UG203-Virtex-5PCB设计指南-Xi

RVirtex-5PCB设计指南UG203(v1.0)2006年12月15日Virtex-5PCB设计指南www.xilinx.com/cnUG203(v1.0)2006年12月15日XilinxisdisclosingthisDocumentandIntellectualProperty(hereinaftertheDesign)toyouforuseinthedevelopmentofdesignstooperateon,orinterfacewithXilinxFPGAs.Exceptasstatedherein,noneoftheDesignmaybecopied,reproduced,distributed,republished,downloaded,displayed,posted,ortransmittedinanyformorbyanymeansincluding,butnotlimitedto,electronic,mechanical,photocopying,recording,orotherwise,withoutthepriorwrittenconsentofXilinx.AnyunauthorizeduseoftheDesignmayviolatecopyrightlaws,trademarklaws,thelawsofprivacyandpublicity,andcommunicationsregulationsandstatutes.XilinxdoesnotassumeanyliabilityarisingoutoftheapplicationoruseoftheDesign;nordoesXilinxconveyanylicenseunderitspatents,copyrights,oranyrightsofothers.YouareresponsibleforobtaininganyrightsyoumayrequireforyouruseorimplementationoftheDesign.Xilinxreservestherighttomakechanges,atanytime,totheDesignasdeemeddesirableinthesolediscretionofXilinx.Xilinxassumesnoobligationtocorrectanyerrorscontainedhereinortoadviseyouofanycorrectionifsuchbemade.XilinxwillnotassumeanyliabilityfortheaccuracyorcorrectnessofanyengineeringortechnicalsupportorassistanceprovidedtoyouinconnectionwiththeDesign.THEDESIGNISPROVIDEDASISWITHALLFAULTS,ANDTHEENTIRERISKASTOITSFUNCTIONANDIMPLEMENTATIONISWITHYOU.YOUACKNOWLEDGEANDAGREETHATYOUHAVENOTRELIEDONANYORALORWRITTENINFORMATIONORADVICE,WHETHERGIVENBYXILINX,ORITSAGENTSOREMPLOYEES.XILINXMAKESNOOTHERWARRANTIES,WHETHEREXPRESS,IMPLIED,ORSTATUTORY,REGARDINGTHEDESIGN,INCLUDINGANYWARRANTIESOFMERCHANTABILITY,FITNESSFORAPARTICULARPURPOSE,TITLE,ANDNONINFRINGEMENTOFTHIRD-PARTYRIGHTS.INNOEVENTWILLXILINXBELIABLEFORANYCONSEQUENTIAL,INDIRECT,EXEMPLARY,SPECIAL,ORINCIDENTALDAMAGES,INCLUDINGANYLOSTDATAANDLOSTPROFITS,ARISINGFROMORRELATINGTOYOURUSEOFTHEDESIGN,EVENIFYOUHAVEBEENADVISEDOFTHEPOSSIBILITYOFSUCHDAMAGES.THETOTALCUMULATIVELIABILITYOFXILINXINCONNECTIONWITHYOURUSEOFTHEDESIGN,WHETHERINCONTRACTORTORTOROTHERWISE,WILLINNOEVENTEXCEEDTHEAMOUNTOFFEESPAIDBYYOUTOXILINXHEREUNDERFORUSEOFTHEDESIGN.YOUACKNOWLEDGETHATTHEFEES,IFANY,REFLECTTHEALLOCATIONOFRISKSETFORTHINTHISAGREEMENTANDTHATXILINXWOULDNOTMAKEAVAILABLETHEDESIGNTOYOUWITHOUTTHESELIMITATIONSOFLIABILITY.TheDesignisnotdesignedorintendedforuseinthedevelopmentofon-linecontrolequipmentinhazardousenvironmentsrequiringfail-safecontrols,suchasintheoperationofnuclearfacilities,aircraftnavigationorcommunicationssystems,airtrafficcontrol,lifesupport,orweaponssystems(High-RiskApplications).XilinxspecificallydisclaimsanyexpressorimpliedwarrantiesoffitnessforsuchHigh-RiskApplications.YourepresentthatuseoftheDesigninsuchHigh-RiskApplicationsisfullyatyourrisk.©2006Xilinx,Inc.Allrightsreserved.XILINX,theXilinxlogo,andotherdesignatedbrandsincludedhereinaretrademarksofXilinx,Inc.PowerPCisatrademarkofIBM,Inc.Allothertrademarksarethepropertyoftheirrespectiveowners.修订历史下表说明此技术文档的修订历史。日期版本修订2006年12月15日1.0Xilinx昀初版本。RVirtex-5PCB设计指南www.xilinx.com/cn3UG203(v1.0)2006年12月15日绪言:关于此指南指南目录...............................................................5其他技术文档...........................................................5其他技术支持资源.......................................................6排版惯例...............................................................6在线技术文档........................................................7第1章:PCB技术基本常识PCB结构..............................................................9迹线...............................................................9平面...............................................................9过孔..............................................................10焊盘和反焊盘.......................................................10焊区..............................................................10尺寸..............................................................10传输线路..............................................................11回流.................................................................12第2章:配电系统必需的PCB去耦电容器.................................................13为每种器件推荐的网络...............................................13XC5VLX器件....................................................15XC5VLXT器件...................................................20替代电容器........................................................22钽电容器.......................................................22陶瓷电容器.....................................................23电容器位置和PCB贴装技术...........................................24钽电容器.......................................................240805陶瓷电容器.................................................240402陶瓷电容器.................................................25去耦网络的基本原理....................................................26噪音限制..........................................................26电感的作用........................................................27电容器寄生电感.....................................................28PCB电流通路电感..................................................29电容器贴装电感..................................................30平面电感.........................