AD5676RARUZ

Overview

The AD5676RARUZ is an octal, 16-bit buffered voltage output digital-to-analog converter (DAC) from Analog Devices. It features a low-drift 2.5 V internal reference with a typical temperature coefficient of 2 ppm/°C and operates on a single 2.7 V to 5.5 V supply. The device supports a user-selectable gain of 1 or 2 via the GAIN pin, providing full-scale outputs of 2.5 V or 5 V respectively. It utilizes a high-speed SPI interface capable of up to 50 MHz clock rates. Key performance metrics include a maximum integral nonlinearity (INL) of ±3 LSB and a settling time of 8 µs. The component is housed in a 20-lead TSSOP package.

Feature Summary

• Octal architecture with eight independent 16-bit DAC channels in a compact 20-lead TSSOP package.
• Integrated 2.5 V reference source with low drift (2 ppm/°C typical) and selectable gain settings (1x or 2x).
• High-speed 50 MHz SPI serial interface supporting readback and daisy-chain operations.
• Built-in power-on reset circuit ensuring outputs initialize to zero scale or midscale upon startup.

Applications

• Optical transceivers requiring multi-channel signal generation.
• Base station power amplifiers for precise bias control.
• Process control systems utilizing PLC input/output cards.
• Industrial automation equipment needing synchronized analog outputs.
• Data acquisition systems demanding high channel density.

Procurement Notes

Verify the specific grade (A or B) required for your application, as INL and offset specifications vary between grades. Confirm that the TSSOP-20 package aligns with your PCB footprint constraints. Ensure the logic voltage range (VLOGIC) of your microcontroller is compatible with the 1.62 V to 5.5 V operating range specified for the digital interface pins.

Selection Notes

Select this component when high channel density and 16-bit resolution are critical. The integrated reference simplifies design by reducing external component count. Consider the gain setting: use Gain = 1 for 0–2.5 V ranges or Gain = 2 for 0–5 V ranges. Verify thermal requirements, as the TSSOP package has a junction-to-ambient thermal resistance of 98.6°C/W, which may necessitate adequate PCB copper area for heat dissipation in dense layouts.

Part Context

The AD5676RARUZ belongs to the nanoDAC+ family, specifically the AD5676R series which integrates an internal reference. It differs from the AD5676 (no 'R') which requires an external reference. This part is functionally similar to the AD5672R but offers higher 16-bit resolution compared to the 12-bit AD5672R. It shares the same pinout and interface protocols as other members of the AD567xR family, facilitating platform scalability.

Replacement Considerations

Publicly confirmed direct substitutes within the same family include the AD5676ARUZ (same package, potentially different grade or revision). For applications requiring lower resolution, the AD5672RBRUZ serves as a functional alternative with 12-bit resolution. No cross-manufacturer pin-compatible replacements are verified in the provided documentation.