DAC 2-CH Resistor-String 12-bit 8-Pin uMAX

The MAX5722 dual,12-bit, low-power, buffered voltage-output, digital-to-analog converter (DAC) is packaged in a space-saving 8-pin µMAX package (5mm x 3mm). The wide supply voltage range of +2.7V to +5.5V and 112µA supply current accommodates low-power and low-voltage applications. DAC outputs employ on-chip precision output amplifiers that swing rail-to-rail. The MAX5722"s reference input accepts a voltage range from 0 to VDD. In power-down, the reference input is high impedance, further reducing the system"s total power consumption. The 20MHz, 3-wire SPI, QSPI, MICROWIRE, and DSP-compatible serial interface save board space and reduce the complexity of opto- and transformer-isolated applications. The MAX5722 on-chip power-on reset (POR) circuit resets the DAC outputs to zero and loads the output with a 100kO resistor to ground. This provides additional safety for applications that drive valves or other transducers that need to be off on power-up. The MAX5722"s software-controlled power-down reduces supply current to less than 0.3µA and provides software-selectable output loads (1kO, 100kO, or high impedance) while in power-down. The MAX5722 is specified over the -40°C to +125°C automotive temperature range.

• Ultra-Low Power Consumption
  • 112µA at V_DD = +3.6V
  • 135µA at V_DD = +5.5V

Wide +2.7V to +5.5V Single-Supply Range

8-Pin µMAX Package

0.3µA Power-Down Current

Guaranteed 12-Bit Monotonicity (±1 LSB DNL)

Safe Power-Up Reset to Zero Volts at DAC Output

Three Software-Selectable Power-Down Impedances (100kO, 1kO, Hi-Z)

Fast 20MHz, 3-Wire SPI, QSPI, and MICROWIRE-Compatible Serial Interface

Rail-to-Rail Output Buffer Amplifiers

Schmitt-Triggered Logic Inputs for Direct Interfacing to Optocouplers

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