AD5668SRU-EP-1

Overview

The AD5668SRU-EP-1 is an enhanced product, octal, 16-bit buffered voltage-output digital-to-analog converter (DAC) from Analog Devices. Designed for defense and aerospace applications, it operates on a single 2.7 V to 5.5 V supply within a military temperature range of −55°C to +125°C. The device features a 16-lead TSSOP package and includes an on-chip 1.25 V reference with 5 ppm/°C stability, yielding a 2.5 V full-scale output. It guarantees monotonicity by design and incorporates power-on reset to zero scale or midscale. Power consumption drops to 400 nA at 5 V in power-down mode. The part supports a versatile 3-wire serial interface compatible with SPI, QSPI, Microwire, and DSP standards.

Feature Summary

• Octal, 16-bit resolution with guaranteed monotonic operation
• Military temperature range: −55°C to +125°C
• On-chip 1.25 V reference with ±5 ppm/°C temperature coefficient
• Low power consumption: 200 nA at 3 V, 400 nA at 5 V in power-down mode

Applications

• Defense systems
• Aerospace instrumentation
• Data acquisition systems
• Portable battery-powered instruments

Procurement Notes

Verify the specific suffix -EP-1 confirms the enhanced product baseline and military temperature rating. Ensure the RU-16 package option matches the required footprint. Confirm RoHS compliance status if applicable, as indicated by potential 'Z' suffix variants in the ordering guide. Check for qualification data availability if required for aerospace procurement.

Selection Notes

Select this component when military-grade reliability and wide temperature operation are mandatory. The internal 1.25 V reference provides a 2.5 V output span; use external references if higher voltage ranges are needed. Verify that the 16-bit resolution and 50 MHz serial clock speed meet system timing requirements. Consider the 16-lead TSSOP package constraints for PCB layout.

Part Context

This part belongs to the AD5668-EP Enhanced Product family, specifically tailored for AQEC (Aerospace and Quality Enhancement Control) applications. It shares functional compatibility with standard industrial AD5668 devices but offers controlled manufacturing baselines, single assembly/test sites, and product change notifications essential for long-life defense programs.

Replacement Considerations

Standard AD5668 variants lack the military temperature range and enhanced product controls. Cross-referencing requires verifying pinout compatibility and ensuring the replacement supports the required -55°C to +125°C operating range without compromising the 16-bit resolution or serial interface timing.