MAX5821

`Ultra-Low Supply Current 115A at VDD = 3.6V 135A 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 100k, 1k, and High Impedance
`Read-Back Mode for Bus and Data Checking
`Power-On Reset to Zero
`8-Pin MAX Package

V_DD, SCL, SDA to GND.........................................-0.3V to +6V
OUT_, REF, ADD to GND............................-0.3V to V_DD + 0.3V
Maximum Current into Any Pin........................................50mA
Continuous Power Dissipation (T_A = +70°C)
8-Pin MAX (derate 4.5mW above +70°C) ..................362mW
Operating Temperature Range .......................-40°C to +85°C
Storage Temperature Range ........................-65°C to +150°C
Maximum Junction Temperature .................................+150°C
Lead Temperature (soldering, 10s) ........................... +300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX5821 is a dual, 10-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 115A at VDD = 3.6V. A power-down mode decreases current consumption to less than 1A. The MAX5821 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 powerdown 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 MAX package. Refer to the MAX5822 data sheet for the 12-bit version