AD8641/AD8642/AD8643 are low power, precision JFET input amplifiers featuring extremely low input bias current and rail-to-rail output. They are suitable for line/battery-powered instruments, photodiode amplifiers, precision current sensing, medical instrumentation, industrial controls, precision filters, and portable audio applications.
The AD8642 is a low‑power, precision JFET input amplifier featuring rail‑to‑rail output and extremely low input bias current. It is designed for single‑supply systems and can drive capacitive loads over 500 pF, making it suitable for instruments, photodiode amplifiers, medical devices, and industrial controls.
The document provides detailed specifications, pin configurations for multiple package options, typical performance curves, and an ordering guide covering MSOP and SOIC variants. Absolute maximum ratings, thermal resistance data, and revision history are also included.
| Output Voltage High (Voh) typical | 4.95 V |
|---|---|
| Slew Rate | 2 V/µs |
The absolute maximum supply voltage is 27.3 V.
It operates from –40 °C to +125 °C.
The AD8642 is offered in 8‑lead MSOP (RM‑8) and 8‑lead SOIC (R‑8) packages.