AD8216:  High Bandwidth, Bidirectional 65 V Difference Amplifier

The AD8216 is a single-supply, difference amplifier ideal for amplifying small differential voltages in the presence of large common-mode voltages. The operating input common-mode voltage range extends from −4 V to +65 V. The typical supply voltage is 5 V. The AD8216 features a 3 MHz bandwidth, allowing for the input-to-output propagation delay that is always less than 150 ns. This feature is ideal for applications monitoring rapidly increasing and decreasing load currents.

The AD8216 is offered in a SOIC package. The operating temperature range is −40°C to +125°C.

Excellent ac and dc performance over temperature keep errors in the measurement loop to a minimum. Offset and gain drift are guaranteed to a maximum of 20 μV/°C and 15 ppm/°C, respectively.

The output offset can be adjusted from 0.06 V to 4.9 V with a 5 V supply by using the V_REF1 pin and the V_REF2 pin. With the V_REF1 pin attached to the V+ pin and the V_REF2 pin attached to the GND pin, the output is set at half scale. Attaching both V_REF1 and V_REF2 to GND causes the output to be unipolar, starting near ground. Attaching both V_REF1 and V_REF2 to V+ causes the output to be unipolar, starting near V+. Other offsets can be obtained by applying an external voltage to V_REF1 and V_REF2.

Applications

• High-side current sensing in
DC-to-dc converters
Motor controls
Transmission controls
Diesel-injection controls
Engine management
Suspension controls
Vehicle dynamic controls