AD8212 is a high common-mode voltage current shunt monitor that accurately amplifies a small differential input voltage in the presence of large common-mode voltages up to 65 V (>500 V with an external PNP transistor). The AD8212 is ideal for current monitoring across a shunt resistor.
The AD8212 is a high‑common‑mode voltage current shunt monitor that accurately amplifies a small differential input voltage in the presence of large common‑mode voltages. It offers adjustable gain, an integrated 5 V series regulator, and can operate from 7 V to 65 V normally, or above 500 V when used with an external PNP transistor.
The handbook provides full electrical specifications, absolute maximum ratings, pin descriptions, typical performance curves, and guidance on high‑voltage operation, making it a comprehensive reference for designers of motor controls, power supplies, battery monitors, and other current‑sensing applications.
| Supply Voltage (V+) | 7 V to 65 V (no external transistor), >500 V with external PNP |
|---|---|
| Supply Current (Isup) | 220 µA typical, 720 µA max (7 V–65 V) |
| Input Impedance (Differential) | 2 kΩ |
| Common‑Mode Voltage Range | 7 V to 65 V typical |
| Transconductance | 1000 µS |
| Operating Temperature Range | -40 °C to +125 °C |
| Noise (0.1 Hz–10 Hz) | 1.1 µV p‑p |
The AD8212 operates from 7 V to 65 V when no external pass transistor is used.
By adding an external high‑voltage breakdown PNP transistor, the common‑mode range can be extended to over 500 V.
The device is specified for temperatures from –40 °C to +125 °C.
Typical supply current is 220 µA, with a maximum of 720 µA.