AD8628/AD8629 is a single-supply, rail-to-rail input/output operational amplifier from Analog Devices, with ultra-low noise, low drift, rail-to-rail input and output range, 5V single-supply operation, high gain, CMRR, PSRR, very low input bias current, low supply current, fast overload recovery time and no external components required. It is mainly used in automotive sensors, pressure and position sensors, strain gauge amplifiers, medical instrumentation, thermocouple amplifiers, precision current sensing and photodiode amplifier applications.
The AD8628 and AD8629 are auto‑zero operational amplifiers offering ultra‑low offset voltage, drift, and input bias current. They operate from 2.7 V to 5 V single supply (or ±1.35 V to ±2.5 V dual supply) and provide rail‑to‑rail input and output swings, making them suitable for automotive sensors, pressure and position sensing, strain‑gage amplification, medical instrumentation, and precision current‑sensing applications.
Key specifications include a typical offset voltage of 5 µV, input bias current of 100 pA, CMRR of 120 dB, PSRR of 115 dB, supply current around 1 mA, slew rate of 1 V/µs, and a gain‑bandwidth product of 2.5 MHz. The devices are offered in several small‑outline packages such as 5‑lead TSOT‑23, SOT‑23, 8‑lead SOIC, and MSOP.
| Offset Voltage (typical) | 5 µV |
|---|---|
| Input Bias Current (typical) | 100 pA |
| Slew Rate (typical) | 1.0 V/µs |
| Gain‑Bandwidth Product | 2.5 MHz |
The typical offset voltage is 5 µV.
They are offered in 5‑lead TSOT‑23, 5‑lead SOT‑23, 8‑lead SOIC, and 8‑lead MSOP packages.