2005年3月29日 AllegroMicroSystems公司推出A3245全球第一款適合3.6伏特至24伏特的全極霍爾效應(yīng)傳感器。Allegro全新A3245數(shù)字開關(guān)的全極功能輕松替代簧片開關(guān)，以實(shí)現(xiàn)更高的可靠性和制造的簡(jiǎn)易性，同時(shí)消除信號(hào)條件的要求。.此外，該器件的全極性能還消除了簡(jiǎn)單位置感測(cè)應(yīng)用在制造過(guò)程中的磁鐵定向需求。Allegro專利動(dòng)態(tài)偏移取消實(shí)現(xiàn)了較好的高溫性能，可降低通常由器件超模壓、溫度依存性及熱應(yīng)力引起的剩余偏移電壓。全極功能允許在以下條件下的操作：北極或南極的磁場(chǎng)強(qiáng)度足夠大，就能打開輸出；沒有磁場(chǎng)的時(shí)候，輸出就會(huì)停止。A3245將以下內(nèi)容包含在單硅片上：穩(wěn)壓器、霍爾發(fā)電機(jī)、小型信號(hào)放大器、穩(wěn)定斬波、施密特觸發(fā)器和短路保護(hù)開路集電極輸出。先進(jìn)的BiCMOS晶片加工工藝?yán)昧说碗妷阂?、元件匹配、極低的輸入偏移錯(cuò)誤和小型元件幾何尺寸的優(yōu)勢(shì)。A3245主要面向消費(fèi)、計(jì)算機(jī)/辦公、工業(yè)和汽車市場(chǎng)。A3245系列可在-40 C至+150 C溫度范圍內(nèi)工作，采用兩種封裝類型：三引腳單列直插式封裝(UA)和三引腳表面安裝封裝(LH)。AllegroMicroSystems公司是高級(jí)混合信號(hào)功率半導(dǎo)體和霍爾效應(yīng)傳感器供應(yīng)商，專注服務(wù)于汽車、通訊、計(jì)算機(jī)/辦公自動(dòng)化以及消費(fèi)和工業(yè)市場(chǎng)。其在集成磁性傳感器和集成電動(dòng)機(jī)驅(qū)動(dòng)器產(chǎn)品領(lǐng)域處于領(lǐng)先地位。0755-82501836 13684976689陳小姐QQ:744658389MSN：chen2010123@hotmail.comE-mail：chenling2008456@163.comQQ:744658389經(jīng)銷：霍爾元件，電機(jī)步進(jìn)驅(qū)動(dòng)，傳感器，自恢復(fù)保險(xiǎn)絲，二，三極管，電阻，電容，電感濾波器，磁珠等FeaturesandBenefitsOmnipolaroperationChopperstabilizationSuperiortemperaturestabilityExtremelylowswitchpointdriftInsensitivetophysicalstressReversebatteryprotectionOutputshortcircuitprotectionSolidstatereliabilitySmallsizeRobustEMCcapabilityHighESDratings(HBM)DescriptionTheA3245integratedcircuitisanomnipolar,ultrasensitiveHall-effectswitchwithadigitaloutput.Thissensorhasanintegratedregulatorpermittingoperationto24V,makingitthefirstomnipolarswitchavailableforoperationto24V.Thisdeviceisespeciallysuitedforoperationoverextendedtemperatureranges,upto+150 C.Superiorhigh-temperatureperformanceismadepossiblethroughanAllegro patenteddynamicoffsetcancellation,whichreducestheresidualoffsetvoltagenormallycausedbydeviceovermolding,temperatureexcursions,andthermalstress.TheA3245Hall-effectswitchincludesthefollowingonasinglesiliconchip:voltageregulator,Hall-voltagegenerator,small-signalamplifier,chopperstabilization,Schmitttrigger,andashortcircuitprotectedopen-drainoutput.AdvancedBiCMOSwaferfabricationprocessingisusedtotakeadvantageoflow-voltagerequirements,componentmatching,verylowinput-offseterrors,andsmallcomponentgeometries.TheomnipolaroperationoftheA3245allowsactivationwitheitheranorthorasouthpolarityfieldofsufficientstrength.Intheabsenceofamagneticfield,theoutputisoff.Thispatentedmagnetic-polarity-independencefeaturemakesthisdeviceanexcellentreplacementforreedswitches,withimprovedeaseofmanufacturing,becausetheA3245doesnotrequiremanufacturerstoorienttheirmagnets.Thesedevicesallowsimpleon/offswitchinginindustrial,consumer,andautomotiveapplications.TheA3245isratedforoperationbetweentheambienttemperatures 40 Cand85 CfortheEtemperaturerange,and 40 Cto150 CfortheLtemperaturerange.ThesmallgeometriesoftheBiCMOSprocessallowthesedevicestobeprovidedinultrasmallpackages.Thepackagestylesavailableprovidemagneticallyoptimizedsolutionsformostapplications.PackageLHisanSOT23W,aminiaturelow-profilesurface-mountpackage,whilepackageUAisathree-leadultraminiSIPforthrough-holemounting.Eachpackageisavailableinalead(Pb)freeversion,with100%mattetinplatedleadframes.FunctionalBlockDiagramPartNumberPackageTypeRoHSTemperatureCompliantA3245ELHLT 3-leadSOT No-40 C to 85 CA3245ELHLT-T 3-leadSOT Yes-40 C to 85 CA3245EUA 3-pinSIP No-40 C to 85 CA3245EUA-T 3-pinSIP Yes-40 C to 85 CA3245LLHLT 3-leadSOT No-40 C to 150 CA3245LLHLT-T 3-leadSOT Yes-40 C to 150 CA3245LUA 3-pinSIP No-40 C to 150 CA3245LUA-T 3-pinSIP Yes-40 C to 150 C