AD5791ARUZ

Overview

The AD5791ARUZ is a single-channel, 20-bit unbuffered voltage-output digital-to-analog converter (DAC) from Analog Devices. It operates on bipolar supplies up to ±16.5 V and features a relative accuracy of ±1 LSB maximum with guaranteed monotonic operation. The device incorporates a versatile 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards, supporting clock rates up to 35 MHz. Key electrical specifications include a noise spectral density of 7.5 nV/√Hz, a settling time of 1 µs, and a glitch impulse of 1.4 nV-sec. It is housed in a 20-lead TSSOP package.

Feature Summary

• 20-bit resolution with 1 ppm INL and ±1 LSB DNL guaranteeing monotonicity
• Low noise spectral density of 7.5 nV/√Hz and glitch impulse of 1.4 nV-sec
• Wide power supply range operating up to ±16.5 V with bipolar supplies
• 3-wire serial interface compatible with standard SPI, QSPI, MICROWIRE, and DSP protocols

Applications

• Medical instrumentation
• Test and measurement
• Industrial control
• High-end scientific and aerospace instrumentation

Procurement Notes

Verify the specific suffix 'R' for reel packaging against official documentation before procurement. Confirm that the A version meets the required INL specifications for the target application, as performance varies between versions. Ensure compatibility with the intended reference voltage ranges and supply voltages during component selection.

Selection Notes

Select the AD5791ARUZ when high precision and wide dynamic range are required. The A version offers broader INL tolerance compared to the B version; verify if the tighter ±1 LSB INL of the B version is necessary. Ensure the system design accommodates the required bipolar supply rails and external reference buffering components specified in the typical operating circuit.

Part Context

The AD5791 belongs to a family of high-precision DACs designed for demanding applications requiring superior linearity and stability. It serves as a semiconductor alternative to traditional Kelvin-Varley dividers, offering comparable performance in a compact integrated circuit form factor suitable for modern electronic systems.

Replacement Considerations

The AD5781 is an 18-bit related device within the same product family. Verify pinout compatibility and interface requirements when considering cross-model substitutions.