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General Description

The MAX5811 is a single, 10-bit voltage-output digital-to-analog converter (DAC) with an I2C?-compatible 2-wire interface that operates at clock rates up to 400kHz. The device operates from a single 2.7V to 5.5V supply and draws only 100μA at VDD = 3.6V. A low-power powerdown mode decreases current consumption to less than 1μA. The MAX5811 features three software-selectable power-down output impedances: 100k?, 1k?, and high impedance. Other features include an internal precision Rail-to-Rail? output buffer and a power-on reset (POR) circuit that powers up the DAC in the 100k? power-down mode.

Features

? Ultra-Low Supply Current

??? 100μA at VDD = 3.6V

??? 130μA at VDD = 5.5V

? 300nA Low-Power Power-Down Mode

? Single 2.7V to 5.5V Supply Voltage

? Fast 400kHz I2C-Compatible 2-Wire Serial Interface

? Schmitt-Trigger Inputs for Direct Interfacing to Optocouplers

? Rail-to-Rail Output Buffer Amplifier

? Three Software-Selectable Power-Down Output Impedances

??? 100k?, 1k?, and High Impedance

? Read-Back Mode for Bus and Data Checking

? Power-On Reset to Zero

? Miniature 6-Pin SOT23 Package

Applications

??? Digital Gain and Offset Adjustments

??? Programmable Voltage and Current Sources

??? Programmable Attenuation

??? VCO/Varactor Diode Control

??? Low-Cost Instrumentation

??? Battery-Operated Equipment