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