AD5666ARUZ-2

Overview

The AD5666ARUZ-2 is a quad, 16-bit buffered voltage-output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7 V to 5.5 V supply and features an on-chip reference with internal gain of 2, providing a full-scale output of 5 V. The device guarantees monotonicity by design and includes a power-on reset circuit for configurable initial states. It utilizes a versatile 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards, supporting clock rates up to 50 MHz. Key specifications include a settling time of 6 µs, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±32 LSB.

Feature Summary

• Quad-channel 16-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 2.5 V reference with 5 ppm/°C temperature coefficient
• Power consumption reduced to 400 nA at 5 V in power-down mode
• Hardware LDAC and asynchronous CLR functions for simultaneous updates

Applications

• Process control systems
• Data acquisition systems
• Portable battery-powered instruments
• Digital gain and offset adjustment circuits
• Programmable voltage and current sources

Procurement Notes

Verify the specific suffix 'ARUZ-2' against the manufacturer's ordering guide to confirm package type (TSSOP-14) and grade (B Grade). Ensure compatibility with system voltage requirements (2.7 V to 5.5 V) and serial interface protocols. Confirm that the internal reference configuration meets the application's accuracy needs without external components.

Selection Notes

Select this component when a low-power, multi-channel DAC with integrated precision reference is required. The AD5666-2 variant provides a fixed 5 V full-scale output range. Consider the 14-lead TSSOP package constraints and thermal impedance (150.4°C/W) for PCB layout. Verify that the 50 MHz serial clock speed aligns with the host microcontroller's capabilities.

Part Context

The AD5666 belongs to the nanoDAC family, designed for applications requiring high accuracy and low power consumption. It is part of a series that includes variants with different channel counts and resolutions, such as the AD5668 (octal) and AD5648 (octal, 14-bit). The ARUZ-2 designation indicates a specific commercial grade and packaging option within the broader AD5666 product line.

Replacement Considerations

Direct pin-compatible replacements within the same family include other AD5666 variants with different suffixes for package or grade. For higher channel counts, consider the AD5668. For lower resolution but potentially lower cost, the AD5648 (14-bit) may be suitable if pinout compatibility is maintained.