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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 100?V Input Offset Voltage

?Independent Operating Supply Voltage

?75?A Supply Current (MAX4080)

?Reference Input for Bidirectional OUT (MAX4081)

?Available in a Space-Saving, 8-Pin ?MAX 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