The AD625 is a monolithic instrumentation amplifier that provides user‑programmed gains from 1 to 10 000 with low gain error (0.02 % max) and low noise (4 nV/√Hz at 1 kHz). It is available in several accuracy grades (A, B, C, J, K, S) covering industrial, commercial, and extended temperature ranges.
The device is supplied in 16‑lead ceramic or plastic DIP packages and a 20‑terminal leadless chip carrier. Key electrical characteristics include a 25 MHz gain‑bandwidth product, a +6 V to +18 V supply range, and a quiescent current of 3.5 mA (typ). The datasheet also provides ordering information, pin‑out diagrams, and input‑protection guidelines.
| Gain range | 1 to 10 000 |
|---|---|
| Gain error (typical) | 0.02 % max |
| Input voltage noise | 4 nV/√Hz at 1 kHz |
| Gain‑bandwidth product | 25 MHz |
| Package options | 16‑Lead Ceramic DIP, 16‑Lead Plastic DIP, 20‑Terminal LCC |
The AD625 can be programmed for gains from 1 to 10 000.
The typical input voltage noise is 4 nV/√Hz at 1 kHz.