AD629 Amplifier IC Chip

AD629(High Common-Mode Voltage,Difference Amplifier)

Introduction

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.

The AD629 can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device operates over a ±270V common- mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±500 V.

The part has low offset, low offset drift, low gain error drift,low common-mode rejection drift, and excellent CMRR over a wide frequency range.

The AD629 is available in die and packaged form featuring 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 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

Appearance