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ADI 高速、混合、微弱信号布线指南.pdf简介：

"ADI 高速、混合、微弱信号布线指南.pdf"这份文件是由Analog Devices, Inc. (ADI)编写的，可能是一份关于电子设计中高速、混合和微弱信号布线的专业技术指南。它可能涵盖了信号完整性、噪声管理、阻抗控制、线路布局和布线策略等方面的内容，旨在帮助工程师在设计高速电子系统时优化信号传输，确保信号质量和系统的性能。这份指南可能包含详细的理论知识、最佳实践和设计技巧，适用于设计和开发需要处理高速数据传输、信号混合处理和微弱信号处理的电路和系统。

ADI 高速、混合、微弱信号布线指南.pdf部分内容预览：

GoodPCB Design!PracticesUnderstanding CapacitorsDifferent types of capacitors..TBADEVICADIConfidential

CaverensHighSpeedPCB Design and LayoutUnderstanding Resistors8008James Bryant's paperTBADEVICADIConfidential

LarerienHighSpeedPCB Design and LayoutChanges in Impedance Across Signal PathtracetracetracecabletraceDevice ADevice BviaviaconnectorconnectorOutputDriverTransmission LineLoadZtypical~500Ztypical 1MQDevice A to Device B, a propagating signal will likelytraverse multiple impedance changes. The largest mismatches will almost always occur at thesource and load.Will generatelargereflections!.Howcanwedeal withthis?Let's look at a story...DEVICEADIConfidential29

《森林火险气象预警 GB/T31164-2014》MESOSEdgar Meets The"Unterminated"Transmission lineAttributes:Pointtopointconnection25OhmimpedanceOutputDriver. 50 ohm impedance Transmission Line (Zo).1MegOhmimpedancereceiverDriverReceiverTransmissionLineADIConfidential

At The StartThe Driver lowers the voltage by from VDD to GND.DRVERADIConfidential32

Edgar Starts for the ReceiverEdgar travels at 6 inches per nanosecondDriverReceiverTransmissionLineDEVICEADIConfidential33

Edgar Returns to the DriverEdgar travels at 6 inches per nanosecond with most of hisoriginal energy!DriverReceiverTransmissionLineADIConfidentialDEVIC35

MESSLarerenaEdgar ls Sent to the Receiver AgainEdgar travels at 6 inches per nanosecondDriverReceiverTransmissionLineADIConfidentialDEVICE

CaveriersEdgar ls Sent to the Driver AgainEdgar travels at 6 inches per nanosecondDriverReceiverTransmissionLineADIConfidentialDEVICE38

LarerierEdgar ls Sent to the Receiver a 'Third TimeEdgar travels at 6 inches per nanosecondDriverReceiverTransmission LineADIConfidentialDEVICE39

everage Ohms' law to minimize the impedance mismatch a

ManagingtheLoadE

Eachmethodhasitsprosandcons.

MENSSDarererHighSpeed PCB Designand'LayoutParallel TerminationParallel resistoratthe receivercanworkwell buthas:.Increases drive current and thus increases power dissipation.IncreasedCrosstalk,IncreasedEMl.Increased ground bounce or supply noise (depending on if theparallel resistor is pulled high or low).DriverDrive currentReceiverabout 50 mATransmission LineDEVICEADIConfidential42

MENSSDarerentHigh Speed PCB Design and 'LayoutSeries TerminationSeries resistoratthe driverisless disruptive:...but the driver impedance is nonlinear and you lose someenergy getting into the transmission lineDriverReceiverTransmission LineADIConfidentialDEVICE43

CaverfersDDR SDRAM TerminationDDRusesDualterminationAtVCC/2=1.25V,loofthedriverisabout14mADriverReceiverVCC/2Transmission LineADIConfidentialDEVICE

MESSCarererEdaarMeets DDR in the'Real WorldThe Series Resistor Plus the Drive impedance is 50 OhmsTheParallelResistoris50OhmsThe Transmission Line Impedance is 60 Ohms (Bad PCB)DriverReceiverVCC/22550WTransmission LineADIConfidentialDEVIC45

TheReceiverisa5oOhmLoadButtheTransmissionLinewas 6o Ohms Due To FR4 Construction and Fabrication Errors TheReflectedEnergyis:

TheReceiverisa5oOhmLoadButtheTransmissionLinewas

[名企]模板支架设计计算原理解析202063PCaverfersEdgaris Reflected+Edgartravels at 6 inches per nanosecondDriverReceiverVCC/2TransmissionLineADIConfidentialDEVICE47

TheDriverisa5oOhmLoadButtheTransmissionLinewas60 OhmsDueToFR4ConstructionandFabricationErrors TheReflectedEnergyis:

TheDriverisa50OhmLoadButtheTransmissionLinewas60

CarerfersEdgaris ReflectedEdgarTravelsat6inchespernanosecond Edgar is now about 1/100 of its original EnergyTherefore Edgar changes the voltage by 1/10 or about 0.2 voltsDriverReceiverVCC/2AWTransmission LineADIConfidentialDEVIC

MESSarererGetting the best performance on our PCBsAsamplifiersandconverters'performanceimprovedachievetheirperformanceonyourPCBwill bechallenging.Layoutguide&designnotestrainingbeforePCBlayoutwill save muchtime in debuggingMovingontoday'strainingMixedSignalPcBLayoutTechniguesSmallSignalPCBLayoutTechniguesStaniar 1.8ADIConfidential

《风力发电机组装配和安装规范 GB/T 19568-2004》The World Leader in High Performance Signal Processing SolutionsMixed Signal PcBLayoutGrounding DataAcguisitionSystemADIANALOGDEVICES

Digital Currents Flowing in AnalogReturn Path Create Error VoltagesCircuSensitiveAnalogSensitive AnalogClockCircuitryDisruptedbyCircuitrysafefromCircuitryDigital SupplyNoiseDigitalSupplyNoiseIpAANALOGDIGITALANALOGDIGITALCIRCUITSCIRCUITS.CIRCUITSCIRCUITSCGNDGND'A + lp'DREFREFIncorrectADIConfidentialCorrectDEVIC55