AD5668SRUZ-EP-1

Overview

The AD5668SRUZ-EP-1 is an enhanced product, octal, 16-bit buffered voltage-output digital-to-analog converter (DAC) designed for defense and aerospace applications. It operates from a single 2.7 V to 5.5 V supply and features an on-chip 1.25 V reference with 5 ppm/°C temperature coefficient, providing a 2.5 V full-scale output range. The device guarantees monotonicity by design and includes a power-on reset circuit that ensures outputs start at zero scale or midscale. It supports a versatile 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards, operating at clock rates up to 50 MHz. Power consumption is minimized through three power-down modes, reducing current to 400 nA at 5 V.

Feature Summary

• Octal, 16-bit resolution with rail-to-rail buffered voltage outputs in a 16-lead TSSOP package.
• Integrated 1.25 V internal reference with 5 ppm/°C stability; external reference support available.
• Military temperature range operation from −55°C to +125°C with controlled manufacturing baseline.
• Low power consumption with programmable power-down modes reducing current to 400 nA at 5 V.

Applications

• Defense systems
• Aerospace instrumentation
• Process control systems
• Data acquisition systems

Procurement Notes

Verify the specific suffix 'Z' indicates RoHS compliance when sourcing this component. Confirm the military temperature grade (-55°C to +125°C) matches system requirements. Ensure the ordering guide specifies the tube packaging option, as reel variants exist for the same electrical specifications. Check for qualification data availability if required for aerospace contracts.

Selection Notes

Select this part for applications requiring high channel density and strict environmental reliability. The internal reference provides a 2.5 V span; use external references if wider spans are needed. Verify compatibility with the host microcontroller's serial interface timing, specifically the 50 MHz SCLK limit. Consider the 6 µs settling time for bandwidth requirements in data acquisition loops.

Part Context

This component belongs to the AD5668-EP Enhanced Product family, distinct from commercial variants by its extended temperature range and controlled fabrication sites. It shares pinout and functional compatibility with standard AD5668 devices but offers guaranteed performance across military conditions. The 'RU-16' package designation refers to the 16-lead Thin Shrink Small Outline Package.

Replacement Considerations

Standard AD5668ARUZ-1 or AD5668BRUZ-1 parts offer identical electrical functionality but lack the enhanced product controls and military temperature rating. Substitution requires verification that the lower temperature range (-40°C to +105°C) meets operational needs. No direct pin-compatible alternatives with different manufacturers are confirmed in the provided documentation.