AD5681RBCPZ-RL

Overview

The AD5681RBCPZ-RL is a single-channel, 12-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 utilizes a versatile 3-wire serial interface supporting clock rates up to 50 MHz. Key performance metrics include ±1 LSB maximum relative accuracy (INL), ±1 LSB differential nonlinearity (DNL), and a low glitch impulse of 0.1 nV-sec. It offers selectable output spans of 0 V to VREF or 0 V to 2 × VREF, high drive capability of 20 mA, and power consumption as low as 1.2 mW at 3.3 V.

Feature Summary

• 12-bit resolution with ±1 LSB INL and ±1 LSB DNL
• Internal 2.5 V reference with 2 ppm/°C typical drift
• Selectable output span: 0 V to VREF or 0 V to 2 × VREF
• 3-wire SPI interface with 50 MHz clock rate

Applications

• Process controls
• Data acquisition systems
• Digital gain and offset adjustment
• Programmable voltage sources

Procurement Notes

Verify the specific suffix 'RL7' against the manufacturer's ordering guide to confirm reel packaging specifications. Ensure the B-grade variant matches the required INL tolerance of ±2 LSB maximum. Confirm that the LFCSP-8 package dimensions align with the target PCB layout constraints.

Selection Notes

Select this component for applications requiring high relative accuracy in a compact footprint. The internal reference eliminates external components but requires decoupling. Verify logic voltage compatibility; while VDD supports 2.7 V to 5.5 V, logic inputs may require separate VLOGIC handling for 1.62 V compatibility depending on the specific pinout configuration.

Part Context

This part belongs to the AD5683R/AD5682R/AD5681R series, which shares architectural similarities but differs in resolution (16-bit, 14-bit, and 12-bit respectively). The AD5681R specifically targets cost-sensitive applications where 12-bit precision is sufficient. It is available in 8-lead LFCSP and 10-lead MSOP packages.

Replacement Considerations

Direct functional replacements within the same family include AD5682R (14-bit) and AD5683R (16-bit) for higher resolution needs. For external reference configurations, the AD5683 serves as a compatible alternative without an internal reference.