MAX548ACUA+

Digital To Analog Converters Overview

The MAX548ACUA+ is an 8-bit, dual-channel voltage-output digital-to-analog converter (DAC) manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +2.5V to +5.5V supply and features a ±1LSB maximum total unadjusted error (TUE) guaranteed over temperature. The device utilizes an R-2R ladder architecture with unbuffered outputs and accepts VDD as the reference input. It communicates via a 10MHz, 3-wire serial interface compatible with SPI/QSPI and Microwire standards. Operating current is typically 150µA per DAC at VREF = +2.5V, reducing to less than 1µA in shutdown mode. The component is housed in an 8-pin µMAX package and supports independent shutdown of each DAC channel.

Digital To Analog Converters Feature Summary

• Dual 8-bit voltage-output DACs with unbuffered outputs
• ±1LSB maximum total unadjusted error (TUE)
• 10MHz 3-wire serial interface compatible with SPI/QSPI and Microwire
• Independent shutdown capability for each DAC channel

Digital To Analog Converters Applications

• Battery-powered systems
• VCXO control
• Comparator-level settings
• GaAs amplifier bias control
• Digital gain and offset control

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'CUA' confirms the commercial temperature range (0°C to +70°C) and the 8-pin µMAX package configuration. Ensure compatibility with the required serial protocol settings (CPOL=0, CPHA=0) for the host microcontroller. Confirm that the unbuffered output impedance matches the load requirements of the target circuit design.

Digital To Analog Converters Selection Notes

Select this component when a low-power, dual-channel DAC is required in a compact surface-mount package. It is suitable for applications needing independent DAC shutdown to minimize power consumption. Verify that the system can tolerate the unbuffered output impedance and that the reference voltage source has sufficient drive capability to maintain accuracy.

Digital To Analog Converters Part Context

The MAX548A/MAX549A/MAX550A series provides flexible digital-to-analog conversion options in small packages. The MAX548A specifically integrates the reference input to VDD, simplifying external component count compared to the MAX549A and MAX550A which require external references. This series is designed for portable and battery-powered applications due to its low operating current and shutdown modes.

Digital To Analog Converters Replacement Considerations

Direct replacements within the same family include the MAX548AEUA+ for extended temperature ranges (-40°C to +85°C). Other variants like MAX549A or MAX550A offer different reference configurations but may require additional external components.