The document describes the AD8220 JFET Input Instrumentation Amplifier with Rail-to-Rail Output. It features low input currents, high CMRR, excellent ac specifications, and low power consumption.
The AD8220 instrumentation amplifier from Analog Devices is offered in an MSOP package and operates from a single 5 V supply up to 18 V dual supply. It features rail‑to‑rail output, low input bias current (10 pA typical) and high common‑mode rejection (up to 100 dB). The device is suited for portable, battery‑powered instrumentation, medical data acquisition and transducer interfaces.
The datasheet provides detailed specifications, pin configuration, typical performance curves, and application notes such as AC‑coupled instrumentation and ECG signal conditioning. It also includes absolute maximum ratings, ESD protection guidelines, and layout recommendations for optimal performance.
| Supply Voltage Range | +2.25 V to +18 V (single) / ±2.25 V to ±18 V (dual) |
|---|---|
| Quiescent Current | 750 µA |
| Input Bias Current (typical) | 10 pA |
| Bandwidth (G=1) | 1.5 MHz |
| Slew Rate | 2 V/µs |
| Output Swing (RL=2 kΩ, ±18 V supply) | ‑14.3 V to +14.3 V |
The device can be powered up to +18 V (single‑supply) or ±18 V (dual‑supply).
The AD8220 draws a typical quiescent current of 750 µA.
The typical input bias current is 10 pA.
At a gain of 1, the AD8220 has a bandwidth of 1.5 MHz.