AD5791BRUZ

Overview

The AD5791BRUZ 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 with guaranteed monotonicity. The device utilizes a versatile 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards, supporting clock rates up to 35 MHz. Key performance metrics include a 1 µs settling time, 7.5 nV/√Hz noise spectral density, and <0.05 ppm/°C temperature drift. It incorporates an internal power-on reset circuit that ensures the output powers up to 0 V.

Feature Summary

• 20-bit resolution with ±1 LSB INL and DNL specifications ensuring monotonic operation.
• Wide supply range supporting up to ±16.5 V for high-voltage analog outputs.
• Low noise spectral density of 7.5 nV/√Hz and glitch impulse of 1.4 nV-sec.
• Integrated power-on reset logic forcing DAC output to 0 V upon initialization.

Applications

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

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm RoHS compliance status via official manufacturer documentation. Ensure storage conditions adhere to specified humidity and temperature limits to maintain package integrity prior to assembly.

Selection Notes

Select this component for applications requiring high precision and wide dynamic range. Ensure external reference voltages fall within the specified ranges: 5 V to VDD − 2.5 V for positive references and VSS + 2.5 V to 0 V for negative references. Verify that the host microcontroller supports the required 3-wire serial interface timing constraints.

Part Context

The AD5791BRUZ belongs to the AD5791 family of high-resolution data converters. It serves as a successor to lower-resolution models like the AD5781, offering enhanced linearity and stability. The 'B' suffix denotes specific accuracy grades, while 'RUZ' indicates the 20-lead TSSOP surface-mount package configuration.

Replacement Considerations

The AD5790 is a related device within the same product family. Designers should verify pin compatibility and register mapping when substituting components, as architectural differences may exist between variants.