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General Description

The MAX4289 micropower, operational amplifier is optimized for ultra-low supply voltage operation. The amplifier consumes only 9μA of quiescent supply current and is fully specified for operation from a single 1.0V to 5.5V power supply. This ultra-low voltage operation together with the low quiescent current consumption make the MAX4289 ideal for use in battery-powered systems operated from as little as a single alkaline cell. The MAX4289 also features a wide input common-mode range that includes the ground, and an output voltage swing that is virtually Rail-to-Rail?, allowing almost all of the power supply to be used for signal voltage.

Features

? Ultra-Low Voltage Operation: Guaranteed Specifications from 1.0V to 5.5V

? Input Common-Mode Range: 0 to (VCC - 0.2V)

? Ultra-Low Power Consumption: 9μA Supply Current (typ)

? Optimized for Operation from Single-Cell Battery-Powered Systems

? Compatible with 3.0V and 5.0V Single-Supply Systems

? Low Offset Voltage: 0.2mV

? Low Input Bias Current: 5nA

? High Open-Loop Voltage Gain: 90dB

? Rail-to-Rail Output Stage Drives 5k? Load

? No Output Phase Reversal for Overdriven Inputs

? Available in a Tiny 6-Pin SOT23 (3mm ? 3mm)

Applications

??? Single-Cell Systems

??? Portable Electronic Equipment

??? Battery-Powered Instrumentation

??? Hearing Aids Using Zinc Air Battery

??? Strain Gauges

??? Cellular Phones

??? Notebook Computers

??? Sensor Amplifiers

??? Portable Communication Devices