AD5689RBRUZ

Overview

The AD5689RBRUZ is a dual, 16-bit buffered voltage output digital-to-analog converter (DAC) from the nanoDAC+ family. It features an internal 2.5 V reference with a typical drift of 2 ppm/°C and operates on a single 2.7 V to 5.5 V supply. The device supports a 50 MHz SPI interface with readback or daisy-chain capabilities and includes a user-selectable gain pin for full-scale outputs of 2.5 V or 5 V. Key performance metrics include ±2 LSB maximum INL, 5 µs settling time, and low power consumption of 3.3 mW at 3 V.

Feature Summary

• Dual-channel 16-bit resolution with ±2 LSB maximum relative accuracy (INL).
• Integrated 2.5 V reference with 2 ppm/°C typical temperature coefficient.
• High drive capability providing 20 mA output current with rail-to-rail operation.
• Versatile 50 MHz SPI serial interface supporting daisy-chain and readback modes.

Applications

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

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified suppliers. Confirm the specific package variant matches the design requirements, as the AD5689R series is available in both LFCSP and TSSOP packages. Ensure that the ordering suffix corresponds to the desired packaging format before finalizing procurement orders.

Selection Notes

Select the AD5689RBRUZ when high precision and low drift are required for dual-channel applications. The GAIN pin allows configuration for either 0 V to 2.5 V or 0 V to 5 V output spans. Verify that the system logic levels are compatible with the 1.62 V to 5.5 V VLOGIC range and that the thermal management strategy accommodates the specified junction temperature limits.

Part Context

This component belongs to the AD5689R/AD5687R nanoDAC+ family, which provides low-power, high-accuracy solutions. The AD5689R specifically offers 16-bit resolution, whereas the AD5687R variant provides 12-bit resolution. Both share similar architectural features, including the internal reference and SPI interface, but differ in their linearity specifications and code ranges.

Replacement Considerations

The AD5687R serves as a lower-resolution alternative within the same family. For external reference configurations, the standard AD5689 and AD5687 models are available. Cross-model substitution requires verification of pin compatibility and software register mapping adjustments due to potential differences in resolution and accuracy specifications.