General Description

The MAX548A/MAX549A/MAX550A serial, 8-bit voltage output digital-to-analog converters (DACs) operate from a single +2.5V to +5.5V supply. Their ±1LSB TUE specification is guaranteed over temperature. Operating current (supply current plus reference current) is typically 75µA per DAC with VDD= 2.5V. In shutdown, the DAC is disconnected from the reference, reducing current

drain to less than 1µA. The MAX548A/MAX549A allow each DAC to be shut down independently.

Features

♦ +2.5V to +5.5V Single-Supply Operation

♦ ±1LSB (max) TUE

♦ Power-On Reset Clears All Registers to Zero

♦ Low Operating Current:

  150µA (MAX548A/MAX549A, VREF= +2.5V)

  75µA (MAX550A, VREF= +2.5V)

♦ 1µA Shutdown Mode

♦ 10MHz, 3-Wire Serial Interface Compatible with SPI/QSPI and Microwire

♦µMAX Package—50% Smaller than 8-Pin SO

♦ Independent Shutdown of DACs (MAX548A/MAX549A)

Applications

    Battery-Powered Systems

    VCXO Control

    Comparator-Level Settings

    GaAs Amp Bias Control

    Digital Gain and Offset Control