AD8479ARZ-RL

The AD8479 is a precision difference amplifier with a very high input common-mode voltage range, capable of accurately measuring differential signals in the presence of common-mode voltages up to ±600 V. In applications where galvanic isolation is not required, the AD8479 can replace costly isolation amplifiers. The device operates over a ±600 V common-mode voltage range and provides up to ±600 V common-mode or differential transient voltage protection at the inputs. The AD8479 features low offset voltage, low offset voltage drift, low gain drift, low common-mode rejection drift, and excellent CMRR over a wide frequency range. The AD8479 is available in a space-saving 8-lead SOIC package and is rated for the −40°C to +125°C temperature range.

Applications

• High-voltage current sensing
• Battery cell voltage monitoring
• Power supply current monitoring
• Motor control
• Isolation

Key features

• Common-mode voltage range: ±600 V
• Rail-to-rail output
• Fixed gain: 1
• Wide supply range: ±2.5 V to ±18 V
• Supply current: 550 μA (typical)
• Excellent AC performance CMRR: 90 dB (minimum)
• Bandwidth: 130 kHz
• High-precision DC performance gain nonlinearity: 5 ppm (maximum)
• Offset voltage drift: 10 μV/°C (maximum)
• Gain drift: 5 ppm/°C (maximum)