MAX5820 Datasheet | Maxim Integrated

19-3538; Rev 0; 2/05 Dual, 8-Bit, Low-Power, 2-Wire, Serial Voltage-Output DAC General Description The MAX5820 is a dual, 8-bit voltage-output, digital-toanalog converter (DAC) with an I 2 C- -patible, 2-wire interface that operates at clock rates up to 400k Hz. The device operates from a single 2.7V to 5.5V supply (115µA at VDD = 3.6V). A power-down mode decreases current consumption to less than 1µA. The MAX5820 Features three software-selectable power-down output impedances: 100kΩ, 1kΩ, 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 100kΩ power-down mode. The MAX5820 Features a double-buffered I2C-patible serial interface that allows multiple devices to share a single bus. All logic inputs are CMOS-logic patible and buffered with Schmitt triggers, allowing direct interfacing to optocoupled and transformer-isolated interfaces. The MAX5820 minimizes digital noise feedthrough by disconnecting the clock (SCL) signal from the rest of the device when an address mismatch is detected. The MAX5820 is specified over the extended (-40°C to +85°C) temperature range and is available in a small 8-pin µMAX ® package. Refer to the MAX5822 data sheet for the 12-bit version and to the MAX5821 data sheet for a 10-bit version. - Ultra-Low Supply Current 115µA at VDD = 3.6V 135µA at VDD = 5.5V - 300n A Low-Power Power-Down Mode - Single 2.7V to 5.5V Supply Voltage - Fast 400k Hz I2C-patible 2-Wire Serial Interface - Schmitt-Trigger Inputs for Direct Interfacing to Optocouplers - Rail-to-Rail Output Buffer Amplifiers - Three Software-Selectable Power-Down Output Impedances 100kΩ, 1kΩ, and High Impedance - Readback Mode for Bus and Data Checking - Power-On Reset to Zero - 8-Pin µMAX Package Features Ordering Information PART MAX5820LEUA MAX5820MEUA TEMP RANGE PINPACKAGE ADDRESS 0111 00X 1011 00X Applications Digital Gain and Offset...