Key facts
- Brand
- Analog Devices
- Model
- AD8642
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-05-02
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Analog Devices AD8642 Product Handbook
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.
Analog Devices AD8642 specifications
| Supply current (typical) | 250 pA max |
|---|---|
| Input bias current | 1 pA max |
| Offset voltage | 750 pV max |
| Single‑supply voltage range | 5 V to 26 V |
| Dual‑supply voltage range | +2.5 V to +13 V |
| Output high voltage (1 mA load) | 4.95 V |
| Slew rate | 2 V/µs |
| Gain‑bandwidth product (AD8641/AD8642) | 3 MHz |
| Gain‑bandwidth product (AD8643) | 25 MHz |
| Voltage noise (0.1‑10 Hz) | 4.0 µV p‑p |
| Phase margin | 50 degrees |
All Analog Devices AD8642 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the maximum supply voltage the AD8642 can tolerate?
The absolute maximum supply voltage is 27.3 V.
What temperature range does the AD8642 operate in?
It operates from –40 °C to +125 °C.
What is the maximum supply voltage for the AD8641/AD8642/AD8643?
They operate from 5 V up to 26 V on a single supply, or from +2.5 V to +13 V on a dual supply.
What is the input bias current of these amplifiers?
The input bias current is as low as 1 pA (maximum).