MAX549ACPA+

Digital To Analog Converters Overview

The MAX549ACPA+ is a dual, 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, a typical operating current of 75µA per DAC at VDD = 2.5V, and a shutdown current of less than 1µA. The component is housed in an 8-PDIP package and supports an operating temperature range of 0°C to +70°C.

Digital To Analog Converters Feature Summary

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

Digital To Analog Converters Applications

• Battery-powered systems requiring low power consumption
• VCXO control circuits
• Comparator-level settings
• GaAs amplifier bias control
• Digital gain and offset control

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'CPA+' corresponds to the 8-pin Plastic DIP package and commercial temperature grade when sourcing. Confirm RoHS compliance status as indicated by the '+' designation in the ordering information. Ensure the external reference source impedance remains below 3Ω to maintain specified linearity performance.

Digital To Analog Converters Selection Notes

Select this component for applications requiring dual 8-bit resolution with independent channel control. The MAX549A differs from the MAX548A by utilizing an external reference rather than VDD. Consider the MAX550A if only a single DAC channel is needed with asynchronous load functionality. Verify that the unbuffered output impedance matches the load requirements of the downstream circuitry.

Digital To Analog Converters Part Context

The MAX549ACPA+ belongs to the MAX548A/MAX549A/MAX550A family of low-power, single/dual, 8-bit voltage-output DACs. These devices are designed for portable and battery-powered applications due to their low operating current and small package options. The family shares a common serial interface protocol and architectural features, differing primarily in channel count and reference input configuration.

Digital To Analog Converters Replacement Considerations

Direct substitutes within the same package and specification include the MAX548ACPA+ and MAX550ACPA+. Note that the MAX548ACPA+ uses VDD as the reference, while the MAX550ACPA+ provides only a single DAC channel. Ensure pin compatibility and reference input requirements align before substitution.