Analog Devices Inc. AD8479 Precision Difference Amplifier 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.
±600V common-mode voltage range
Fixed gain of 1
Wide power supply range of ±2.5V to ±18V
550μA typical power supply current
90dB minimum CMRR
Excellent AC specifications
High accuracy dc performance
5ppm maximum gain nonlinearity
10μV/°C maximum offset voltage drift
5ppm/°C maximum gain drift
High voltage current sensing
Battery cell voltage monitors
Power supply current monitors
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Small, environmental friendly system for testing and formation rechargeable battery cells & packs.