General Description

The MAX4291/MAX4292/MAX4294 family of micropower operational amplifiers operates from a 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supplies and has Rail-to-Rail® input/output capabilities. These amplifiers provide a 500kHz gain-bandwidth product and 120dB open-loop voltage gain while using only 100µA of supply current per amplifier. The combination of low input offset voltage (±200µV) and high open-loop gain makes them ideal for low-power/low-voltage, high-precision portable applications.

Features

♦ Ultra-Low Voltage Operation—Guaranteed Down to 1.8V

♦ 100µA Supply Current per Amplifier

♦ 500kHz Gain-Bandwidth Product

♦ 120dB Open-Loop Voltage Gain (RL = 100kΩ)

♦ 0.017 Total Harmonic Distortion Plus Noise (THD + N) at 1kHz

♦ Rail-to-Rail Input Common-Mode Range

♦ Rail-to-Rail Output Drives 2kΩ Load

♦ No Phase Reversal for Overdriven Inputs

♦ Unity-Gain Stable for Capacitive Loads up to 100pF

♦ 200µV Input Offset Voltage (MAX4292/MAX4294)

♦ Single in Small 5-Pin SC70

♦ Available in Ultra-Small Packages:

    5-Pin SC70 (MAX4291)

    8-Bump UCSP (MAX4292)

Applications

    2-Cell Battery-Operated Systems

    Portable Electronic Equipment

    Battery-Powered Instrumentation

    Digital Scales

    Strain Gauges

    Sensor Amplifiers

    Cellular Phones