How to Test for DDR4 Compliance

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Application note

+ Infiniium UXR-Series Oscilloscope

Testing for DDR4 compliance with an oscilloscope and automated test software

Double Data Rate Fourth Generation (DDR4) compliance testing requires an oscilloscope with high enough bandwidth to measure the 3.2 GT/s data rate and advanced measurement analysis capabilities. Accurate measurements require a low-loading probe and interposer to access the memory signals without creating signal integrity issues. Automated compliance test software helps users set up and run compliance tests on the memory device.

The compliance test software should cover measurements such as eye diagram analysis, mask testing, and ringing. These are critical for characterizing DDR4 devices. Finally, the software should include the measurement's pass / fail status according to the Joint Electron Device Engineering Council (JEDEC) standard specification for DDR4 and LPDDR4 (low-power) devices.

UXR-SEries oscilloscope with memory test board

DDR4 compliance test solution

The Keysight DDR4 compliance test solution includes a real-time oscilloscope, a low-loading probe amplifier and interposer, and automated compliance test software. Keysight automated compliance test software runs on a high-bandwidth Keysight Infiniium UXR-Series oscilloscope. Developers can configure their hardware and test all clock, electrical, and timing parameters to ensure compliance with the JEDEC specification for all DDR4 and LPDDR4 devices, using key measurements such as real-time eye diagrams and jitter. The software provides a detailed report of the results and the measurement's pass / fail status. It also interfaces with Keysight EDA Memory Designer to test simulations and waveforms to better ensure your design and prototype perform as expected.

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