AD5686RBRUZ-RL7

Overview

The AD5686RBRUZ-RL7 is a quad, 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 offers high relative accuracy with a maximum integral nonlinearity (INL) of ±2 LSB at 16 bits. Key specifications include a total unadjusted error (TUE) of ±0.1% FSR, offset error of ±1.5 mV, and gain error of ±0.1% FSR. It supports a 50 MHz SPI interface with readback or daisy-chain capabilities and includes user-selectable gain settings for full-scale outputs of 2.5 V or 5 V.

Feature Summary

• Quad 16-bit resolution with ±2 LSB maximum INL
• Integrated 2.5 V reference with 2 ppm/°C typical drift
• 50 MHz SPI interface with 1.8 V logic compatibility
• User-selectable gain (GAIN pin) for 2.5 V or 5 V full-scale output
• Power-on reset circuit with RSTSEL pin for zero or mid-scale initialization

Applications

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

Procurement Notes

Verify the specific package variant against the datasheet options. The suffix RUZ indicates a 16-lead LFCSP package, while other variants may use TSSOP. Confirm the grade (A or B) required for specific temperature coefficient and accuracy tolerances. Ensure the ordering suffix matches the reel packaging configuration intended for automated assembly processes.

Selection Notes

Select this component when four independent 16-bit voltage outputs are required in a compact form factor. The internal reference simplifies design by eliminating external precision references. Choose Grade A for tighter INL specifications (±1 LSB) or Grade B for standard performance. Verify that the 20 mA drive capability meets load requirements and that the 2.7 V to 5.5 V supply range aligns with system power rails.

Part Context

This part belongs to the AD5686R/AD5685R/AD5684R family, which shares identical pinouts and interfaces but differs in resolution. The AD5685R provides 14-bit resolution, and the AD5684R provides 12-bit resolution. All members feature the same low-power architecture, SPI interface, and internal reference options, allowing for flexible scaling within multi-channel designs.

Replacement Considerations

The AD5685R and AD5684R are pin-compatible alternatives offering lower resolutions (14-bit and 12-bit, respectively). For external reference applications, consider the AD5686 without the 'R' suffix. Other nanoDAC+ family members like the AD569x series offer I2C interfaces instead of SPI.