AD5668ARUZ-2

Overview

The AD5668ARUZ-2 is an octal, 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 internal 2.5 V reference with 5 ppm/°C temperature coefficient, providing a 5 V full-scale output range. The device guarantees monotonicity by design and includes a power-on reset circuit that initializes outputs to 0 V. It supports a versatile 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards, with clock rates up to 50 MHz. Key specifications include a settling time of 6 µs, ±1 LSB DNL, and ±16 LSB INL (B Grade).

Feature Summary

• Octal architecture with 16-bit resolution and rail-to-rail buffered voltage outputs.
• Integrated 2.5 V internal reference with 5 ppm/°C stability for 5 V full-scale range.
• Power-down mode reduces current consumption to 400 nA at 5 V.
• Asynchronous CLR function allows updating all DACs to zero, midscale, or full scale.

Applications

• Process control systems
• Data acquisition systems
• Portable battery-powered instruments
• Programmable voltage and current sources

Procurement Notes

Verify the specific suffix 'ARUZ-2' against the manufacturer's ordering guide to confirm the package type (TSSOP-16), temperature grade (Industrial -40°C to +105°C), and reference configuration (Internal 2.5 V). Ensure compatibility with system voltage requirements of 2.7 V to 5.5 V.

Selection Notes

Select this component when eight independent 16-bit channels are required in a small footprint. Compare with AD5668BRUZ-1 if higher accuracy (±16 LSB INL vs ±32 LSB INL) is needed, noting that the B-grade version may have different availability. Ensure the application can accommodate the software-enabled internal reference startup sequence.

Part Context

The AD5668ARUZ-2 belongs to the denseDAC family, which also includes the 12-bit AD5628 and 14-bit AD5648 variants. These devices share pinouts and functionality but differ in resolution and linearity specifications. The ARUZ-2 specifically denotes the 16-lead TSSOP package variant with the A-grade performance level.

Replacement Considerations

The MS5268 is documented as a pin-compatible alternative offering similar octal, 16-bit functionality with internal references.