3 V, Dual, Serial Input Complete 12-Bit DAC

The AD8303 is a complete (includes internal reference) dual, 12-bit, voltage output digital-to-analog converter designed to operate from a single +3 volt supply. Built using a CBCMOS process, this monolithic DAC offers the user low cost and ease-of-use in single-supply +3 volt systems. Operation is guaranteed over the supply voltage range of +2.7 V to +5.5 V making this device ideal for battery operated applications.

The 2.0475 V full-scale voltage output is laser-trimmed to maintain accuracy over the operating temperature range of the device. The binary input data format provides an easy-to-use one-half millivolt-per-bit software programmability. The voltage outputs are capable of sourcing 3 mA.

A double buffered serial data interface offers high speed, three-wire, DSP and SPI microcontroller compatible inputs using data in (SDI), clock (CLK) and load strobe (LDA + LDB) pins. A chip-select (CS) pin simplifies connection of multiple DAC packages by enabling the clock input when active low. Additionally, an RS input sets the output to zero scale or to 1/2 scale based on the level applied to the MSB pin. A power shutdown feature reduces power dissipation to less than 3 µW.

The AD8303 is specified over the extended industrial (-40°C to +85°C) temperature range. AD8303s are available in plastic DIP and low profile 1.75 mm height SO-14 surface mount packages. For single-channel DAC applications, see the AD8300 which is offered in the 8-lead DIP and SO-8 packages.

* Complete Dual 12-Bit DAC * Pretrimmed Internal Voltage Reference * Single +3 V Operation * 0.5mV/Bit with 2.0475 v Full Scale