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. Despite its critical nature in highspeed circuitry, printedcircuitboard pcb layout is often one of the last steps in the design process. Next discussed is signal integrity and sso considerations support solutions. 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.
Material considerations for high speed pcb design tempo. Top 5 pcb design guidelines every pcb designer needs to know. Some considerations apply to the entire process, while some are specific to particular steps. A collaborative approach to complex, highspeed board design. Most applications for high speed require material with a loss tangent of 0. 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. The board design guidelines solution center provides you with board design related resources for altera devices.
Top 10 tips for high speed pcb design eagle blog autodesk. Pcb and high speed serial interface hssi design guidelines ap32174 high speed board design application note 9 v1. Design considerations on approach to brenner baseline high. Highspeed serial io can be used to solve system interconnect design challenges. Want some more best practices on how to design a board that gets manufactured right the first time. High speed pcb design rules lesson 4 of advanced pcb layout course. 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. Design considerations on approach to brenner baseline highspeed rail connection in austria feb 2008 shani wallis, editor a 2 billion, 40km section of new twintrack railway through the lower inn valley towards the austrian portals of the proposed brenner baseline tunnel connection to italy, is built almost entirely underground.
This via was one of the structures included in the test board for the correlation study investigated in this application note. Board layer stackup considerations for high speed board. These optimum sizes also allow for manual rework with a handheld soldering iron and. A practical guide to highspeed printedcircuitboard layout. Mechanical design considerations for conventionally laminated, highspeed, interior pm synchronous machine rotors article pdf available in ieee transactions on industry applications 403. Highspeed pcb design considerations lattice semiconductor.
The single net connection between n cards, in a multipoint backplane, must be replaced with nn1 unidirectional pointtopoint links. High speed layout guidelines for pcb design cadence. High speed materials considerations for flex and rigid flex. For high speed domain boards, small parameter variations can cause large reflections or signal loss. The top 10 tips to make your first high speed pcb design project a success.
Pdf high speed electric machines challenges and design. This paper discusses high speed io in fpga and why it is necessary. Its goal is to help you implement successful high speed pcbs that integrate devices and other elements. Pin connection considerations for board design on page 14.
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. The first constraints you should look at are those associated with the bare board. There is a bit of a gray area as to what constitutes a high speed pcb. We look at how managing constraints using an integrated tool chain enables todays complex designs to be completed through close collaboration between remote sites. Component placement guidelines focuses on layout best practices for high speed memory design, high speed serdes channel design, and power delivery network design. Be prepared to get creative if the design demands high volume, low cost pcbs.
Pcb and high speed serial interface hssi design guideline. At very high frequencies, every trace and pin is an rf emitter and receiver. Minimize crosstalk differential pairs operate by the principle of coupling. Increasing signal speeds up to 28gbps, board functional density and pcb layer countthickness up to 140 mils are increasing the challenges associated with pcb design, especially with respect to the signal integrity. Design and construction of high speed, hard chine planing hull. Top pcb design guidelines for pcb designers altium. Highspeed board designs introduction a successful high speed printed circuit board pcb requires integration of the devices, pcbs, and other elements into the design. The chinese made crh380 trainsets operate on this line. This book discusses the many aspects of highspeed serial designs.
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. Lattice semiconductor high speed pcb design considerations. We shall discuss in this chapter the partitioning of the circuitry, the problem of interconnecting traces, parasitic components, grounding schemes, and decoupling. Its goal is to help you implement successful highspeed pcbs that integrate devices and other elements. Click the pdf above to read more about high speed design in this ebook. Via optimization techniques for highspeed channel designs figure 1. Jan 19, 2015 high speed pcb design rules lesson 4 of advanced pcb layout course. High speed pcb design rules lesson 4 of advanced pcb layout. This document is a guideline for printed circuit board pcb layouts and designs associated with highspeed systems. Considerations for high speed pcb track design in 10gbs.
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 high speed printedcircuit board layout. Standard differential via altera built a test board and constr ucted ansoft hfss simulation models for lab measurement to simulation correlation. Avoiding or minimizing this requires that you design target impedance with the objective of establishing and maintaining a fixed or controlled impedance. These constraints have forced cad design engineers to use viainpad plated over vippo structures in conjunction with. Highspeedboard design techniques gonzaga university. Mar 24, 2017 main signal integrity pcb layout considerations. These aspects include pcb line structure, vias, device packaging and backplane connectors. And when you have to make considerations of this sort, then your pcb design process will take on a whole new level. Shasta thomas, applications engineer bill quach, applications engineer may 16, 2012 abstract.
Bridges account for approximately half of the total length on chinas pdls. Iopins should be configured as output and driven to static low in the. Singleended switching versus differential signaling just about every place you look these days when you talk about high speed pcb design, the signaling. With the advent of high speed and increasing complexity at the board level, the process of using external layout is under strain. 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. Pdf mechanical design considerations for conventionally. A pcb design checklist is provided to aid the designer. The design of the printed circuit board can be as important as the circuit design to the overall performance of the final system. Design implementation is manageable with flexible architecture, good modelling and layout tools, and good test equipment.
Guidelines for designing highspeed fpga pcbs intel. Special considerations for high speed board design tempo. High speed board design techniques application note advanced micro devices introduction the most important factor in the design of many systems today is speed. Despite its critical nature in high speed circuitry, printedcircuit board pcb layout is often one of the last steps in the design process. A lot of the trace routing that you will do in a high speed design will be the same as what youve always done. 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. Emc and systemesd design guidelines for board layout.
Todays board design is not as simple as it was in the past. Because a fast slew rate can contribute to noise generation, signal reflection, cross. High speed layout design guidelines nxp semiconductors. 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. High speed pcb design rules lesson 4 of advanced pcb. As consumer devices continue to shrink in size, power considerations and appropriate thermal design become increasingly important for circuit designers and board layout engineers. One possible difference is that of length requirements between traces. Adequate return path all the high speed signals have to be routed such a way that the return current flows very close to it. The most basic tool available is the pcb trace impedance calculator. 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. High speed interface layout guidelines 3 high speed differential signal routing 3. This document is a guideline for designing a carrier board with high speed signals that is used with toradex computer modules. The designer also needs to be an expert concerning board material, signal and power stacking, connectors, cables, vias, and trace dimensions. 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.
Layout considerations for highpower circuits tutorial maxim. Fpga remains best solution for next generation high speed io designs. Current highspeed designs demand a board designers extensive knowledge of these issues. High speed pcb design considerationsprinted circuit board. Cyclone iv design guidelines march 2012 altera corporation many nextgeneration designs use a current design as a starting point. The topics covered include pcb design considerations regarding the routing of high speed signals, selecting stackup of the pcb. Pdf design and construction of high speed, hard chine. The board design guidelines solution center provides you with board designrelated resources for altera devices. 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. Export development board and other related industries are in a process of development of industry related yachting, pleasure. So, to sum up, we have to do some considerations and apply the solutions to the above mentioned problems while laying out the pcb.
This application report addresses highspeed signals, such as clock signals and their routing. May 19, 2015 design considerations for high speed pcbs institute of circuit technology. If careful design practices are not followed, the unwanted signals can easily mask those a. Board layer stackup considerations for high speed board design.
An6103 pcb routing methodology for superspeed usb 3. Printed circuit board pcb dielectric construction material controls how much noise and crosstalk is contributed from the fast switching io signals. A practical guide to highspeed printedcircuitboard. Altera devices have fast io pins with fall times as low as 1 ns to 3 ns. If a singlesided pcb is a requirement, remember the trace resistance. Theres a lot to consider regarding pcb layout and design. Sep 27, 2018 material properties for high speed pcb design. Is fr4 the best board material choice for high speed pcb design. Extensive research has been done on the best way to design transmission lines so highspeed signals can travel at maximum efficiency. Apr 15, 2019 with smart high speed layout, you wont run into trouble in your board design. At very high speeds, the copper roughness is a key factor due to the skin effect.
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