The MAX5822 is a dual, 12-bit, voltage-output, digital-toanalog 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 115A at VDD = 3.6V. A power-down mode decreases current consumption to less than 1A. The MAX5822 features three software-selectable powerdown output impedances: 100k, 1k, and high impedance. Other features include internal precision rail-to-rail output buffers and a power-on reset (POR) circuit that powers up the DAC in the 100k power-down mode. The MAX5822 features a double-buffered I2C-compatible serial interface that allows multiple devices to share a single bus. All logic inputs are CMOS-logic compatible and buffered with Schmitt triggers, allowing direct interfacing to optocoupled and transformer-isolated interfaces. The MAX5822 minimizes digital noise feedthrough by disconnecting the clock (SCL) signal from the rest of the device when an address mismatch is detected. The MAX5822 is specified over the extended temperature range of -40C to +85C and is available in a miniature 8-pin MAX package. Refer to the MAX5821 data sheet for the 10-bit version and the MAX5820 data sheet for the 8-bit version.