The AD629AR 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.
The AD629AR can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device operates over a ±270 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±500 V.
The AD629AR has low offset, low offset drift, low gain error drift, low common-mode rejection drift, and excellent CMRR over a wide frequency range.
The AD629AR is available in low cost, 8-lead PDIP and 8-lead SOIC packages. For all packages (including die) and grades, performance is guaranteed over the industrial temperature range of −40°C to +85°C.
Feature
Improved replacement for: INA117P and INA117KU
±270 V common-mode voltage range
Input protection to±500 V common mode ±500 V differential modeWide 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
(Picture: Diagram)
Catalogue
FPGA / CPLD
Memory
MOS 
MCU 
DSP
OCEP
Secondary 
Other 
