容错模拟开关

摘要：下面的讨论中介绍了Maxim的新的并行检测故障保护架构的优势超过传统的系列场效应管的方法。Maxim>AppNotes>SWITCHESANDMULTIPLEXERSKeywords:fault-protection,analogswitch,CMOSanalogmultiplexers,overvoltage,zenerclamp,parallelMar25,2001sense,seriesprotectiondiodes,faultprotectedswitches,analogmultiplexerAPPLICATIONNOTE745Fault-TolerantAnalogSwitchesAbstract:ThefollowingdiscussiondescribestheadvantagesofMaxim'snewparallelsensefault-protectionarchitectureoverthetraditionalseries-FETsapproach.Incertainapplications,boarddesignersaddcircuitrytoprotectanalog-switchinputsfromvoltagesthatexceedthesupplyrails.Whenthesevoltagesarepresent,notonlymusttheswitchsurvivethem,butalso―toprotectthecircuitrydownstreamfromtheswitch―thevoltagefromtheswitch'soutputmustremainwithinitssupplyrails.