The AD8205 is a single-supply system difference amplifier that is ideal for high-side current sensing applications.
The AD8205 is a single‑supply difference amplifier designed for high‑side current‑sense applications. It offers a wide common‑mode voltage range (‑2 V to +65 V), a fixed gain of 50 V/V, and excellent AC/DC performance with low offset drift and high CMRR.
Typical uses include motor‑control current sensing, diesel‑injection control, and H‑bridge motor control. The device can be configured for unidirectional, ground‑referenced, V+‑referenced, or bidirectional operation by adjusting the VREF pins, and automotive‑qualified versions are available.
| Gain | 50 V/V |
|---|---|
| Input common‑mode voltage range | ‑2 V to +65 V |
| Operating temperature range (Y/W grade) | ‑40 °C to +125 °C |
| Operating temperature range (H grade) | ‑40 °C to +150 °C |
| Supply voltage range | 4.5 V to 10 V (absolute max 12.5 V) |
| Quiescent current | < 2 mA |
| Offset drift | 15 µV/°C |
The typical single‑supply voltage is 5 V.
By applying voltage to the VREF1 and VREF2 pins, the output can be set anywhere from 0.05 V to 4.8 V.
It supports a common‑mode voltage range from ‑2 V to +65 V.
Yes, automotive‑grade models (AD8205WYRZ and AD8205WHRZ) are available and qualified for automotive use.