AD8231 is a digitally programmable instrumentation amplifier from Analog Devices with zero drift, high input impedance, wide bandwidth and high gain accuracy. It is suitable for pressure and strain transducers, thermocouples and RTDs, programmable instrumentation, industrial controls and weighing scales.
The AD8231 is a low‑drift, rail‑to‑rail instrumentation amplifier designed for precision sensing over a wide temperature range. It is suited for pressure and strain transducers, thermocouples, RTDs, programmable instrumentation, industrial controls, and weigh scales.
Key features include digitally/pin programmable gain (1‑128), shutdown mode with 1 µA max current, an uncommitted op‑amp, and rail‑to‑rail input/output. The datasheet provides full electrical specifications, pin configuration, absolute maximum ratings, and performance curves for both the instrumentation and op‑amp sections.
| Gain options | 1, 2, 4, 8, 16, 32, 64, 128 |
|---|---|
| Input offset voltage | 15 µV |
| Input bias current (max) | 500 pA |
| CMRR (G=1) | 80 dB |
| Bandwidth (G=1) | 2.7 MHz |
| Quiescent current (typical) | 5 mA |
In shutdown the device reduces current to a maximum of 1 µA.
It operates from 3 V to 6 V on a single supply or from +1.5 V to +3 V on a dual supply.
Typical input bias current is 250 pA, with a maximum of 500 pA.
The device can source up to 70 mA in a short‑circuit condition.