Precision Circuit Monitors Negative-Supply Thresholds

Abstract:UsinganIC(MAX971)thatincludesanopen-draincomparatorandaprecision1%voltagereference,thiscircuitmonitorsthemagnitudeofanegativesupplyvoltageandprovidesadigitalwarningoffaultconditions.Tomonitormultiplenegativevoltages,usetheMAX974,whichincludesfourcomparators.Maxim>AppNotes>AmplifierandComparatorCircuitsMicroprocessorSupervisorCircuitsVoltageReferencesKeywords:negativesupplyvoltage,multi-railsystems,comparators,voltagereferencesDec07,2010APPLICATIONNOTE4543PrecisionCircuitMonitorsNegative-SupplyThresholdsBy:KevinBilkeAbstract:UsinganIC(MAX971)thatincludesanopen-draincomparatorandaprecision1%voltagereference,thiscircuitmonitorsthemagnitudeofanegativesupplyvoltageandprovidesadigitalwarningoffaultconditions.Tomonitormultiplenegativevoltages,usetheMAX974,whichincludesfourcomparators.AsimilarversionofthisarticleappearedintheFebruary8,2008issueofPortableDesignmagazine.Asimplebutac