MAXIM MAX5821MEUA+T

The MAX5821 is a dual, 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, consuming 115μA at VDD = 3.6V. A power-down mode decreases current consumption to less than 1μA. The MAX5821 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 MAX5821 is a dual, 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, consuming 115μA at VDD = 3.6V.
• A power-down mode decreases current consumption to less than 1μA.
• The MAX5821 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 MAX5821 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 MAX5821 minimizes digital noise feedthrough by disconnecting the clock (SCL) signal from the rest of the device when an address mismatch is detected.
• The MAX5821 is specified over the extended temperature range of -40°C to +85°C and is available in a miniature 8-pin μMAX package.
• Ultra-Low Supply Current 115μA at VDD = 3.6V, 135μA 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 Amplifiers
• 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
• 8-Pin μMAX Package

• Digital Gain and Offset Adjustments
• Programmable Voltage and Current Sources
• Programmable Attenuation
• VCO/Varactor Diode Control
• Low-Cost Instrumentation
• Battery-Operated Instrumentation