AD5686RBRUZ

Overview

The AD5686RBRUZ 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 temperature coefficient of 2 ppm/°C and features an SPI interface supporting clock rates up to 50 MHz. The device operates on a single 2.7 V to 5.5 V supply and includes user-selectable gain settings for full-scale outputs of 2.5 V or 5 V. Key performance metrics include ±2 LSB maximum integral nonlinearity (INL), ±1.5 mV offset error, and 3.3 mW power consumption at 3 V. It is available 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 low-drift reference (2 ppm/°C typical) with selectable gain of 1 or 2
• Versatile 50 MHz SPI interface with readback capability and daisy-chain support
• Power-on reset circuit with RSTSEL pin for zero scale or midscale initialization

Applications

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

Procurement Notes

Verify the specific grade (A or B) required for the application, as specifications such as INL and offset error vary between grades. Confirm the package type matches the design; the BRUZ suffix indicates a 16-lead TSSOP. Ensure the system logic levels are compatible with the VLOGIC pin range of 1.62 V to 5.5 V. Check for any recent revision updates to the datasheet that may affect timing or electrical characteristics.

Selection Notes

Select the AD5686RBRUZ when four independent 16-bit voltage outputs are needed with high relative accuracy. Choose Grade A for tighter INL specifications (±2 LSB max) or Grade B if slightly relaxed linearity (±8 LSB max) is acceptable for cost optimization. Consider the external reference option (AD5686) if lower drift than the internal 2 ppm/°C reference is required. Verify that the capacitive load requirements do not exceed the stability limits specified in the datasheet.

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 AD5686R specifically targets applications requiring higher precision compared to its siblings, offering 16-bit resolution with integrated buffering and a low-drift internal reference.

Replacement Considerations

The AD5686RBCPZ-RL7 is a direct replacement offering the same functionality in a 16-lead LFCSP package instead of TSSOP. For applications requiring fewer channels, the AD5689R provides dual-channel 16-bit performance. If external reference usage is preferred, the AD5686 serves as the non-R variant.