GENERAL DESCRIPTION

The AD629 is a difference amplifier with a very high input, common-mode voltage range. It is a precision device that allows the user to accurately measure differential signals in the presence of high common-mode voltages up to ±270 V.

FEATURES

Improved replacement for: INA117P and INA117KU

±270 V common-mode voltage range

Input protection to

±500 V common mode

±500 V differential mode

Wide power supply range (±2.5 V to ±18 V)

±10 V output swing on ±12 V supply

1 mA maximum power supply current

HIGH ACCURACY DC PERFORMANCE

3 ppm maximum gain nonlinearity (AD629B)

20 μV/°C maximum offset drift (AD629A)

10 μV/°C maximum offset drift (AD629B)

10 ppm/°C maximum gain drift

EXCELLENT AC SPECIFICATIONS

77 dB minimum CMRR @ 500 Hz (AD629A)

86 dB minimum CMRR @ 500 Hz (AD629B)

500 kHz bandwidth

APPLICATIONS

High voltage current sensing

Battery cell voltage monitors

Power supply current monitors

Motor controls

Isolation