Making Accurate Measurements on GDDR5 Memory Systems
Publication Number: 5990-6130EN
Publication Date: 2017.12.01
Language: English
Application Notes

Making Accurate Measurements on GDDR5 Memory Systems

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Introduction

Who should read this application note?

 

Memory designers and test engineers working on high-speed GDDR5 memory buses will find the application note helpful. GDDR5 (Graphics Double Data Rate, version 5) is a high performance dynamic random-access graphics card memory designed for applications requiring high bandwidth. GDDR5 technology offers higher data rates (up to 4x that of GDDR4) which enables more bandwidth over a narrower memory interface for superior performance. GDDDR5 design innovations and challenges involve working with a reduced size chip, 170 FBGA packages and use of data optimization with data and address bit inversion to improve signal quality. This also reduces the supply noise induced jitter. GDDR5 also adopts jitter control technology which filters high frequency jitter and realigns clock phase when its input duty is distorted.