Low-Power, 12-Bit, Rail-to-Rail Voltage-Output Serial DAC in SOT23

The MAX5712 is a small footprint, low-power, 12-bit digital-to-analog converter (DAC) that operates from a single +2.7V to +5.5V supply. The MAX5712 on-chip precision output amplifier provides rail-to-rail output swing. Drawing only 85µA supply current at +3V, the MAX5712 is ideally suited for portable battery-operated equipment.

The MAX5712 utilizes a 3-wire serial-interface that is compatible with SPI/QSPI™/MICROWIRE® and DSP-interface standards. All logic inputs are CMOS-logic compatible and buffered with Schmitt triggers to allow direct interfacing to optocouplers. The MAX5712 incorporates a power-on reset (POR) circuit that ensures the DAC begins in a zero-volt-state upon power-up. A power-down mode that reduces current consumption to 0.3µA may be initiated through a software command.

The MAX5712 is available in a small 6-pin SOT23 package. For dual and quad 12-bit versions, see the MAX5722 and MAX5742 data sheets. For single, dual, and quad 10-bit versions, see the MAX5711, MAX5721 and MAX5741 data sheets. The MAX5712 is specified over the automotive temperature range of -40°C to +125°C. Applications

* Automatic Tuning (VCO) * Battery-Powered Applications * Gain and Offset Adjustment * Power Amplifier Control * Process-Control I/O Boards * VCO Control

* Wide -40°C to +125°C Operating Temperature Range

* Low 85µA Supply Current

* Ultra Low 0.3µA Power-Down Supply Current

* Single +2.7V to +5.5V Supply Voltage

* Fast 20MHz 3-Wire SPI/QSPI/MICROWIRE and DSP-Compatible Serial Interface

* Schmitt-Triggered Inputs for Direct Interfacing to Optocouplers

* Rail-to-Rail Output Buffer

* Tiny 6-Pin SOT23 Package

* Power-On Reset to 0V

* Three Software-Selectable Power-Down Output Impedances (100kΩ, 1kΩ, Hi-Z)