AD5689RARUZ

Overview

The AD5689RARUZ is a dual, 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 temperature coefficient of 2 ppm/°C and operates on a single 2.7 V to 5.5 V supply. The device supports a 50 MHz SPI interface with readback or daisy-chain capabilities. Key performance metrics include a maximum integral nonlinearity (INL) of ±2 LSB, a settling time of 5 µs, and a low glitch impulse of 0.5 nV-sec. It offers high drive capability up to 20 mA and includes power-down modes reducing current consumption to 4 µA.

Feature Summary

• Dual-channel 16-bit resolution with ±2 LSB maximum INL
• Internal 2.5 V reference with 2 ppm/°C typical drift
• 50 MHz SPI interface with 1.8 V logic compatibility
• High drive capability: 20 mA output current

Applications

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

Procurement Notes

Verify the package type for the RARUZ suffix against official documentation, as the datasheet specifies LFCSP and TSSOP options. Confirm A-grade or B-grade specifications match application requirements regarding linearity and offset errors. Ensure the ordering suffix aligns with the specific pin configuration and thermal characteristics required for the design.

Selection Notes

Select this component when dual-channel precision is required with minimal external reference circuitry. The GAIN pin allows user-selectable output spans of 0 V to VREF or 0 V to 2 × VREF. Consider the power-on reset behavior controlled by the RSTSEL pin to ensure outputs initialize to zero scale or midscale. Verify that the 50 MHz SPI clock rate meets the system's data throughput needs.

Part Context

The AD5689R belongs to the nanoDAC+ family, which also includes the 12-bit AD5687R. Both devices share similar architectures but differ in resolution and accuracy specifications. The AD5689R provides higher precision suitable for applications demanding strict linearity, while the AD5687R offers a cost-effective alternative for less critical tasks.

Replacement Considerations

The AD5687R is a compatible 12-bit variant within the same family. For quad-channel configurations, consider the AD5697R. External reference versions like the AD5689 may be selected if a different reference voltage is preferred over the internal 2.5 V source.