High-Side Positive Current Sensor Monitors Negative Supply

Abstract:Thisapplicationnoteusesahigh-sidecurrent-senseamplifiertomonitorthecurrentfromanegativesupplyvoltage.ThecircuitusestheIC'swidecommon-modeinputrangetoamplifyasmallVsensesignalatthenegativesupplyandlevelshiftituptoapositiveoutputvoltage.Maxim>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSBATTERYMANAGEMENTCIRCUITPROTECTIONMEASUREMENTCIRCUITSKeywords:currentsensor,negativesupply,currentsenseamplifier,negativecurrentmonitor,currentsenseMay11,2003amp,currentmonitorAPPLICATIONNOTE2011High-SidePositiveCurrentSensorMonitorsNegativeSupplyAbstract:Thisapplicationnoteusesahigh-sidecurrent-senseamplifiertomonitorthecurrentfromanegativesupplyvoltage.ThecircuitusestheIC'swidecommon-modeinputrangetoamplifyasmallVsensesignalatthenegativesupplyandlevelshiftituptoapositiveoutputvoltage.Alldedicatedcurrent-senseamplifiersaredesignedforhigh-sidesensingonapositivesupply,butyoucanadaptthemtomonitoranegativesupply(Figur