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LMP8272,LMP8277 High Common Mode, Gain of 14, Precision Voltage Difference Amplifiers
PRELIMINARY
January 2005
LMP8272, LMP8277 High Common Mode, Gain of 14, Precision Voltage Difference Amplifiers
General Description
The LMP™8272, LMP8277 are fixed gain differential amplifiers with a -2V to 27V input common mode voltage range and a supply voltage range of 4.5V to 5.5V. The LMP8272, LMP8277 are precision amplifiers which will detect, amplify and filter small differential signals in the presence of high common mode voltages. The gain is fixed at 14 and is adequate to drive an ADC to full scale in most cases. This fixed gain is achieved in two separate stages, a pre-amplifier with gain of +7 and a second stage amplifier with a gain of +2.