General Description
The MAX5812 is a single, 12-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 power-down mode decreases current consumption to less than 1µA. The MAX5812 features three software-selectable power-down output impedances: 100kΩ, 1kΩ, and high impedance. Other features include an internal precision Rail-to-Rail® output buffer and a power-on reset circuit that powers up the DAC in the 100kΩ 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 100kΩ, 1kΩ, 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