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MAX9937

Automotive Current-Sense Amplifier with Reverse-Battery Protection

Current-Sense Amplifier with Reverse-Battery and Load-Dump Protection from -20V to +40V

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

The MAX9937 is a tiny automotive grade current-sense amplifier designed for unidirectional high-side current-sense applications. This device addresses major areas of concern for automotive applications including load-dump protection up to +40V, reverse-battery protection, and filtering for EMI and transient 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.

Data Sheet

Download	Rev 0	(PDF, 264kB)
E-Mail

An evaluation kit is available: MAX9937EVKIT

Key Features

Reverse Battery and Load-Dump Protection
- -20V to +40V
+4V to +28V Input Common-Mode Range
Flexible EMI Filtering
Low V_OS: ±1.2mV (max)
Low V_OS Drift: 1µV/°C (typ)
20µA Supply Current
350kHz, 3dB Small Signal Bandwidth

Applications/Uses

Automotive Battery Current Sense
ECU Current Monitor
Fuse Box Current Sense

Key Specifications:

Current Sense Amplifiers

Part Number

CMVR
(V)

V_CC
(V)

I_CC
(µA)

Bi-Dir. Curr. Sense

V_OS @25°C
(µV)

Gain

Gain Accuracy @25°C
(%)

BW
(kHz)

Comp-
arators

Oper. Temp.
(°C)

Package/Pins

Budgetary Price

min

max

min

max

typ

max

@ -3dB

See Notes

MAX9937

2.7

5.5

1200

Adj.

1.5

350

-40 to +125

SC70/5

$0.65 @1k

See All Current Sense Amplifiers (36)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Typical Operating Circuit

More Information

Topmark Coding	MAX9937
New Product Press Release	[ 2008-11-13 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Document Ref.: 19-4233 Rev 0; 2008-08-15
This page last modified: 2009-01-08