从负过电压保护电流检测放大器

摘要：电流检测放大器通常远高于地面操作，但故障条件下可以推动地面以下的感觉输入，绘制通过ESD保护二极管的电流过大损坏设备。该电路保护系列晶体管，每个输入连接PMOS管阻塞特定的高边电流检测放大器（MAX4080）。

Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP4837Maxim>Designsupport>Appnotes>CircuitProtection>APP4837Keywords:current-senseamplifiers,negativefaultvoltage,ESD-protectiondiodesFeb09,2011APPLICATIONNOTE4837ProtectCurrent-SenseAmplifiersfromNegativeOvervoltageBy:ArpitMehta,StrategicApplicationsEngineerPrashanthHolenarsipurAbstract:Current-senseamplifiersnormallyoperatewellaboveground,butafaultconditioncandrivethesenseinputsbelowground,damagingthedevicebydrawingexcessivecurrentthroughtheESD-protectiondiodes.Thiscircuitprotectsaparticularhigh-sidecurrent-sense