AD8638/AD8639 are 16 V auto-zero, Rail-to-Rail output operational amplifiers with low noise and high performance.
The AD8638 (single) and AD8639 (dual) are low‑noise, auto‑zero amplifiers that operate from 5 V to 16 V single‑supply or ±2.5 V to ±8 V dual‑supply. They provide rail‑to‑rail output swing, high gain (≈136 dB), high CMRR (≈133 dB) and low input bias current (≈40 pA). The devices are specified for an extended industrial temperature range (‑40 °C to +125 °C) and the AD8639 is qualified for automotive applications.
The datasheet includes pin configurations for several packages (5‑lead SOT‑23, 8‑lead SOIC, MSOP, LFCSP), absolute maximum ratings, thermal resistance data, typical performance curves, and an ordering guide that lists automotive‑grade part numbers. Detailed electrical characteristics are given for both 5 V and 16 V supply conditions.
| Offset Voltage (typical) | 9 µV |
|---|---|
| Input Bias Current (typical) | 40 pA |
| Supply Current per Amplifier (typical) | 1.3 mA |
| CMRR (typical) | 133 dB |
| PSRR (typical) | 143 dB |
The typical offset voltage is 9 µV.
Each amplifier draws about 1.3 mA of supply current under typical conditions.
The input bias current is typically 40 pA.
Yes, the AD8639 models are qualified for automotive applications.