MAX549AEUA+

Digital To Analog Converters Overview

The MAX549AEUA+ 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 external reference input. The device utilizes an R-2R ladder architecture with unbuffered outputs and a 10MHz, 3-wire serial interface compatible with SPI/QSPI and Microwire standards. Key electrical specifications include a maximum total unadjusted error (TUE) of ±1 LSB, differential nonlinearity (DNL) of ±0.9 LSB, and integral nonlinearity (INL) of ±0.9 LSB. 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 an industrial temperature range of -40°C to +85°C.

Digital To Analog Converters Feature Summary

• Dual-channel configuration with independent shutdown capability for each DAC channel.
• External reference input allows flexibility in setting full-scale output ranges.
• Double-buffered inputs enable simultaneous or individual updates of DAC registers.
• Power-on reset mechanism initializes all internal registers to zero upon startup.

Digital To Analog Converters Applications

• Battery-powered portable systems requiring low power consumption.
• Voltage-controlled crystal oscillator (VCXO) control circuits.
• Comparator-level setting adjustments.
• GaAs amplifier bias control applications.
• Digital gain and offset control mechanisms.

Digital To Analog Converters Procurement Notes

Verify the specific ordering suffix 'EUA' corresponds to the -40°C to +85°C temperature range and 8-pin µMAX package. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the external reference source meets the required impedance specifications to maintain linearity performance.

Digital To Analog Converters Selection Notes

Select this component when a dual-channel DAC with external reference flexibility is required. The unbuffered output design necessitates high-resistive loads for optimal accuracy. Consider the 10MHz serial interface speed and double-buffering capabilities for system synchronization requirements. Verify that the application can accommodate the unbuffered output impedance characteristics.

Digital To Analog Converters Part Context

The MAX549AEUA+ belongs to the MAX548A/MAX549A/MAX550A family of low-power, single/dual, 8-bit voltage-output DACs. Unlike the MAX548A which uses VDD as the reference, the MAX549A requires an external reference. It shares the same µMAX packaging and serial interface compatibility as its siblings but differs in channel count and reference configuration.

Digital To Analog Converters Replacement Considerations

Direct substitutes within the same family include the MAX548AEUA+ (uses VDD reference) and MAX550AEUA+ (single channel). Ensure pin compatibility and reference input requirements are matched when considering these alternatives.