AD5668BRUZ-1

Overview

The AD5668BRUZ-1 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 1.25 V reference with 5 ppm/°C temperature coefficient, providing a 2.5 V full-scale output range. The device includes a power-on reset circuit that ensures outputs start at zero scale. 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 ±1 LSB differential nonlinearity, ±16 LSB integral nonlinearity, and rail-to-rail output swing.

Feature Summary

• Octal architecture with eight independent 16-bit DAC channels in a 16-lead TSSOP package.
• Integrated 1.25 V precision reference with 5 ppm/°C drift, enabling a 2.5 V full-scale output range.
• Power-on reset function guarantees DAC outputs initialize to 0 V upon startup.
• Low power consumption with software-selectable power-down modes reducing current to 400 nA at 5 V.

Applications

• Process control systems requiring multi-channel analog output.
• Data acquisition systems for signal generation.
• Portable battery-powered instruments due to low power operation.
• Programmable voltage and current sources.
• Digital gain and offset adjustment circuits.

Procurement Notes

Verify the specific suffix '1' confirms the 1.25 V internal reference configuration. Confirm the 'B' grade meets the required linearity specifications of ±16 LSB INL and ±1 LSB DNL. Ensure the TSSOP-16 package variant matches the PCB footprint requirements. Check for RoHS compliance status as indicated in official documentation.

Selection Notes

Select this component when eight simultaneous 16-bit voltage outputs are required within a small footprint. The internal 1.25 V reference makes it suitable for applications needing a 2.5 V span without external references. Compare against AD5668ARUZ-1 if A-grade accuracy is needed, or AD5668BRUZ-3 if a 5 V full-scale range via a 2.5 V internal reference is preferred.

Part Context

The AD5668BRUZ-1 belongs to the AD5628/AD5648/AD5668 family of denseDACs. It shares pinout and functionality with the 12-bit AD5628 and 14-bit AD5648 variants, allowing for design flexibility across resolution requirements. The 'RU' designation indicates the 16-lead TSSOP package, while 'B' denotes the B-grade performance tier.

Replacement Considerations

The MS5268 is documented as a pin-compatible alternative offering similar octal 16-bit functionality. Other family members like the AD5668ARUZ-1 provide higher accuracy grades but may differ in cost and availability.