轨到轨输出和超越摆幅输入：微功率运算放大器的黑幕

摘要：一个低功率/低电压运算放大器的输入电压范围在什么时候成为重要的呢？电池供电的手持系统设计时，你应该选择什么运算放大器？Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSKeywords:CMVR,CMRR,inputvoltagerange,railtorailinputs,beyondtherailinputs,opamps,lowvoltageMar23,2001opamp,lowvoltageamplfiersAPPLICATIONNOTE741Rail-to-RailOutputsandBeyond-the-RailsInputs:TheInsideStoryonMicropowerOpAmpsAbstract:Whendoestheinputvoltagerangeofalowpower/lowvoltageopampbecomeimportant?Whatoperationalamplifiershouldyouchoosewhendesigningabatterypoweredhandheldsystem?Tooptimizeperformanceintoday'slow-powerhandheldsystems,designersmustpayincreasingattentiontothecommon-modeinputvoltagerange,outputvoltageswing,noise,andsupplycurrentofsingle-supplymicropoweropamps.Differentialopampsusuallyincludethenegativerailin