The AD8212 is a high common-mode voltage, current shunt monitor with adjustable gain. It is ideal for current shunt measurement, motor controls, DC-to-DC converters, power supplies, battery monitoring, and remote sensing applications.
The AD8212 is a high common-mode voltage current shunt monitor that accurately amplifies small differential input voltages in the presence of large common-mode voltages up to 65 V, or greater than 500 V with an external pass transistor. It features an integrated 5 V series regulator and an adjustable gain set by an external resistor, making it ideal for current monitoring across shunt resistors in applications controlling loads like motors and solenoids.
The device operates with a supply voltage range of 7 V to 65 V in normal mode, with a typical common-mode voltage range of 7 V to 65 V. For high-voltage applications, an external PNP transistor extends the common-mode range to over 500 V. The output current is proportional to the input differential voltage and can be converted to a voltage using an external resistor.
| Supply Voltage (Normal Operation) | 7 V to 65 V |
|---|---|
| Operating Temperature Range | -40°C to +125°C |
| Input Impedance (Differential) | 2 kΩ |
| Transconductance | 1000 µA/V |
| PSRR | 80 dB |
The typical common-mode voltage range is 7 V to 65 V.
Operation at several hundred volts is achieved by using an external high voltage breakdown PNP transistor.
The output voltage is calculated as VOUT = (VSENSE × ROUT)/1000.