The AD8212 is a high common-mode voltage current shunt monitor with adjustable gain and a high common-mode voltage range. It is suitable for current shunt measurement, motor controls, DC-to-DC converters, power supplies, battery monitoring, and remote sensing.
The AD8212 high‑voltage current shunt monitor amplifies a small differential voltage while tolerating large common‑mode voltages up to 65 V (or >500 V with an external PNP transistor). It provides a current‑output proportional to the input differential voltage and includes an integrated 5 V series regulator in an 8‑lead MSOP package.
Typical applications include current shunt measurement for motor controls, DC‑DC converters, power supplies, battery monitoring and remote sensing. The device features a patented output base‑current compensation circuit for accurate operation across temperature and voltage ranges.
| Supply Voltage (V+) | 7 V – 65 V (no external transistor); 7 V – >500 V with external PNP |
|---|---|
| Supply Current (I_SUPPLY) | 220 pA – 720 pA (7 V–65 V range) |
| Input Impedance (Differential) | 2 kΩ |
| Common‑Mode Voltage Range | V+ = 7 V–65 V (5 MΩ) |
| Maximum Differential Input Voltage | 500 mV |
| Vsense Pin Current | 100 nA – 200 nA (7 V–65 V) |
| Transconductance | 1000 pA |
| Operating Temperature Range | -40 °C to +125 °C |
The device operates from 7 V to 65 V without an external transistor, and up to more than 500 V when an external PNP transistor is used.
It is specified for operation from –40 °C to +125 °C.
The Vsense pin can source between 100 nA and 200 nA when V+ is between 7 V and 65 V.
The maximum differential input voltage is 500 mV.