MAX548ACUA+T

Digital To Analog Converters Overview

The MAX548ACUA+T is a dual-channel, 8-bit 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 an R-2R ladder architecture with unbuffered outputs. The device utilizes a 10MHz, 3-wire serial interface compatible with SPI, QSPI, and Microwire standards. It includes double-buffered inputs for flexible updating and independent shutdown capabilities for each DAC channel. The component is housed in an 8-pin µMAX package and is specified for operation within a temperature range of 0°C to +70°C.

Digital To Analog Converters Feature Summary

• Dual-channel 8-bit resolution with ±1LSB total unadjusted error specification over the operating temperature range.
• Low power consumption with typical operating current of 75µA per DAC at 2.5V and shutdown current below 1µA.
• Asynchronous load input allows independent updating of DAC registers separate from the serial clock cycle.
• Internal power-on reset clears all registers to zero upon initialization without requiring external sequences.

Digital To Analog Converters Applications

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

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'CUA' confirms the commercial temperature range (0°C to +70°C) and µMAX packaging when sourcing. Ensure the '+T' designation aligns with reel packaging requirements for your assembly line. Cross-reference the manufacturer's latest documentation to confirm RoHS compliance status and any potential obsolescence notices prior to finalizing procurement plans.

Digital To Analog Converters Selection Notes

Select this component for designs requiring low-power, dual-channel voltage output with serial control. The MAX548A uses VDD as the reference input, simplifying circuitry compared to external reference variants. Ensure the application can tolerate unbuffered outputs or add buffering if drive capability exceeds the internal 33.3kΩ output resistance limits. Verify that the microprocessor interface supports the required 3-wire protocol timing constraints.

Digital To Analog Converters Part Context

This part belongs to the MAX548A/MAX549A/MAX550A family of low-power, single/dual, 8-bit voltage-output DACs. While the MAX549A requires an external reference and lacks an LDAC pin, and the MAX550A is a single-channel variant, the MAX548A specifically integrates the reference input directly to VDD and provides dual channels with asynchronous loading capabilities in a compact µMAX footprint.

Digital To Analog Converters Replacement Considerations

Direct substitutes within the same family include the MAX548AEUA+T for extended temperature ranges (-40°C to +85°C) and the MAX548ACPA+ for DIP packaging. Other family members like the MAX549A differ significantly due to external reference requirements and lack of LDAC functionality.