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Beyond Length Matching: From Controlled Impedance to DDR4/DDR5 Signal Integrity Verification
Beyond Length Matching: From Controlled Impedance to DDR4/DDR5 Signal Integrity Verification
Length matching is only one part of a successful DDR interface. Controlled impedance, discontinuities, loss, and other layout effects can influence signal behavior. The correct electrical design target, including controlled impedance, is not always obvious from the standard or routing rules alone.
In this practical session, we will work through a DDR4/DDR5 design and show how to approach SI verification directly within the PCB design workflow.
Rather than focusing on individual features, the session follows the engineer's actual problem-solving process: identify what needs to be checked, prepare the design for analysis, examine the results, understand what they mean, and determine what should change in the PCB.
Using Signal Analyzer by Keysight within Altium Designer, we will demonstrate how integrated analysis can provide additional insight into high-speed signals before the design reaches prototype or physical validation.
What You'll Learn
- Identify what matters in a DDR4/DDR5 design: Understand which signal integrity questions should be investigated beyond basic routing and length constraints.
- Prepare the design for meaningful analysis: See how stackup, nets and other design data affect the quality of the analysis.
- Evaluate critical signal behavior: Use Signal Analyzer to examine impedance and other relevant characteristics such as delay, insertion loss, and return loss on routed DDR signals.
- Turn results into design decisions: Learn how to interpret analysis results, identify potential root causes of SI problems, and determine what PCB changes should be considered.
- Understand when deeper analysis is needed: See where integrated design-stage analysis can support engineering decisions and when a more specialized verification approach may be appropriate.
Why Attend?
- Follow a real engineering workflow rather than a product feature walkthrough
- See signal integrity analysis applied to a practical DDR4/DDR5 design
- Learn how to move from an electrical analysis result to an actionable PCB decision
- Understand what design information is needed before electrical analysis becomes meaningful
- See how Signal Analyzer fits naturally into the Altium Designer workflow
- Ask questions directly during the live Q&A
Who Should Attend?
- PCB Designers working with high-speed digital interfaces like DDR4/DDR5
- Hardware Engineers responsible for board-level signal and power integrity
- Technical Leads and Principal Engineers looking to introduce earlier electrical verification into the design process
- Engineers using Altium Designer who want a practical understanding of Signal Analyzer
- Engineering teams looking to reduce reliance on late-stage troubleshooting and better understand design behavior before prototype
Reserve Your Spot
Join us for a practical walkthrough of DDR4/DDR5 signal integrity analysis and see how to move from design data to electrical analysis, interpretation, and an informed PCB design decision.
Author
Author
Alexsander joined Altium as a Technical Marketing Engineer and brings years of engineering expertise to the team. His passion for electronics design combined with his practical business experience provides a unique perspective to the marketing team at Altium. Alexsander graduated from one of the top 20 universities in the world at UCSD where he earned a Bachelor’s degree in Electrical Engineering.
Author
Author
Martin Malenica has a masters in electronic and computer engineering at the University of Zagreb. His previous experience consists of multiple embedded systems positions at robotics start-ups (Gideon with USD 35m in Seed and Series-A funding) and SMEs. His engineering strengths lie in system architecture, PCB design and embedded programming. Aside from engineering, Martin has spent the last 1.5 years working at a leading European management consulting firm, where he focused on strategies to support large OEMs and Tier-1s regarding the current semiconductor shortage across the whole EMEA region. Martin has practical experience within AD, but also a good understanding of competitor tools, especially on the procurement and supply chain side, like Everstream, Resilinc, Silicon Expert, Z2Data etc. Martin Joined Altium in 2023 as part of the Technical Sales team in Germany.
Author
Author
Majdi Thouabtia’s background is in electrical engineering, with several years of experience in hardware development and technical project management. He has worked across the full hardware lifecycle, from EMC-compliant circuit design and PCB layout to prototyping, testing, and production. Throughout my career, Altium Designer has been a key tool in his daily work, so he is especially proud to now be part of the team behind it.
Before joining Altium, he contributed to projects in the EV charging and IoT sectors, leading development efforts and collaborating with cross-functional teams and external partners. He holds a Master’s degree in Electrical Engineering from FAU Erlangen-Nürnberg.
Author
Author
Francesco holds a Master's degree in Electrical Engineering from EPFL, Switzerland. He is currently part of the Field Applications Engineering team at Altium. During his studies, his primary focus was on bioelectronics and the microfabrication of biomedical implants. After graduating, Francesco transitioned into a technical sales role with a global supplier and manufacturer of custom magnetics, where he was responsible for both technical and sales discussions, serving as the liaison between design engineers, manufacturing engineers, and customers.
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Related Resources
Related Technical Documentation
Beyond Length Matching: From Controlled Impedance to DDR4/DDR5 Signal Integrity Verification
Created: October 20, 2026
At a Glance
See how to investigate signal integrity on a real DDR4/DDR5 design and turn electrical analysis results into practical PCB design decisions.
Product:
Webinars
Altium Agile Teams
Simulation and Analysis
Signal Integrity
PCB Design Engineers
Simulation Engineers
Length matching is only one part of a successful DDR interface. Controlled impedance, discontinuities, loss, and other layout effects can influence signal behavior. The correct electrical design target, including controlled impedance, is not always obvious from the standard or routing rules alone.
In this practical session, we will work through a DDR4/DDR5 design and show how to approach SI verification directly within the PCB design workflow.
Rather than focusing on individual features, the session follows the engineer's actual problem-solving process: identify what needs to be checked, prepare the design for analysis, examine the results, understand what they mean, and determine what should change in the PCB.
Using Signal Analyzer by Keysight within Altium Designer, we will demonstrate how integrated analysis can provide additional insight into high-speed signals before the design reaches prototype or physical validation.
What You'll Learn
- Identify what matters in a DDR4/DDR5 design: Understand which signal integrity questions should be investigated beyond basic routing and length constraints.
- Prepare the design for meaningful analysis: See how stackup, nets and other design data affect the quality of the analysis.
- Evaluate critical signal behavior: Use Signal Analyzer to examine impedance and other relevant characteristics such as delay, insertion loss, and return loss on routed DDR signals.
- Turn results into design decisions: Learn how to interpret analysis results, identify potential root causes of SI problems, and determine what PCB changes should be considered.
- Understand when deeper analysis is needed: See where integrated design-stage analysis can support engineering decisions and when a more specialized verification approach may be appropriate.
Why Attend?
- Follow a real engineering workflow rather than a product feature walkthrough
- See signal integrity analysis applied to a practical DDR4/DDR5 design
- Learn how to move from an electrical analysis result to an actionable PCB decision
- Understand what design information is needed before electrical analysis becomes meaningful
- See how Signal Analyzer fits naturally into the Altium Designer workflow
Who Should Attend?
- PCB Designers working with high-speed digital interfaces like DDR4/DDR5
- Hardware Engineers responsible for board-level signal and power integrity
- Technical Leads and Principal Engineers looking to introduce earlier electrical verification into the design process
- Engineers using Altium Designer who want a practical understanding of Signal Analyzer
- Engineering teams looking to reduce reliance on late-stage troubleshooting and better understand design behavior before prototype
Related Resources
Related Technical Documentation
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