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MAX550A：+2.5V to +5.5V, Low-Power, Single/Dual, 8-Bit Voltage-Output DACs in µMAX Package

Dual, Serial, Voltage-Output DACs in a µMAX Package

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. The 10MHz, 3-wire serial interface is compatible with SPI™/QSPI™ and Microwire™ interface standards. Double-buffered inputs provide flexibility when updating the DACs; the input and DAC registers can be updated individually or simultaneously. The MAX548A is a dual DAC with an asynchronous load input; it uses VDD as the reference input. The MAX549A is a dual DAC with an external reference input. The MAX550A is a single DAC with an external reference input and an asynchronous load input. The MAX548A/MAX549A/MAX550A's low power consumption and small µMAX® and DIP packages make these devices ideal for portable and battery-powered applications.

Key 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)

MAX548A, MAX549A, MAX550A: Functional Diagram Applications/Uses Battery-Powered Applications Comparator-Level Settings Digital Gain and Offset Control GaAs Amp Bias Control General Purpose VCXO Control

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