AD8479BRZ

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

Applications

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

Key features

• ±600V common- mode voltage range
• Rail- to- rail output
• Fixed gain of 1
• Wide power supply range of ±2.5V to ±18V
• 550μA typical power supply current
• Excellent ac specifications
• 90 dB minimum CMRR
• 310kHz bandwidth
• High accuracy dc performance
• 5 ppm maximum gain nonlinearity
• 10μV/°C maximum offset voltage drift
• 5ppm/°C maximum gain drift