MAX9937(2008) 데이터 시트보기 (PDF) - Maxim Integrated

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MAX9937
(Rev.:2008)

Automotive Current-Sense Amplifier with Reverse-Battery Protection

Maxim Integrated 

Automotive Current-Sense Amplifier

with Reverse-Battery Protection

ABSOLUTE MAXIMUM RATINGS

RSP, RSN to GND Voltage Continuous ..................-0.3V to +30V

RSP, RSN to GND Load-Dump Voltage Duration

(VBAT = 40V) with Typical Application Circuit .......................1s

RSP, RSN to GND Reverse-Battery Voltage Duration

(VBAT = -20V) with Typical Application Circuit........Continuous

Differential Input Voltage (RSP - RSN)................................±0.3V

VCC to GND ...........................................................-0.3V to +6.0V

OUT to GND ...............................................-0.3V to (VCC + 0.3V)

Output Short Circuit to Ground ..................................Continuous

Continuous Input Current into RSN, RSP* ........................±50mA

Continuous Input Current into OUT*.................................±25mA

Thermal Limits (Note 1)

5 SC70 Multiple-Layer PCB

Continuous Power Dissipation (TA = +70°C)

(derate 3.1mW/°C above +70°C) ............................246.9mW

θJA ...............................................................................324°C/W

θJC...............................................................................115°C/W

Operating Temperature Range .........................-40°C to +125°C

Junction Temperature ......................................................+150°C

Lead Temperature (soldering, 10s) .................................+300°C

Lead Temperature (reflow) ..............................................+260°C

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

*Junction temperature rating due to power dissipation must also be observed.

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VCC = 5V, VBAT = VRS+ = 12V, VSENSE = (VRS+ - VRS-) = 0, RRSP = RRSN = 500Ω, ROUT = 10kΩ, TA = -40°C to +125°C. Typical

values are at TA = +25°C, unless otherwise noted. See the Typical Application Circuit.) (Note 2)

PARAMETER

DC CHARACTERISTICS

Input Common-Mode Voltage

Range

Supply Voltage Range

Input Offset Voltage (Note 3)

Common-Mode Rejection Ratio

Power-Supply Rejection Ratio

Quiescent Supply Current

Input Bias Current (Note 4)

Input Bias Current Mismatch

Input Current in Shutdown

Voltage Gain

Voltage Gain Error (Notes 3, 5)

SYMBOL

CONDITIONS

VRSP,

VRSN

Inferred from CMRR test

VCC

VOS

CMRR

PSRR

ICC

IB+, IB-

ΔIB / IB

Inferred from PSRR test

TA = +25°C

TA = -40°C to +125°C

VBAT = +4V to +28V

TA = +25°C

TA = +125°C

VCC = +2.7V to +5.5V

VCC = 5V

TA = +25°C

TA = -40°C to +125°C

TA = +25°C

2 x (IB+ - IB-)/(IB++IB-) TA = -40°C to

+125°C

IRSP + IRSN

TA = +25°C, VCC = 0

TA = -40°C to +125°C, VCC = 0

Gain = ROUT/RRSP

TA = +25°C

TA = -40°C to +125°C

MIN TYP MAX UNITS

4

28

V

2.7

5.5

V

±0.3 ±1.2

mV

±1.6

100

120

dB

90

90

120

dB

20

55

µA

0.8

2

5.6

µA

0.65

6.5

±1

±12

%

±15

%

0.01

1

µA

10

20

V/V

±0.2 ±1.5

%

±2.0

2 _______________________________________________________________________________________

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