AD5685RARUZ-RL7

Overview

The AD5685RARUZ-RL7 is a quad, 14-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 supports a 50 MHz SPI interface with readback or daisy-chain capabilities and includes a user-selectable gain of 1 or 2 via the GAIN pin. Key performance metrics include ±1 LSB maximum relative accuracy (INL), 8 µs settling time, and low power consumption of 3.3 mW at 3 V. It is available in 16-lead TSSOP and LFCSP packages.

Feature Summary

• Quad 14-bit resolution with ±1 LSB maximum INL
• Internal 2.5 V reference with 2 ppm/°C typical drift
• 50 MHz SPI interface with 1.8 V logic compatibility
• User-selectable gain (1x or 2x) for 0–2.5 V or 0–5 V output spans

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 ordering code. The suffix 'RUZ' indicates a 16-lead TSSOP package, while 'RCSZ' denotes a 16-lead LFCSP. Confirm that the 'RL7' suffix corresponds to the required tape and reel quantity. Ensure the grade (A or B) matches the application's accuracy requirements, as specifications vary between grades.

Selection Notes

Select the AD5685RARUZ-RL7 when a quad 14-bit DAC with high precision is required. The internal 2 ppm/°C reference eliminates the need for external components, reducing board space. Choose this part over the AD5686R if 14-bit resolution is sufficient, or over the AD5684R if higher accuracy is needed. Ensure the load impedance and capacitive load requirements are within the stability limits specified in the datasheet.

Part Context

This component belongs to the AD5686R/AD5685R/AD5684R family, which shares identical pinouts and functional blocks but differs in resolution. The AD5685R provides 14-bit performance, positioned between the 16-bit AD5686R and the 12-bit AD5684R. All members of this series feature the same SPI interface, reset options, and power-down modes.

Replacement Considerations

The AD5686RARUZ-RL7 and AD5684RARUZ-RL7 are pin-compatible alternatives within the same family. For external reference applications, consider the AD5685ARUZ-RL7. Verify that any substitute maintains the required 14-bit resolution and SPI interface compatibility.