AD5689BRUZ

Overview

The AD5689BRUZ is a dual, 16-bit buffered voltage output digital-to-analog converter (DAC) from the nanoDAC+ family. It operates on a single 2.7 V to 5.5 V supply and features an SPI interface with clock rates up to 50 MHz. The device includes a user-selectable gain pin for full-scale outputs of 2.5 V or 5 V. Key electrical parameters include a maximum integral nonlinearity (INL) of ±3 LSB, a settling time of 5 µs, and a power consumption of 3.3 mW at 3 V. It supports per-channel power-down modes reducing current to 4 µA.

Feature Summary

• Dual 16-bit resolution with high relative accuracy (±2 LSB INL max).
• User-selectable gain via GAIN pin for 2.5 V or 5 V full-scale output.
• Power-on reset circuit with RSTSEL pin for zero scale or midscale initialization.
• Versatile 50 MHz SPI interface with readback and daisy-chain capabilities.

Applications

• Optical transceivers
• Base station power amplifiers
• Process control PLC I/O cards
• Industrial automation systems
• Data acquisition systems

Procurement Notes

Verify package availability as the component is offered in both 16-lead LFCSP and TSSOP formats. Confirm that the specific suffix 'BRUZ' corresponds to the required packaging and temperature grade. Ensure compatibility with the host system's logic voltage levels, which range from 1.62 V to 5.5 V.

Selection Notes

Select this model when dual-channel 16-bit precision is required with low power constraints. The external reference design necessitates an independent VREF source. Consider the 16-TSSOP package if board space allows for larger footprints compared to the LFCSP option. Verify that the 20 mA drive capability meets load requirements.

Part Context

This part belongs to the AD5689/AD5687 nanoDAC+ family, sharing functional blocks with the 12-bit AD5687 variant. It utilizes a string DAC architecture and is designed for applications requiring monotonicity without external filtering. The device integrates power-on reset logic and hardware LDAC functionality for synchronized updates.

Replacement Considerations

The AD5687BRUZ serves as a direct pin-compatible alternative offering 12-bit resolution. For quad-channel configurations, the AD5686 series provides similar performance characteristics. Internal reference variants such as the AD5689R offer integrated references but may require different input register configurations.