General Description

The single MAX4036/MAX4037 and dual MAX4038/MAX4039 operational amplifiers operate from a single +1.4V to +3.6V (without reference) or +1.8V to +3.6V (with reference) supply and consume only 800nA of supply current per amplifier, and 1.1µA for the optional reference. The MAX4036/MAX4038 feature a common-mode input voltage range from 0V to VDD - 0.4V at VDD = 1.4V. The MAX4037/MAX4039 feature a 1.232V voltage reference capable of sourcing 100µA and sinking 20µA.

Features

♦ Ultra-Low 800nA per Amplifier Supply Current

♦ Ultra-Low 1.4V Supply Voltage Operation (1.8V for

    MAX4037/MAX4039)

♦ Rail-to-Rail Outputs Drive 5kΩ and 5000pF Load

♦ 1.232V ±0.5, 120ppm/°C (max) Reference

    (MAX4037/MAX4039)

♦ No External Reference Bypass Capacitor

    Required

♦ No Phase Reversal for Overdriven Inputs

♦ Low 1.0pA (typ) Input Bias Current

♦ Low 200μV Input Offset Voltage

♦ Unity-Gain Stable

♦ Available in Tiny UCSP, SC70, SOT23, TDFN, and

    μMAX Packages

♦ Available in -40°C to +125°C Temperature Range

    (MAX4036A/MAX4038A)

Applications

    Battery-Powered/Solar-Powered Systems

    Portable Medical Instrumentation

    Pagers and Cell Phones

    Micropower Thermostats and Potentiostats

    Electrometer Amplifiers

    Remote Sensor Amplifiers

    Active Badges

    pH Meters