms
2 = 5msec

Operation Mode
1 = Update mode
constant*Device will respond to any address.
Sales +1 801.208.4722 · Customer Service +1 801.208.4700 · Fax +1 801.208.4798 · sales@meritsensor.com · www.MeritSensor.com
1600 W. Merit Parkway · South Jordan, Utah · 84095 · USA

Sales +1 801.208.4722 · Customer Service +1 801.208.4700 · Fax +1 801.208.4798 · sales@meritsensor.com · www.MeritSensor.com
1600 W. Merit Parkway · South Jordan, Utah · 84095 · USA

1420seriesDS.016