LMP8640 - National Semiconductor

LMP8640 Precision High Voltage Current Sense Amplifier

The LMP8640 and the LMP8640HV are precision current sense amplifiers that detect small differential voltages across a sense resistor in the presence of high input common mode voltages with a supply voltage range from 2.7V to 12V. The LMP8640 accepts input signals with common mode voltage range from -2V to 42V, while the LMP8640HV accepts input signal with co.

Features

Typical values, TA = 25°C
■ High common-mode voltage range -2V to 42V — LMP8640 -2V to 76V — LMP8640HV 2.7V to 12V
■ Supply voltage range 20V/V; 50V/V; 100V/V
■ Gain options 0.25%
■ Max gain error 900µV
■ Low offset voltage 13 μA
■ Input bias current 85 dB
■ PSRR 103 dB
■ CMRR (2.1V to 42V) -40°C to 125°C
■ Temperature range
■ 6-Pin TSOT Package Applications
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■ High-side current sense Vehicle current measurement Motor controls Battery monitoring Remote sensing Power management Typical Application 30071462 LMP™ is a trademark of National Semiconductor Corporation. © 2010 National .