MAX5444BCUB+

Digital To Analog Converters Overview

The MAX5444BCUB+ is a serial-input, voltage-output, 16-bit digital-to-analog converter (DAC) manufactured by Analog Devices / Maxim Integrated. It operates from a single +3V supply and features a 10-pin µMAX package. The device provides full 16-bit performance with an integral nonlinearity (INL) of ±4 LSB and differential nonlinearity (DNL) of ±1 LSB over the commercial temperature range of 0°C to +70°C. It utilizes a 25MHz, 3-wire serial interface compatible with SPI/QSPI/MICROWIRE standards. Key electrical characteristics include a typical supply current of 120µA, a settling time of 1µs, and an unbuffered output capable of driving loads greater than 60kΩ.

Digital To Analog Converters Feature Summary

• Unbuffered voltage output architecture minimizes power consumption and offset error while supporting medium-load applications.
• Integrated matched scaling resistors enable bipolar operation when connected to an external precision operational amplifier.
• Power-on reset circuit ensures deterministic startup states by clearing the DAC output to mid-scale code upon initial power application.
• Schmitt-trigger inputs on digital lines allow direct interfacing with optocouplers for isolated system designs.

Digital To Analog Converters Applications

• High-resolution offset and gain adjustment circuits
• Industrial process control systems requiring precise analog signal generation
• Automated test equipment demanding stable digital-to-analog conversion
• Data-acquisition systems utilizing serial communication interfaces

Digital To Analog Converters Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type, temperature range, and lead-free compliance status. Ensure that the selected variant matches the required supply voltage and pin configuration for the target design. Cross-reference part numbers with authorized distributors to confirm availability and authenticity before procurement.

Digital To Analog Converters Selection Notes

Select this component for applications requiring 16-bit resolution with low power consumption in a compact surface-mount package. The MAX5444BCUB+ is suitable for designs operating within the 0°C to +70°C commercial temperature range. Consider the unbuffered output impedance when designing load conditions, as loading affects gain error but not linearity for impedances above 60kΩ. Verify compatibility with the system's serial clock speed and logic levels.

Digital To Analog Converters Part Context

This device belongs to the MAX544x family of 16-bit serial-input DACs, which includes variants operating at +5V (MAX5441/MAX5442) and +3V (MAX5443/MAX5444). The MAX5444 specifically supports bipolar output configurations via internal scaling resistors. The 'B' suffix indicates a ±4 LSB INL specification, distinguishing it from the higher-precision 'A' variant with ±2 LSB INL. All members share the same functional interface and architectural principles.

Digital To Analog Converters Replacement Considerations

The MAX5444ACUB+ serves as a higher-precision alternative within the same package and supply voltage, offering ±2 LSB INL instead of ±4 LSB. Designers requiring extended temperature ranges should consider the MAX5444BEUB+, which operates from -40°C to +85°C. Substitutions must account for differences in linearity specifications and thermal operating limits.

Digital To Analog Converters FAQ

What is the default DAC output state after power-on?

The power-on reset circuit clears the DAC output to code 32768 (mid-scale) when VDD is initially applied.

Can the MAX5444BCUB+ generate bipolar output voltages?

Yes, the device includes matched scaling resistors that connect to an external op amp to generate a ±VREF output swing.

How does the unbuffered output affect performance?

Unbuffered operation reduces supply current to 120µA and eliminates offset error from an external buffer. It can drive loads greater than 60kΩ without degrading INL or DNL.