The AD8235 is a low-power, low-noise, low-input-offset-voltage instrumentation amplifier with high common-mode rejection ratio and high gain accuracy. The device is available in a 1.5 mm × 2.2 mm wafer-level chip scale package (WLCSP), making it ideal for space-constrained applications such as medical instrumentation, low-side current sensing, and portable electronics.
This document provides a complete description of the AD8235 micropower instrumentation amplifier, including its low‑power operation (40 µA quiescent current), shutdown capability, and rail‑to‑rail input/output. It lists the device’s features, typical applications such as medical instrumentation and low‑side current sensing, and gives design guidelines.
The datasheet contains detailed specifications, absolute maximum ratings, pin‑out diagrams, typical performance graphs, and layout recommendations. It also includes application notes for AC‑coupled instrumentation and low‑power heart‑rate monitoring circuits, as well as ordering information for the 11‑ball WLCSP package.
| Supply Voltage Range | 1.8‑5.5 V |
|---|---|
| Quiescent Current | 30‑40 µA |
| Shutdown Current | 6‑500 nA |
| Input Bias Current | 50 pA |
The absolute maximum supply voltage is 6 V.
The shutdown current can be as low as 6 nA, with a maximum of 500 nA.
The typical input bias current is 50 pA.