Lattice semiconductor high speed pcb design considerations 2 the disadvantage of this approach is an increase in the number of backplane nets and card port interfaces that may be needed. The one where you spend most of your time selecting the right components, getting them all placed on your board layout, wiring everything up with traces, and sending your files off to your manufacturer. This application report addresses highspeed signals, such as clock signals and their routing. Most applications for high speed require material with a loss tangent of 0. Theres a lot to consider regarding pcb layout and design. High speed pcb design rules lesson 4 of advanced pcb. Highspeed pcb design considerations lattice semiconductor. The topics covered include pcb design considerations regarding the routing of high speed signals, selecting stackup of the pcb. Via optimization techniques for highspeed channel designs figure 1. May 19, 2015 design considerations for high speed pcbs institute of circuit technology.
As consumer devices continue to shrink in size, power considerations and appropriate thermal design become increasingly important for circuit designers and board layout engineers. Proper board layer stackup in high speed board design requires the best pcb software, and altium designer is a good one to get started with. Special considerations for high speed board design tempo. Mechanical design considerations for conventionally laminated, highspeed, interior pm synchronous machine rotors article pdf available in ieee transactions on industry applications 403. Altera devices have fast io pins with fall times as low as 1 ns to 3 ns. A lot of the trace routing that you will do in a high speed design will be the same as what youve always done. One possible difference is that of length requirements between traces.
The board design guidelines solution center provides you with board designrelated resources for altera devices. If careful design practices are not followed, the unwanted signals can easily mask those a. Iopins should be configured as output and driven to static low in the. Want some more best practices on how to design a board that gets manufactured right the first time. Minimize crosstalk differential pairs operate by the principle of coupling. The bestknown section of pdl is the beijingshanghai high speed railway that opened to the public in june 2011 with a design top speed of 380 kmh 236 mph. Considerations for high speed pcb track design in 10gbs serial data transmission white paper steve bowers and dr herbert lage applications engineering avago technologies fiber optic products division 2 abstract a fundamental evaluation of a variety of approaches for designing a high speed 10 gbs serial differential electrical channel is. Some considerations apply to the entire process, while some are specific to particular steps. Be prepared to get creative if the design demands high volume, low cost pcbs.
Pdf mechanical design considerations for conventionally. And when you have to make considerations of this sort, then your pcb design process will take on a whole new level. Lattice semiconductor high speed pcb design considerations. Click the pdf above to read more about high speed design in this ebook. Next discussed is signal integrity and sso considerations support solutions. Material considerations for high speed pcb design tempo.
Is fr4 the best board material choice for high speed pcb design. Considerations for high speed pcb track design in 10gbs. At very high frequencies, every trace and pin is an rf emitter and receiver. Avoiding or minimizing this requires that you design target impedance with the objective of establishing and maintaining a fixed or controlled impedance. Design considerations on approach to brenner baseline high.
Extensive research has been done on the best way to design transmission lines so highspeed signals can travel at maximum efficiency. This document is a guideline for designing a carrier board with high speed signals that is used with toradex computer modules. This paper discusses high speed io in fpga and why it is necessary. There has been a lot written on the subject of high speed pcb layout and there are lots of tools available to assist in the process of board design. These optimum sizes also allow for manual rework with a handheld soldering iron and. Top 10 tips for high speed pcb design eagle blog autodesk. Highspeedboard design techniques gonzaga university.
High speed pcb design considerationsprinted circuit board. The most basic tool available is the pcb trace impedance calculator. Board layer stackup considerations for high speed board. The top 10 tips to make your first high speed pcb design project a success. There is a bit of a gray area as to what constitutes a high speed pcb. This via was one of the structures included in the test board for the correlation study investigated in this application note. A pcb design checklist is provided to aid the designer. We shall discuss in this chapter the partitioning of the circuitry, the problem of interconnecting traces, parasitic components, grounding schemes, and decoupling. Emc and systemesd design guidelines for board layout. High speed pcb design rules lesson 4 of advanced pcb layout course. High speed pcb design rules lesson 4 of advanced pcb layout. To reduce potential problems with signal integrity and other transmission issues, its important to make sure your pcb supplier provides boards with a strong design. Export development board and other related industries are in a process of development of industry related yachting, pleasure.
These constraints have forced cad design engineers to use viainpad plated over vippo structures in conjunction with. Design implementation is manageable with flexible architecture, good modelling and layout tools, and good test equipment. Despite its critical nature in highspeed circuitry, printedcircuitboard pcb layout is often one of the last steps in the design process. Design of a superhigh speed perm anent magnet synchronous m otor for cryogenic applications, in electric machines and drives, ieee international conference on, 2005, pp. High speed materials considerations for flex and rigid flex. Pcb and high speed serial interface hssi design guideline. Highspeed board designs introduction a successful high speed printed circuit board pcb requires integration of the devices, pcbs, and other elements into the design. A practical guide to high speed printedcircuit board layout.
Top pcb design guidelines for pcb designers altium. These aspects include pcb line structure, vias, device packaging and backplane connectors. Pcb and high speed serial interface hssi design guidelines ap32174 high speed board design application note 9 v1. The single net connection between n cards, in a multipoint backplane, must be replaced with nn1 unidirectional pointtopoint links. Singleended switching versus differential signaling just about every place you look these days when you talk about high speed pcb design, the signaling. Emc and systemesd design guidelines for board layout about this document scope and purpose this document provides information for emc optimized pcb design and system esd design. Such ios, when integrated into a highly programmable digital environment such as an fpga, allow you to create highperformance designs that were never possible before.
Its goal is to help you implement successful high speed pcbs that integrate devices and other elements. This document is a guideline for printed circuit board pcb layouts and designs associated with highspeed systems. High speed layout guidelines for pcb design cadence. Component placement guidelines focuses on layout best practices for high speed memory design, high speed serdes channel design, and power delivery network design. High speed layout design guidelines nxp semiconductors. Current highspeed designs demand a board designers extensive knowledge of these issues. The board design guidelines solution center provides you with board design related resources for altera devices. Board layer stackup considerations for high speed board design. Standard differential via altera built a test board and constr ucted ansoft hfss simulation models for lab measurement to simulation correlation.
Would you like to find out more about how altium assists its users in the configuration of the board layer stackup for a high speed design. This book discusses the many aspects of highspeed serial designs. Cyclone iv design guidelines march 2012 altera corporation many nextgeneration designs use a current design as a starting point. Pdf high speed electric machines challenges and design. At very high speeds, the copper roughness is a key factor due to the skin effect. Bridges account for approximately half of the total length on chinas pdls. Its goal is to help you implement successful highspeed pcbs that integrate devices and other elements. Apr 15, 2019 with smart high speed layout, you wont run into trouble in your board design. We look at how managing constraints using an integrated tool chain enables todays complex designs to be completed through close collaboration between remote sites. Jan 19, 2015 high speed pcb design rules lesson 4 of advanced pcb layout course. Layout considerations for highpower circuits tutorial maxim.
High speed board design techniques application note advanced micro devices introduction the most important factor in the design of many systems today is speed. Design and construction of high speed, hard chine planing hull. The design of the printed circuit board can be as important as the circuit design to the overall performance of the final system. Guidelines for designing highspeed fpga pcbs intel. If a singlesided pcb is a requirement, remember the trace resistance. Todays board design is not as simple as it was in the past. In todays world of highfrequency signals and fast switching devices, it is highly likely that you have been, or will be, called upon to do high speed pcb design. An6103 pcb routing methodology for superspeed usb 3. A collaborative approach to complex, highspeed board design. Pin connection considerations for board design on page 14. High speed interface layout guidelines 3 high speed differential signal routing 3. Pdf design and construction of high speed, hard chine. The first constraints you should look at are those associated with the bare board. The designer also needs to be an expert concerning board material, signal and power stacking, connectors, cables, vias, and trace dimensions.
Highspeed serial io can be used to solve system interconnect design challenges. Fpga remains best solution for next generation high speed io designs. Mar 24, 2017 main signal integrity pcb layout considerations. Design considerations for high speed pcbs institute of circuit technology. For a certain trace length, the signal needs a certain time to pass it, and this is called the propagation delay time. A practical guide to highspeed printedcircuitboard. A practical guide to highspeed printedcircuitboard layout. Top 5 pcb design guidelines every pcb designer needs to know. For high speed domain boards, small parameter variations can cause large reflections or signal loss. Because a fast slew rate can contribute to noise generation, signal reflection, cross. Shasta thomas, applications engineer bill quach, applications engineer may 16, 2012 abstract. Sep 27, 2018 material properties for high speed pcb design.
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