The AD8203 is a single-supply difference amplifier for amplifying and low-pass filtering small differential voltages in the presence of a large common-mode voltage (CMV). It features high common-mode voltage range, excellent AC and DC performance, etc.
The AD8203 is a single‑supply difference amplifier offering a high common‑mode voltage range of –6 V to +30 V and a fixed gain of 14. It operates over a wide temperature range (‑40 °C to +125 °C) and is supplied from 3.5 V to 12 V, making it suitable for automotive platforms such as transmission control and engine management.
The device includes an externally accessible 100 kΩ resistor for low‑pass filtering and gain adjustment, provides a minimum CMRR of 80 dB up to 10 kHz, and features low input offset (≈1 mV) and low input bias current (≈40 nA). Absolute maximum ratings specify a supply voltage limit of 12.5 V and a continuous common‑mode voltage limit of 35 V.
| Supply voltage range | 3.5 V to 12 V |
|---|---|
| Operating temperature range | -40°C to +125°C |
| Fixed system gain | 14 |
| CMRR (minimum) | 80 dB (dc to 10 kHz) |
| Input voltage offset | +1 mV (8‑lead SOIC) |
| Common‑mode voltage range | -6 V to +30 V |
| Maximum supply voltage (damage limit) | 12.5 V |
The device supports a continuous common‑mode voltage from –6 V to +30 V.
The AD8203 provides a fixed system gain of 14.
It operates from 3.5 V up to 12 V.
Voltages above 12.5 V may cause permanent damage.