General Description

The MAX4080/MAX4081 are high-side, current-sense amplifiers with an input voltage range that extends from

4.5V to 76V making them ideal for telecom, automotive, backplane, and other systems where high-voltage current monitoring is critical. The MAX4080 is designed for unidirectional current-sense applications and the MAX4081 allows bidirectional current sensing.

Features

♦Wide 4.5V to 76V Input Common-Mode Range

♦Bidirectional or Unidirectional ISENSE

♦Low-Cost, Compact, Current-Sense Solution

♦Three Gain Versions Available

5V/V (MAX4080F/MAX4081F)

20V/V (MAX4080T/MAX4081T)

60V/V (MAX4080S/MAX4081S)

♦±0.1 Full-Scale Accuracy

♦Low 100µV Input Offset Voltage

♦Independent Operating Supply Voltage

♦75µA Supply Current (MAX4080)

♦Reference Input for Bidirectional OUT (MAX4081)

♦Available in a Space-Saving, 8-Pin µMAX Package

Applications

Automotive (12V, 24V, or 42V Batteries)

48V Telecom and Backplane Current Measurement

Bidirectional Motor Control

Power-Management Systems

Avalanche Photodiode and PIN-Diode Current Monitoring

General System/Board-Level Current Sensing

Precision High-Voltage Current Sources