AD8479 Datasheet

• ±600 V common-mode voltage range
• Rail-to-rail output
• Fixed gain of 1
• Wide power supply range of ±2.5 V to ±18 V
• 550 μA typical power supply current
• Excellent ac specifications
  • 90 dB minimum CMRR
  • 310 kHz bandwidth
• High accuracy dc performance
  • ±5 ppm maximum gain nonlinearity
  • ±10 µV/°C maximum offset voltage drift
  • ±5 ppm/°C maximum gain drift
• Military temperature range (−55°C to +125°C)
• Controlled manufacturing baseline
• One assembly/test site
• One fabrication site
• Product change notification
• Qualification data available on request
• A62/19619 VID DSCC Drawing Number

• High voltage current sensing
• Battery cell voltage monitors
• Power supply current monitors
• Motor controls
• Isolation

The AD8479 is a difference amplifier with a very high input common-mode voltage range. The AD8479 is a precision device that allows the user to accurately measure differential signals in the presence of high common-mode voltages up to ±600 V.

The AD8479 can replace costly isolation amplifiers in applications that do not require galvanic isolation. The device operates over a ±600 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±600 V.

The AD8479 has low offset voltage, low offset voltage drift, low gain drift, low common-mode rejection drift, and excellent common-mode rejection ratio (CMRR) over a wide frequency range.

The AD8479 is available in a space-saving 8-lead SOIC package and is operational over the −40°C to +125°C temperature range.