General Description

The MAX4208/MAX4209 ultra-low offset and drift instrumentation amplifiers feature exceptional precision specifications, low power consumption, rail-to-rail output, excellent gain-bandwidth product, and buffered REFIN/MODE input in a very small µMAX® package. These devices use a patented † spread-spectrum, autozeroing technique that constantly measures and corrects the input offset, eliminating drift over time and temperature and the effect of 1/f noise. This technique achieves less than 20µV offset voltage, allows ground sensing capability, provides ultra-low CMOS input bias current and increased common-mode rejection performance.

Features

♦ Ultra-Low Input Offset Voltage ±20µV (max) at +25°C

♦ ±0.25 (max) Gain Error

♦ Low 0.2µV/°C Offset Voltage Drift

♦ 1pA CMOS Input Bias Current

♦ True Ground Sensing with Rail-to-Rail Output

♦ Buffered REF Input for High Accuracy and Bipolar Operation

♦ 2.85V to 5.5V Single-Supply Operation (or ±1.425V to ±2.75V Dual Supplies)

♦ 750µA Supply Current

♦ 1.4µA Shutdown Mode

♦ 750kHz Gain-Bandwidth Product

♦ Operate Over the -40°C to +125°C Automotive Temperature Range

♦ Tiny 8-Pin µMAX Package