避免噪音和未使用的运算放大器的电源问题

摘要：如果连接不当，未提交的运放导致功耗增加等问题并添加噪音。本应用指南说明如何正确终止未提交的运算放大器。Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSKeywords:uncommittedopamp,uncommittedoperationalamplifier,unusedopamp,unusedoperationalMar25,2003amplifier,quadopamp,uncommitted,unused,opampAPPLICATIONNOTE1957AvoidingNoiseandPowerProblemswithUnusedOpAmpsAbstract:Ifconnectedimproperly,anuncommittedopampleadstoproblemssuchasincreasedpowerconsumptionandaddednoise.Thisapplicationnoteshowshowtoproperlyterminateanuncommittedopamp.Sometimesthereareoneormoreunusedoperationalamplifiers(opamps)inacircuitdesign.Forexample,Figure2ofApplicationNote994:ReferenceVoltageforMultipleADCsusesthreeofthefouropampsintheMAX4254todrivethereferenceinputsofanADC.Unusedopampsinthissituation