The AD8235 is the smallest and lowest power instrumentation amplifier in the industry. It is available in a 1.5 mm × 2.2 mm wafer level chip scale package (WLCSP). The AD8235 draws a maximum quiescent current of 40 μA. In addition, it draws a maximum 5...
The AD8235 is a 40 pA micropower instrumentation amplifier offered in an 11‑ball wafer‑level chip‑scale package (WLCSP). It operates from 1.8 V to 5.5 V and draws as little as 30 µA quiescent current, making it suitable for portable and battery‑powered medical and low‑side current‑sense applications.
Key features include a low input bias current of 50 pA, a typical CMRR of 110 dB at gain 100, rail‑to‑rail input and output, and a shutdown pin that reduces current to 500 nA. The device supports gain settings from 5 to 200 via a single external resistor and provides a short‑circuit limit of 55 mA.
| Supply Voltage Range | 1.8 V to 5.5 V |
|---|---|
| Quiescent Current | 30 µA typical, 40 µA max |
| Input Bias Current | 50 pA |
| Common‑Mode Rejection Ratio (CMRR) at G=100 | 110 dB |
| Gain Range | 5 to 200 |
| Short‑Circuit Limit | 55 mA |
| Operating Temperature Range | -40 °C to +125 °C |
The AD8235 operates from 1.8 V up to 5.5 V.
Typical quiescent current is 30 µA, with a maximum of 40 µA.
The input bias current is 50 pA.
At gain 100, the AD8235 provides a CMRR of 110 dB.