AD5686RARUZ

Overview

The AD5686RARUZ is a quad, 16-bit buffered voltage output digital-to-analog converter (DAC) from the nanoDAC+ family. It integrates a 2.5 V internal reference with a typical drift of 2 ppm/°C and supports user-selectable gain of 1 or 2 via the GAIN pin, enabling full-scale outputs of 2.5 V or 5 V. The device operates on a single 2.7 V to 5.5 V supply and features a versatile SPI interface with clock rates up to 50 MHz. Key performance metrics include ±2 LSB maximum relative accuracy (INL), ±1.5 mV maximum offset error, and a settling time of 5 µs to ±2 LSB. It is housed in a 16-lead TSSOP package.

Feature Summary

• Quad 16-bit resolution with ±2 LSB maximum INL and guaranteed monotonicity by design
• Integrated 2.5 V reference with 2 ppm/°C typical temperature coefficient
• User-selectable gain (GAIN pin) for 2.5 V or 5 V full-scale output ranges
• 50 MHz SPI interface with readback capability and 1.8 V logic compatibility

Applications

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

Procurement Notes

Verify the specific grade (A or B) required for your application, as specifications such as INL and offset error vary between grades. Confirm the package type is TSSOP-16. Ensure the ordering suffix matches the desired tape and reel quantity if applicable. Cross-reference the datasheet revision to confirm current electrical parameters before finalizing procurement.

Selection Notes

Select the AD5686R when 16-bit resolution and high accuracy are required. Choose Grade A for tighter INL specifications (±2 LSB) or Grade B for standard performance. Consider the GAIN pin configuration to determine if a 2.5 V or 5 V output range is needed. Verify that the system supply voltage falls within the 2.7 V to 5.5 V range and that the logic level is compatible with the VLOGIC pin requirements.

Part Context

The AD5686R is part of the nanoDAC+ family, which also includes the 14-bit AD5685R and 12-bit AD5684R. These devices share similar pinouts and functional blocks but differ in resolution and accuracy specifications. The R suffix typically denotes a specific packaging or reeling option within the Analog Devices portfolio, distinct from non-R variants which may use tube packaging.

Replacement Considerations

Direct substitutes within the same family include the AD5685R (14-bit) and AD5684R (12-bit) for lower resolution needs. For external reference versions, consider the AD566 series. Ensure any replacement maintains the 16-TSSOP package and SPI interface compatibility.