CA0027AN
GPS antenna diagnosis IC■ Product summary
CA0027AN is an IC that supplies power to GPS antenna, and outputs alarm signal by diagnosing
connection status (Open/Short-circuit) of GPS antenna by monitoring current.
The threshold for short-circuit detection current can be adjusted by external resistor.
Limit current is determined along with the threshold, and the IC supports various GPS antenna flexibly.
■ Features
 Antenna supply voltage: VCC-0.28V (antenna current=20mA)
 Open detection current: 4.5mA(TYP) Short-circuit detection current: 25mA to 70mA(TYP) Limit current range: 35mA to 90mA(TYP) Open collector output
 Package type: SON 8pin 2.2mm×2.2mm back side thermal pad included Automotive grade(AEC-Q100 Grade-2 qualified)■ Maximum ratings
Item

SymbolRating

Unit

Power supply voltage

VCC

7.0V

Power dissipation※
Ta=25°C

Pd

Mounting board 1：2400
Mounting board 2：3200mW

Junction temperature

Tjmax+150°C

Operating ambient temperature
Storage temperature

ToprTstg-40 to +105
-40 to 125°C°C※Measurements board information
Mounting board 1:114.3mm×76.2mm×t1.6mm, FR-4, 2-layer, Connect the thermal pad to the through via (φ=0.3mm, N=2)
Mounting board 2:114.3mm×76.2mm×t1.6mm, FR-4, 4-layer, Connect the thermal pad to the through via (φ=0.3mm, N=2)

Note
Be sure to ensure heat dissipation performance by soldering the backside thermal pad of the package andconnecting to solid GND of the board.
Inadequate heat dissipation performance may cause malfunction or permanent breakdown.

■ Package thermal resistance
Item

SymbolPackage thermal resistanceθja

Between chip and package surface
thermal resistanceψjt

Mounting board Condition※
Mounting board 1

Value51

Mounting board 238

Mounting board 1

5.0

Mounting board 2

4.3

Unit°C/W°C/W※Measurements board information
Mounting board 1:114.3mm×76.2mm×t1.6mm, FR-4, 2-layer, Connect the thermal pad to the through via (φ=0.3mm, N=2)
Mounting board 2:114.3mm×76.2mm×t1.6mm, FR-4, 4-layer, Connect the thermal pad to the through via (φ=0.3mm, N=2)

■ Recommended operating conditions
Item

SymbolRatingUnit

Power supply voltageVCC

3.0 to 5.5

V

Note: The contents of this documents may be subject to change without prior notice, please contact our sales
representative for the latest version.
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GPS antenna diagnosis IC

CA0027AN■ Block diagram

VCC

18ANTV

NC

27

NC

ANTOPEN

3+

Open thresholdsetting

Limit current
adjustment circuit

EXR
6

Short thresholdadjustment circuit

ANTSHORT

4+5GND■ Terminal functions

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No.

SymbolTerminal Function

1VCC

Power supply

2NC－3ANTOPEN

OPEN detect output (open collector output)

4ANTSHORT

Short-circuit detect output (open collector output)

5

GND

Ground6EXR

External resistor input

7NC－

8ANTV

Antenna power supply output

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GPS antenna diagnosis ICCA0027AN■ Equivalent circuit of input and output terminal
No.

SymbolI/O

Equivalent circuitExplanation

1VCC

IN－

Power supply pin

5GND

IN－Grounding pin

6EXR

IN

Input pin for external resistor
Short-circuit detection current,
limit current can be adjusted byconnecting external resister toGND.

3,4ANTOPEN
ANTSHORT

OUT

Output pin for detection
signals.
Open collector output.
Please be sure to connect
pull-up resistor of 10k ohm andabove to the power supply ofreceiving side.

8ANTVOUT

Output pin for antenna power
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GPS antenna diagnosis IC

CA0027AN■ Electrical characteristics
Measurement condition：Unless otherwise specified VCC = 5.0V，Ta =-40 to 105ºC
Item

Consumption current *Symbol

Condition

MINTYP

MAX

UNIT

ICC

While in normal operation of antenna,Antenna current = 20mA, EXR=4.7kΩ

5.0

10.0

15.0mA

6.0

12.018.0mA

7.5

15.0

22.5mA

ICCOP
ICCSH

When antenna is OPEN
Antenna current =0mA, EXR=4.7kΩ
When antenna is causing short-circuit
ANTV=0V, EXR=4.7kΩ

ANTOPEN detection current

Itho-

1.0

4.5

8.0mA

ANTSHORT detection current

Iths

EXR=4.7kΩ

30

40.050mA

L_level output current

IOL

VCC=3.0V, Vce=0.2V
ANTOPEN, ANTSHORT

0.7--mA

H_level leak current

IOH

VCC=5.5V, Vce=5.5V
ANTOPEN, ANTSHORT--1μA

Limit current

ILIM

EXR=4.7kΩ, ANTV=0V

38.5

55.0

71.5

mA

Antenna supply voltage

ANTV

Antenna current: 20mA

VCC
-0.37

VCC
-0.28

VCC
-0.19

V

*Not include antenna current■ Truth table of antenna connection status
Normal operationDetect OPENDetect SHORTANTOPENHL
H

ANTSHORT
H
H
L

NoteInrush current may flow from VCC to the ANTV terminal immediately after turning on the power supply.
Be careful because the inrush current temporarily makes SHORT detection state.
After turning on the power, the time for normal operation varies depending on the load capacitanceconnected to the ANTV terminal. Wait for 100 µs when load capacitance = 0.1 µF. If load capacitance = 1µF, wait 1 ms before reading the output.

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GPS antenna diagnosis ICCA0027AN■ Variation of short-circuit detection current with external resistor (reference data)・Calculation formula (Typ.)
ANTSHORT detection current = 280000/(4000+(8000×EXR[Ω])/(8000+EXR[Ω])) [mA]
Measurement condition VCC=5.0V, Ta=-40 to 105 ºC
External resistor
OPENANTSHORTMAX (-40 to 105°C)
31.3Detection current
TYP (25°C)
25.0
MIN (-40 to 105°C)
18.8

4.7kΩ
50.0
40.0
30.0

150Ω
84.4
67.5
50.60Ω
87.5
70.0
52.5

UNITmA

ANTSHORT detection current [mA]

ANTSHORT detection current vs external resistor
100.0
90.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0

MAXTYP
MIN

110100

1000

10000

100000External resistor [Ω]*The plots come near to the E6 line (1, 1.5, 2.2, 3.3, 4.7, 6.8).
■ Variation of limit current with external resistor (Reference data)
・ Calculation formula (Typ.)
Limit current = ANTSHORT detection current +(80000/(4000+(3000×EXR[Ω])/(3000+EXR[Ω]))) [mA]
Measurement condition VCC=5.0V, Ta=-40 to 105 ºC
External resistor
OPEN
Limit current
MAX (-40 to 105°C)
45.5
TYP (25°C)
35.0
MIN (-40 to 105°C)
24.5

4.7kΩ
71.5
55.0
38.5

150Ω
111.8
86.0
60.20Ω
117.0
90.0
63.0

Limit current vs external resistor

Limit current [mA]

120.0

MAX

100.0

TYP

80.0

MIN

60.0
40.0
20.00.01101001000

10000100000

External resistor [Ω]*The plots come near to the E6 line (1, 1.5, 2.2, 3.3, 4.7, 6.8).

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5UNITmA

GPS antenna diagnosis ICCA0027AN■ Antenna current-dependent properties of antenna supply voltage (reference data)
Measurement condition
Antenna current
Antenna supply voltage
VCC reference

VCC=5.0V, Ta=-40 to 105 ºC
10mA
MAX (-40 to 105°C)-0.120TYP (25°C)-0.180MIN (-40 to 105°C)-0.24020mA-0.190-0.280-0.37030mA-0.260-0.380-0.50050mA-0.410-0.580-0.750

Antenna supply voltage vs antenna current
0.000

MAX

Antenna supply voltage(VCC reference)[V]-0.100

TYP-0.200

MIN-0.300-0.400-0.500-0.600-0.700-0.800
01020

30

4050

Antenna current[mA]■ Output load resistance-dependent property of L_level output voltage (reference data)
Measurement condition

VCC=5.0V, Ta=25 ºC

L_level output voltage vs Output load resistance(Power supply of receivingside =5.0V)
L_level output voltage [V]

6.00
5.00
4.00
3.00
2.00
1.00
0.00
1101001000

Output load resistance [Ω]DS0310-7E

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UNITVGPS antenna diagnosis IC

CA0027AN■ Measurement circuit diagram

1VCC

ANTV

82NC

NC

71VCC

ANTV

82NC

NC

73ANTOPEN

EXR

64ANTSHORT

GND

5A
5V

0.1uF

0.1uF

5V

10kΩ

10kΩ

3ANTOPEN

EXR

6V

10kΩ

4ANTSHORT

GND

10kΩ

5V

消費電流
Consumption current

ANTOPEN検出電流、ANTSHORT検出電流
ANTOPEN detection current, ANTSHORT detection current

1VCC

ANTV

82NC

NC

3ANTOPEN

4ANTSHORT

1VCC

ANTV

872NC

NC

7EXR

63ANTOPEN

EXR

6GND

54ANTSHORTGND

50.1uF

3.0V

A

A

A

0.2V

0.1uF

5.5V

5.5V

0.2V

A
5.5V

L_レベル 出力電流
L_level output current

1VCC

H_レベル リーク電流
H_level leak current

ANTV

18VCC

ANTV

8A
5V

V
5V

0.1uF

2NC

NC

2NC

NC

73ANTOPEN

EXR

64ANTSHORT

GND

510kΩ

10kΩ

3ANTOPEN

EXR

610kΩ

10kΩ

4ANTSHORT

GND

5アンテナ供給電圧
Antenna supply voltage

リミット電流Limit current

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0.1uF

7Nov 13th, 20207

GPS antenna diagnosis ICCA0027AN■ Temperature characteristics(Measurement condition VCC=5.0V, Ta=-40~105 ºC, EXR=4.7kΩ)Consumption current at OPEN vs. Temperature
Consumption current at OPEN [mA]

Consumption current at normal [mA]

Consumption current at normal vs. Temperature
15.0

12.5

10.0

7.5

5.0
-40

-20

0

20

4060

80

100

18.0

15.0

12.0

9.0

6.0
-40

18.8

15.0

11.3

7.5
-40

-200

20

40

4060

80

1006080

100

8.0

6.3

4.5

2.8

1.0-40-200

Temperature [℃]20406080

10080

100

Temperature [℃]

ANTSHORT detection current vs. Temperature

Limit current vs. Temperature
71.5

Limit current [mA]

50.0

45.0

40.0

35.0

30.0

63.3

55.0

46.8

38.5-40-20020406080

100-40Temperature [℃]-0.190-0.235-0.280-0.325-0.370-40-20020406080

100

Temperature [℃]DS0310-7E

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Temperature [℃]

Antenna supply voltage vs. Temperature(VCC reference)
Antenna supply voltage [V](VCC reference)

20

ANTOPEN detection current vs. Temperature

22.5

ANTOPEN detection current [mA]

Consumption current at SHORT [mA]0Temperature [℃]Consumption current at SHORT vs. Temperature

ANTSHORT detection current [mA]-20

Temperature [℃]860GPS antenna diagnosis ICCA0027AN■ External dimensions

Package index♯1♯4

Unit: mm
単位／Unit：ｍｍ※not to scale♯5♯8DS0310-7E

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GPS antenna diagnosis ICCA0027AN■ Reference land pattern

Unit: mm
1is Copper wiring*not to scale
2 ※ indicates the dimension of the resist opening
3 The thickness of the resist film is equal to or thinner than the copper foil thickness

Note：Be sure to ensure heat dissipation performance by connecting
through via etc.

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10parts to GND of the board with aGPS antenna diagnosis ICCA0027AN

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Nov 13th, 202011