AD629 is a difference amplifier with high common-mode voltage range, wide power supply range, and high accuracy DC performance. This amplifier is suitable for applications such as high voltage current sensing, battery cell voltage monitoring, power supply current monitoring, motor control, and isolation.
The AD629 is a precision difference amplifier that supports a very high input common‑mode voltage range of up to +270 V, allowing accurate differential measurements even in the presence of large common‑mode signals. It offers low offset drift (as low as 10 pV/°C) and high CMRR, making it suitable for battery monitoring, motor control, isolation‑free applications, and more.
The device is offered in 8‑lead PDIP and 8‑lead SOIC packages, operates from a +2.5 V to +18 V supply, and is specified for industrial temperature ranges (‑40 °C to +85 °C). The datasheet provides full electrical specifications, absolute maximum ratings, typical performance curves, and an ordering guide for the various package options.
| Gain Error | 0.01 % – 0.05 % |
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No, the AD629 can replace isolation amplifiers in applications that do not need galvanic isolation.