MAX9937AXKT データシートの表示（PDF） - Maxim Integrated

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MAX9937AXKT

Current-Sense Amplifier with Reverse-Battery Protection

Maxim Integrated 

MAX9937

Current-Sense Amplifier with

Reverse-Battery Protection

General Description

The MAX9937 is a tiny current-sense amplifier designed

for unidirectional high-side current-sense applications.

This device addresses major areas of concern for various

applications including load-dump protection up to +40V,

reverse-battery protection, and filtering for EMI and tran-

sient performance.

The MAX9937 also features a low input offset voltage of

±1.2mV (max) at +25°C with a low temperature drift of just

1µV/°C (typ).

The MAX9937 is available in a 5-pin SC70 package and is

rated over the -40°C to +125°C temperature range.

Applications

●● Battery Current Sense

●● Fuse Box Current Sense

●● ECU Current Monitor

Features

●● Reverse Battery and Load-Dump Protection

-20V to +40V

●● +4V to +28V Input Common-Mode Range

●● Flexible EMI Filtering

●● Low VOS: ±1.2mV (max)

●● Low VOS Drift : 1µV/°C (typ)

●● 20µA Supply Current

●● 350kHz, 3dB Small-Signal Bandwidth

Ordering Information

PART

TEMP RANGE

PIN-

TOP

PACKAGE MARK

MAX9937AXK+T -40°C to +125°C 5 SC70

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

+ATB

Pin Configuration appears at end of data sheet.

Typical Application Circuit

RS+ RSENSE RS-

VBAT = 4V

TO 28V

RRSP

499Ω

RSP

GND

RRSN

499Ω

RSN

VCC

LOAD

5V

BIAS

BLOCK

MICROCONTROLLER

MAX9937

OUT

GAIN

= VOUT =

VSENSE

ROUT

RRSP

ROUT

ADC

10kΩ

19-4233; Rev 1; 9/14

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