AD5781SRU-EP

Overview

The AD5781SRU-EP is a single-channel, true 18-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features ±0.5 LSB maximum integral nonlinearity (INL) and differential nonlinearity (DNL), ensuring monotonic operation. The device operates with bipolar analog supplies up to ±16.5 V and digital supplies of 2.7 V to 5.5 V. Key electrical specifications include a 1 µs settling time, 7.5 nV/√Hz noise spectral density, and a glitch impulse of 1.4 nV-sec. It utilizes a versatile 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP standards, supporting clock rates up to 35 MHz.

Feature Summary

• Enhanced Product (EP) qualification for defense and aerospace applications under AQEC standards
• Military temperature range operation from −55°C to +125°C
• Controlled manufacturing baseline with single assembly/test and fabrication sites
• True 18-bit resolution with ±0.5 LSB INL/DNL and <0.05 ppm/°C temperature drift

Applications

• Medical instrumentation
• Test and measurement equipment
• Industrial control systems
• Scientific and aerospace instrumentation
• Data acquisition systems

Procurement Notes

Verify the specific suffix 'SRU-EP' against the manufacturer's current ordering guide to confirm package type and tape/reel configuration. Ensure compliance with AQEC standards if required for the intended defense or aerospace application. Confirm that the controlled manufacturing baseline meets specific project quality requirements.

Selection Notes

Select this component when military-grade reliability and extended temperature performance are required alongside high precision. The EP variant ensures product change notification and available qualification data. Verify that the external reference buffering and output drive capabilities meet the system's impedance and noise requirements.

Part Context

The AD5781SRU-EP belongs to the AD5781 family of high-precision DACs. The '-EP' suffix denotes an Enhanced Product version designed for rugged environments. It shares core architectural features with the commercial AD5781 but adheres to stricter manufacturing controls and environmental testing protocols defined by the AQEC standard.

Replacement Considerations

The AD5791-EP serves as a higher-resolution 20-bit alternative within the same enhanced product line. For general industrial use where military qualification is unnecessary, the commercial AD5781 offers identical electrical performance without the EP manufacturing constraints.