Low-Cost, +5V, Serial-Input, Voltage-Output, 14-Bit DAC

The MAX5544 serial-input, voltage-output, 14-bit monotonic digital-to-analog converter (DAC) operates from a single +5V supply. The DAC output is unbuffered, resulting in low 0.3mA supply current and low 1 LSB offset error. The DAC output range is 0V to VREF. The DAC latch accepts a 16-bit serial word. A power-on reset circuit clears the DAC output to 0V (unipolar mode) when power is initially applied.

The 10MHz 3-wire serial interface is SPI™/QSPI™/MICROWIRE™ compatible and interfaces directly with optocouplers for applications requiring isolation. The MAX5544 is available in an 8-pin SO package.

Applications

* Automated Test Equipment (ATE) * Data Acquisition * High-Resolution Offset and Gain Adjustment * Industrial Process Controls

* Full 14-Bit Performance Without Adjustments

* +5V Single-Supply Operation

* Low Power: 1.5mW

* 1µs Settling Time

* Unbuffered Voltage Output Directly Drives 60kΩ Loads

* SPI/QSPI/MICROWIRE-Compatible Serial Interface

* Power-On Reset Circuit Clears DAC Output to 0V (unipolar mode)

* Schmitt Trigger Inputs for Direct Optocoupler Interface