AD629BRZ-RL

高共模电压，差分放大器 High Common-Mode Voltage, Difference Amplifier

Product Details

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 ±270 V common-mode voltage range and has inputs that are protected from common-mode or differential mode transients up to ±500 V.

The AD629 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 low cost, 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.

**Applications**

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High voltage current sensing

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Battery cell voltage monitors

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Power supply current monitors

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Motor controls

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Isolation

### Features and Benefits

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Improved replacement for: INA117P and INA117KU

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±270 V common-mode voltage range

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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

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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

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EXCELLENT AC SPECIFICATIONS

77 dB minimum CMRR @ 500 Hz AD629A

86 dB minimum CMRR @ 500 Hz AD629B

500 kHz bandwidth