A3282 Chopper-StabilizedHall-EffectLatchFeaturesChopperstabilizationSuperiortemperaturestabilityExtremelylowswitchpointdriftInsensitivetophysicalstressReversebatteryprotectionOutputshortcircuitprotectionSolidstatereliabilitySmallsizeRobustEMCcapabilityHighESDratings(HBM)DescriptionTheA3282Hall-effectsensorisatemperaturestable,stress-resistantlatch.Superiorhigh-temperatureperformanceismadepossiblethroughanAllegro patenteddynamicoffsetcancellationthatutilizeschopper-stabilization.Thismethodreducestheoffsetvoltagenormallycausedbydeviceovermolding,temperaturedependencies,andthermalstress.TheA3282complementsthecurrentAllegrofamilyofchopper-stabilizedlatchingsensors.TheA3282includesthefollowingonasinglesiliconchip:voltageregulator,Hallvoltagegenerator,small-signalamplifier,chopperstabilization,Schmitttrigger,andashortcircuitprotectedopen-drainoutput.AdvancedBiCMOSwaferfabricationprocessingisusedtotakeadvantageoflow-voltagerequirements,componentmatching,verylowinput-offseterrors,andsmallcomponentgeometries.Thisdevicerequiresthepresenceofbothsouthandnorthpolaritymagneticfieldsforoperation.Inthepresenceofasouthpolarityfieldofsufficientstrength,thedeviceoutputlatcheson,andonlyswitchesoffwhenanorthpolarityfieldofsufficientstrengthispresent.TheA3282isratedforoperationbetweentheambienttemperatures 40 Cand85 CfortheEtemperaturerange,and 40 Cto150 CfortheLtemperaturerange.Thetwopackagestylesavailableprovidemagneticallyoptimizedsolutionsformostapplications.PackageLHisanSOT23W,aminiaturelow-profilesurface-mountpackage,whilepackageUAisathree-leadultraminiSIPforthrough-holemounting.Eachpackageisavailableinalead(Pb)freeversion,with100%mattetinplatedleadframes.FunctionalBlockDiagram