Tkool Electronics

therefore check their pin configurations before replacing in your circuit).

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therefore check their pin configurations before replacing in your circuit).

push({});Features / Technical SpecificationsPackage Type: TO-92Transistor Type: NPN Max Collector Current(IC): -150mAMax Collector-Emitter Voltage (VCE): -50VMax Collector-Base Voltage (VCB): -50VMax Emitter-Base Voltage (VEBO): -5VMax Collector Dissipation (Pc): 400 miliWattMax Transition Frequency (fT): 80 MHzMinimum Maximum DC Current Gain (hFE): 70 – 400Max Storage Operating temperature Should Be: -65 to +150 CentigradeNPN ComplementaryNPN Complementary of A1015 is C1815.ApplicationsAudio Preamplifiers CircuitsAudio Amplifier CircuitsAudio amplification StagesSwitching Loads under 150mAHow to Safely Long Run in a CircuitTo get long term and stable performance from this transistor in your circuits always stay under its maximum specification values like do not drive load more than 150mA

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ApplicationsAudio Preamplifiers CircuitsAudio Amplifier CircuitsAudio amplification StagesSwitching Loads under 150mAHow to Safely Long Run in a CircuitTo get long term and stable performance from this transistor in your circuits always stay under its maximum specification values like do not drive load more than 150mA.The max collector dissipation of the transistor is 400mW and max DC current gain is 400 which makes this transistor a better device for small audio amplificationWhen using it as a switch it can handle 800mA load that can drive multiple relays.

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the user should not drive load more than 800mA with this transistor.push({});Features / technical specificationsPackage Type: TO-39Transistor Type: NPNMax Collector Current(IC): 8A or 800mAMax Collector-Emitter Voltage (VCE): 30VMax Collector-Base Voltage (VCB): 60VMax Emitter-Base Voltage (VEBO): 5VMax Collector Dissipation (Pc): 8 Watt Or 800mWMax Transition Frequency (fT): 250 MHzMinimum Maximum DC Current Gain (hFE): 100 – 300Max Storage Operating temperature Should Be: -65 to +150 CentigradePNP ComplementaryPNP Complementary of 2N2219 is 2N2905 Replacement and Equivalent2N2218.

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Also if you require a BJT transistor that have a higher operating temperature as compare to TO-92 package transistors mentioned above.

2N2219A2N2219 Transistor Explained / Description2N2219 is a perfect transistor if you are looking for a little bit high power general purpose transistor in place of general purpose TO-92 package transistor like 2N2222.TL072isaOp-AmpIC.ThisblogcoversTL072OpAmppinout,datasheet,equivalent,features,andotherinformationonhowtouseandwheretousethisdevice.CatalogTL072PinoutTL072CircuitTL072ApplicationsTL072FeaturesTL072AdvantageTL072PackageTL072ParametersTL072ManufacturerTL072DocumentsTL072ProductComplianceWheretouseTL072HowtouseTL072ComponentDatasheetFAQTL072PinoutPINNo.PinNameDescription11OUTOutputoffirstop-amp21IN-Invertinginputforfirstop-amp31IN+Non-invertinginputforfirstop-amp4Vcc-Ground52IN+Non-invertinginputforfirstop-amp62IN-Invertinginputforfirstop-amp72OUTOutputofsecondop-amp8Vcc+SupplyvoltageTL072CircuitInvertingAmplifierSingle-SupplyUnityGainAmplifier0.5-HzSquare-WaveOscillatorHigh-QNotchFilter100-kHzQuadratureOscillatorACAmplifierTL072ApplicationsAudiomixersACinvertersVFdrivesOscilloscopesSystemswithDLPfrontprojectionSolarinvertersUninterruptiblePowerSupply(UPS)Quadrupleoscillator,acompletecircuitdesignedisshowninthefigurebelowTL072FeaturesWidecommonmodevoltageLowbiasvoltageLowinputoffsetcurrentLownoiseLowpowerconsumptionInternalfrequencycompensationHighslewratesLatch-upfreeoperationOutputshortcircuitprotectionTL072AdvantageTL072isbasicallyahigh-speedJunctionFieldEffectTransistor(JFET).ItisalsoknownastheDualOperationalAmplifier.IthasabipolartransistorandhighvoltageJFETinitscase.TL-072simportantfeaturesincludelowoffsetcurrent,highslewrates,lowinputvoltage,lowoffsettemperaturecoefficient,etc.Someofthemajorfeaturesmayincludelowpowerconsumption,lownoise,common-modeinputvoltagerangeincludesVcc,latch-upfreeoperationetc.TL072hasaverywiderangeofapplicationsincludingoscilloscope,solarinverter,ACinvertersandVFdrives,audiomixers,Un-interruptablePowerSupply(UPS),etc.FurtherdetailaboutTL-072willbegivenlaterinthistutorial.TL072PackagePDIP(P)SOIC(D)SOP(PS)TSSOP(PW)TL072ParametersNumberofchannels(#)2Totalsupplyvoltage(Max)(+5V=5,+/-5V=10)30Totalsupplyvoltage(Min)(+5V=5,+/-5V=10)7Rail-to-railIntoV+GBW(Typ)(MHz)3Slewrate(Typ)(V/us)13Vos(offsetvoltage@25C)(Max)(mV)6Iqperchannel(Typ)(mA)1.4Vnat1kHz(Typ)(nV/rtHz)18RatingCatalogOperatingtemperaturerange(C)-40to85,0to70Offsetdrift(Typ)(uV/C)18FeaturesStandardAmpsInputbiascurrent(Max)(pA)200CMRR(Typ)(dB)100Outputcurrent(Typ)(mA)10ArchitectureFETTL072ManufacturerTexasInstrumentsIncorporated(TI)isaglobalsemiconductordesignandmanufacturingcompanythatdevelopsanalogICsandembeddedprocessors.Byemployingtheworldsbrightestminds,TIcreatesinnovationsthatshapethefutureoftechnology.TIishelpingmorethan100,000customerstransformthefuture,today.TL072DocumentsEOLProductWithdrawal/DiscontinuanceNotification(PDF)PCNQualificationofNewMoldCompoundforselectedDevicesinthePDIPpackage(PDF)TL072ProductComplianceUSHTS8542330001CAHTS8542330090CNHTS8542319000MXHTS85423301TARIC8542330000ECCNEAR99WheretouseTL072TL072ismainlyusedwherehigh-accuracyisneededwithrespecttolowharmonicandnoise,asusedforaudiopre-amplification.Theaudiopre-amplificationmeansforgettingoutputaudiowithlownoise,interference,distortionandalsousedforcontrollingthevolume,bassandtreble.Italsocomparesthevoltageliketheotherop-ampICsdo.So,canbeusedasavoltagecomparatorIC.HowtouseTL072WecanusethisICforaudiopre-amplificationorforbettersoundqualitywithhavingalowpriceofitwithahighaccuracy.Inthecircuit,astheaudioinputisattacheditwillreceivefromtheoutputwithlownoiseanddistortion.WecanincreasethevalueofresistorR4duetohavinghighinputimpedance.R1isusedforimpedancebalancing,whichhelpsingettinglowdistortion.R2andR3arenegativefeedbackresistors,usedformeasuringtheoutputsignal.IfthevalueofR2andR3isplacedtoohighthenthenoisewillincreaseandifitistoolowthenthenoisewillbelower,butitmayincreasedistortionastheloadonICgetshigh.R6isusedtodischargeoremptytheC2flowsinordertoreducenoisestrikes.ComponentDatasheetTL072DatasheetFAQWhatisTL072?TL072isaJunctionFieldEffectTransistorabbreviatedasJFET.Sometimesitisalsoknownasdualoperationalamplifier.Ithasseveraldifferentamazingfeaturesincludinglownoise,lowpowerconsumption,highslewrates,latch-upfreeoperation,lowtemperaturecoefficient.HowManyOp-AmpsDoesTL072Have?Twoopamps.TL072Features:Havingtwoop-ampinsideorcalledasdualop-ampIC.IsTL072Rail-to-Rail?Themaximumis3.5V,andthepeaktopeaksignalisonly2V.At0Vto3Vpowersupply,theTL072isuseless,becauseithaslittleornooutputswingleft.Arail-to-railopampwouldswingfromnearlythemost-negativesupplytonearlythemost-positivesupply.WhatDoesTL072Mean?TL072isaJunctionFieldEffectTransistorabbreviatedasJFET.Sometimesitisalsoknownasdualoperationalamplifier.Ithasseveraldifferentamazingfeaturesincludinglownoise,lowpowerconsumption,highslewrates,latch-upfreeoperation,lowtemperaturecoefficient.WhatisTL072IC?TL072ICisahigh-voltageJFET-inputoperationalamplifierwithlownoiseversionsandhighslewrate.TheInputbiasandOffsetcurrentsisalsolow.WhatisaTL071Amplifier?TheTL071isahigh-speedJFETinputsingleoperationalamplifier.ThisJFETinputoperationalamplifierincorporateswellmatched,high-voltageJFETandbipolartransistorsinamonolithicintegratedcircuit.Thedevicefeatureshighslewrates,lowinputbiasandoffsetcurrents,andlowoffsetvoltagetemperaturecoefficient.WhatisICTL07X?ItsadualOp-ampICmeansitcontaintwoop-ampinside.ThisTL07xseriescomewithlowharmonicdistortionandlownoisewhichmakesitfirfortheusewherehigh-accuracyneeded.Italsousedintheapplicationofaudiopre-amplification.

BD139isaNPNTransistor.ThisblogcoversBD139Transistorpinout,datasheet,equivalent,features,andotherinformationonhowtouseandwheretousethisdevice.CatalogBD139CADModelBD139PinoutBD139ApplicationsBD139FeaturesBD139AdvantageBD139PackageBD139ParametersBD139ManufacturerBD139DocumentsBD139EnvironmentalandExportClassificationsBD139ProductComplianceBD139EquivalentsBD139AlternativesWheretouseBD139HowtoSafelyLongRunBD139inCircuitBD139PopularitybyRegionBD139MarketPriceAnalysisComponentDatasheetFAQBD139CADModelBD39SymbolBD139FootprintBD1393DModelBD139PinoutPinNumberPinNameDescription1EmitterCurrentDrainsoutthroughemitter,normallyconnectedtoground2CollectorCurrentflowsinthroughcollector,normallyconnectedtoload3BaseControlsthebiasingoftransistor,UsedtoturnONorOFFthetransistor.BD139ApplicationsSwitchingcircuitsRFAmplifierscircuitAudioamplifiersapplicationsAmplificationcircuitsLoaddrivercircuitsBD139FeaturesPlasticcasing:NPNTransistorAvailablePackage:TO-126ContinuousCollectorcurrent(IC):1.5ACollector-Emittervoltage(VCE):80VCollector-Basevoltage(VCB):80VEmitterBaseBreakdownVoltage(VEBO):5VCollectorDissipation(Pc):5WattMaxTransitionFrequency(fT):190MHzDCCurrentGain(hFE):25250MaxStorageOperatingtemperature:-55to+150CentigradeBD139AdvantageBD139NPNTransistorBD139isaNPNtransistorhencethecollectorandemitterwillbeleftopen(Reversebiased)whenthebasepinisheldatgroundandwillbeclosed(Forwardbiased)whenasignalisprovidedtobasepinBD139hasagainvalueof40to160,thisvaluedeterminestheamplificationcapacityofthetransistor.ThemaximumamountofcurrentthatcouldflowthroughtheCollectorpinis1.5A,hencewecannotconnectloadsthatconsumemorethan1.5Ausingthistransistor.Tobiasatransistorwehavetosupplycurrenttobasepin,thiscurrent(IB)shouldbelimitedto1/10thofthecollectorcurrentandvoltageacrossthebaseemitterpinshouldbe5Vmaximum.Whenthistransistorisfullybiasedthenitcanallowamaximumof1.5Atoflowacrossthecollectorandemitter.ThisstageiscalledSaturationRegionandthetypicalvoltageallowedacrosstheCollector-Emitter(VCE)orBase-Emitter(VBE)couldbe80V.Whenbasecurrentisremovedthetransistorbecomesfullyoff,thisstageiscalledastheCut-offRegion.TheBD139wasoriginallymanufacturedbyPhillipsratedat160MHzforspecificaudioapplications,latertheywereclonedbyothermanufacturerslikeSamsung,STetc.BD139PackageBD139ParametersMfrSTMicroelectronicsSeries-PackageTubePartStatusActiveTransistorTypeNPNVceSaturation(Max)@Ib,Ic500mV@50mA,500mACurrent-CollectorCutoff(Max)100nA(ICBO)DCCurrentGain(hFE)(Min)@Ic,Vce40@150mA,2VFrequency-Transition-OperatingTemperature150C(TJ)MountingTypeThroughHolePackage/CaseTO-225AA,TO-126-3SupplierDevicePackageSOT-32-3Current-Collector(Ic)(Max)1.5AVoltage-CollectorEmitterBreakdown(Max)80VPower-Max1.25WBaseProductNumberBD139BD139ManufacturerSTMicroelectronicsisaglobalindependentsemiconductorcompanyandisaleaderindevelopinganddeliveringsemiconductorsolutionsacrossthespectrumofmicroelectronicsapplications.Anunrivaledcombinationofsiliconandsystemexpertise,manufacturingstrength,IntellectualProperty(IP)portfolioandstrategicpartnerspositionstheCompanyattheforefrontofSystem-on-Chip(SoC)technologyanditsproductsplayakeyroleinenablingtodaysconvergencetrends.BD139DocumentsResourceTypeLinkOtherRelatedDocumentsBD139ViewAllSpecificationsFeaturedProductPowerBipolarTransistorsHTMLDatasheetBD135-136,139-140EDA/CADModelsBD139byUltraLibrarianSimulationModelsBD139SpiceModelBD139EnvironmentalandExportClassificationsAttributeDescriptionRoHSStatusROHS3CompliantMoistureSensitivityLevel(MSL)1(Unlimited)BD139ProductComplianceUSHTS8541290095CAHTS8541290000CNHTS8541210000JPHTS8541290100KRHTS8541299000MXHTS85412101TARIC8541210000ECCNEAR99BD139EquivalentsBD136,BD138,BD140,BD230,2SC5171S,BD349,andBD379BD139AlternativesD882WheretouseBD139ThistransistorfirstlymanufacturedbyPhilipsratedat160MHzspeciallyforaudioapplications,lateritwasclonedbyothermanufacturerslikeST,Samsungetc.Duetohighcollectorcurrentof1.5Athistransistorcanbeusedtocontrol(On/Off)highloadsthatconsumelessthan1.5A.Thesaturationvoltages(BaseEmitterVoltageVBE)ofonly5V,thismakesiteasytouseindigitalelectronicswhichhasanoperatingvoltageof5V.Itcomesinplasticjacketthatiswayitscostisverysmallandthemostimportantfeatureofplasticjacketisthatitwillnotbeeffectbyothernoise.HowtoSafelyLongRunBD139inCircuitTosafelyrunthistransistorinyourcircuitorelectronicprojectsdonotoperatethistransistorfromvoltagehigherthan80V,donotdriveloadmorethan1.5Aor1500mAanduseasuitableheatsinkwiththetransistor.Alsouseasuitablebaseresistortoproviderequiredbasecurrent.Theminimumandmaximumsurvivaltemperatureofthistransistoris-55to+150Centigradethereforedonotexposeittotemperaturesabove+150centigradeandbelow-55centigrade.BD139PopularitybyRegionBD139MarketPriceAnalysisComponentDatasheetBD139DatasheetFAQWhatisBD139?BD139isaBipolarNPNtransistor,itismountedintheSOT-32plasticpackage.Itisdesignedforaudioamplifieranddriverutilizingcomplementarycircuits.BD139hasagainvalueof40to160,whichdeterminetheamplificationcapacityofatransistor.WhatisaBD139Transistor?BD139isaNPNtransistorhencethecollectorandemitterwillbeleftopen(Reversebiased)whenthebasepinisheldatgroundandwillbeclosed(Forwardbiased)whenasignalisprovidedtobasepinBD139hasagainvalueof40to160,thisvaluedeterminestheamplificationcapacityofthetransistor.WhatAretheTypesofNPNTransistors?TheNPNtypesareBD135BD137/BD139NPNSILICONTRANSISTORSSGS-THOMSONPREFERREDSALESTYPESDESCRIPTIONTheBD135,BD137andBD139aresiliconepitaxialplanarNPNtransistorsinJedecSOT-32plasticpackage,designedforaudioamplifiersanddriversutilizingcomplementaryorquasicompementarycircuits.WhatistheReplacementfortheBD139?TheSMDversionoftheBD139isavailableastheBCP56(SOT-223).YoucanreplacetheBD139withtheBD139G,BD169,BD179,BD230,BD237,BD237G,BD379,BD789,BD791,MJE242,MJE244orMJE722WhatistheComplementaryPnptransistortotheBD139?ThecomplementaryPNPtransistortotheBD139istheBD140.SMDEquivalentTheSMDversionoftheBD139isavailableastheBCP56(SOT-223).ReplacementandequivalenttransistorfortheBD139YoucanreplacetheBD139withtheBD139G,BD169,BD179,BD230,BD237,BD237G,BD379,BD789,BD791,MJE242,MJE244orMJE722.ThisarticlewillintroducetheprocessofusingAD590todesignahigh-precisiondigitalthermometer.AD590isacommonlyusedT/Iconverter.Itisacurrentoutputtypetwo-endtemperaturesensormadebyADcompanyusingtherelationshipbetweenPNjunctionforwardcurrentandtemperature.Whenthemeasuredtemperatureisconstant,itisequivalenttoaconstantcurrentsource.AD590hasthecharacteristicsofhighmeasurementaccuracy,goodlinearityandstronginterchangeability.Whenthepowersupplyvoltagechangesbetween5to15V,theoutputcurrentchangeslessthan1A.CatalogI.AD590Introduction1.1AD590FunctionandStructure1.2AD590PerformanceCharacteristics1.3AD590WorkingPrincipleII.DesignofDigitalDisplayThermometer2.1AD590InternalCircuit2.2DesignofTemperatureMeasurementCircuit2.3A/DConversionandDisplayCircuitDesignIII.ConclusionFAQOrderingQuantityI.AD590Introduction1.1AD590FunctionandStructureAD590isacurrent-typetemperaturesensorthatusescurrentasanoutputtoindicatetemperature.Accordingtothedifferentcharacteristics,AD590usesthesuffixI,J,K,L,Mtodividegears.AD590LandAD590Maregenerallyusedinprecisiontemperaturemeasurementcircuits.TheappearancestructureisshowninFigure1below.Itispackagedinametalroundshellwith3pins,wherepin1isthepositiveterminalofthepowersupply+;pin2isthecurrentoutputterminal-;3Thepinisthegroundterminalofthetubeshellandisgenerallynotused.ThecircuitsymbolisshowninFigure2below.Figure1ThemetalroundshellpackagestructureofAD590Figure2ThecircuitsymbolofAD5901.2AD590PerformanceCharacteristics(1)Wideworkingvoltagerange:4~30V;(2)Widetemperaturemeasurementrange:-55~+150℃;3)Linearcurrentoutput:1A/K,(4)Excellentlinearity:thenon-linearerrorinthetemperaturemeasurementrangeislessthan0.3℃(AD590M);(5)Laserfine-tuningmakesthecalibrationtemperaturereach:0.5℃(AD590M);(6)Maximumforwardvoltage:+44V;(7)Maximumreversevoltage:-20V;(8)Storagetemperature:-65~+175℃.1.3AD590WorkingPrincipleWhenthemeasuredtemperatureisconstant,AD590isequivalenttoaconstantcurrentsource.Connectittoa5-30VDCpowersupply,andconnecta1kconstant-valueresistorinseriesattheoutputend.Then,thecurrentflowingthroughthisresistorwillbeThemeasuredtemperatureisproportional,andtherewillbeavoltagesignalof1mV/Kacrosstheresistor.ItsbasiccircuitisshownasinFig.3.Figure3ThecorecircuitofthetemperaturesensingpartFigure3isthecorecircuitofthetemperaturesensingpartoftheintegratedPNjunctionsensorusingtheUBEcharacteristic.Amongthem,T1andT2playaconstantcurrentrole,whichcanbeusedtomakethecollectorcurrentsI1andI2oftheleftandrightbranchesequal;T3andT4aretransistorsfortemperaturesensing.Thematerialsandprocessesofthetwotubesareexactlythesame,butT3isessentiallyItismadeupofntransistorsinparallel,soitsjunctionareaisntimesthatofT4.TheemissionjunctionvoltagesUBE3andUBE4ofT3andT4areconnectedinserieswiththereversepolaritytotheresistorR,sotheupperendvoltageofRisUBE.Therefore,thecurrentI1is:I1=UBE/R=(KT/q)(lnn)/RForAD590,n=8,inthisway,thetotalcurrentofthecircuitwillbeproportionaltothethermodynamictemperatureT,andleadthiscurrenttotheloadresistanceRLtogetanoutputvoltageproportionaltoT.Duetotheuseofconstantcurrentcharacteristics,theoutputsignalisnotaffectedbythepowersupplyvoltageandwireresistance.TheresistorRinFigure3isathin-filmresistorformedonasiliconboard.Theresistorhasbeenlaser-correctedforitsresistancevalue,soanIvalueof1A/Kcanbeobtainedatthereferencetemperature.II.DesignofDigitalDisplayThermometer2.1AD590InternalCircuitFigure4showstheinternalcircuitofAD590.VT1toVT4inthefigureareequivalenttoVT1andVT2inFigure3,andVT9andVT11areequivalenttoVT3andVT4inFigure3.R5andR6arelowtemperaturecoefficientresistorsmadebythinfilmtechnology.ThefunctionofVT6istobalancethecollectorvoltageofVT7andVT8.Figure4TheinternalcircuitofAD590VT5,VT12andVT10arestart-upcircuits,andVT5isaconstantbiasdiode.VT10isnotconnectedtothesubstrate,butisconnectedtoR3toisolatethesubstratecapacitanceandpreventthesubstratecapacitancefromaffectingthefrequencystability.VT6canalsobeusedtopreventdamagetothecircuitwhenthepowersupplyisreversed.R1andR2areemitterfeedbackresistors,whichcanbeusedtoincreaseimpedance.VT1~VT4areconnectionmethodsdesignedforthermaleffects.C1andR4areusedtopreventparasiticoscillation.ThedesignofthecircuitmakestheemittercurrentsofVT9,VTl0,andVT11equal,andtheyarealso1/3ofthetotalcurrentIoftheentirecircuit.ThelaunchjunctionarearatioofVT9andVT11is8:1,andthelaunchjunctionareaofVT10andVT11isequal.TheemitterjunctionvoltagesofVT9andVT11areconnectedinserieswithoppositepolaritytotheresistorsR5andR6,so:△UBE=(R6-2R5)I/3,fromtheaboveformula,wecanseethatincreasingR5anddecreasingR6willmake△UBEdecreases,buttheeffectofchangingR5on△UBEismoresignificantbecausethecoefficientinfrontofitislarger.Intheproductionprocess,lasercorrectionR5isusedforcoarseadjustment,andR6iscorrectedforfineadjustment,andfinallyitsoutputcurrentlis1A/K.2.2DesignofTemperatureMeasurementCircuitBecauseAD590isacurrentoutputdevice,whendesigningatemperaturemeasurementcircuit,firstconvertcurrentintovoltage.Whenthetemperatureincreasesby1K,thecurrentoftheAD590increasesby1A.WhentheoutputcurrentofAD590passesthrougha10kresistor,thevoltagedroponthisresistoris10mV,whichisconvertedinto10mV/K.Inordertomakethisresistanceaccurateto0.1%,a9.6kresistoranda1kprecisionpotentialcanbeused,.Thedeviceisconnectedinseries,andaprecise10kresistanceisobtainedbyadjustingtheprecisionpotentiometer.Figure5showsacurrentvoltageandabsoluteCelsiustemperaturescaleconversioncircuit,inwhichtheoperationalamplifierA1isconnectedtotheformofavoltagefollowertoincreasetheinputimpedanceofthesignal.ThefunctionoftheoperationalamplifierA2istoconverttheabsolutetemperaturescaleintoaCelsiustemperaturescale,inputaconstantvoltage(suchas1.365V)tothenon-invertinginputterminalofA2,andthenadjustRP2toamplifythisvoltageto2.730V.Inthisway,thevoltagebetweentheoutputterminalsofA1andA2isthevoltagecorrespondingtotheconvertedCelsiustemperaturescale.Figure5CurrentVoltageandAbsoluteCelsiusTemperatureConversionCircuitPutAD590intotheice-watermixedsolutionat0℃,adjustRP1sothattheoutputvoltageofA1is2.730V,adjustRP2sothattheoutputvoltageofA2isalso2.730V,sothevoltagebetweenthetwooutputterminalsofA1andA2:2.730-2.730=0V,whichcorrespondsto0C.2.3A/DConversionandDisplayCircuitDesignTherearetwoschemesfordesigningA/Dconversionanddisplaycircuits:(1)RealizewithA/DconverterMC14433First,theoutputcurrentofAD590isconvertedintovoltage.Sincethissignalisananalogsignal,itisnecessarytoconvertthissignalintoadigitalsignalfordigitaldisplay.TheconversioncircuitusingMC14433isshowninFigure6.ThefunctionofthiscircuitistoconvertanalogsignalsintodigitalsignalsthroughtheA/DconverterMC14433tocontrolthedisplaycircuit.Amongthem,MC14511isadecoding/latch/drivecircuit,itsinputisBCDcode,anditsoutputisaseven-segmentdecoding.TheLEDdigitaldisplayisdrivenbytheMC14433bitselectionsignalsDS1~DS4throughtheDarlingtonarrayMC1413,andtheDS1andQ2terminalsoftheMC14433controlthedisplayof+and-temperature.WhenDS1=1andQ2=1,thedisplayispositive;whenQ2=0,thedisplayisnegative.Figure6BlockdiagramofA/Dconversionanddigitaldisplaycircuit(2)RealizewithICL7106A/DconversionandLCDdisplaycircuitblockdiagramusingICL7106isshowninFigure7.Amongthem,ICL7106isa3andahalfdisplayA/Dconversioncircuit,whichcontainsaliquidcrystaldisplaydrivecircuit,whichcanbeusedforA/DconversionandLCDdisplaydrive.Figure7A/DconversionandLCDdisplaycircuitblockdiagramIII.ConclusionAD590hastheadvantagesofexcellentlinearity,stableperformance,highsensitivity,nocompensation,smallheatcapacity,stronganti-interferenceability,remotetemperaturemeasurementandconvenientuse.Itcanbewidelyusedinvarioustemperaturemeasurementandcontrolfieldssuchasrefrigerators,airconditioners,granaries,icestorages,andindustrialequipment.ThedigitaldisplaythermometerdesignedinthisarticlebasedonAD590hasbeenappliedinmanyfields.FAQWhatisAD590?AD590isatemperaturesensor,thecurrentoutputsensitivityis1A/℃,thestandardoutputvalueis298.2Aat25℃,andtheworkingvoltagerangeis4~30V.WhatarethecharacteristicsofAD590temperaturesensor?Singlefunction(onlytemperaturemeasurement),smalltemperaturemeasurementerror,lowprice,fastresponsespeed,longtransmissiondistance,smallsize,micropowerconsumption,etc.Itissuitableforremotetemperaturemeasurementandtemperaturecontrolwithoutnon-linearcalibration.Theperipheralcircuitissimple.HowtodetectthequalityofAD590?AD590hasacurrentof273mAat0.Because2113isaWensensitiveresistor5261,itmeansthatitisgreatlyaffectedbythesurroundingtemperature4102.Itisverydifficulttomeasurewithoutrelyingon1653othertools.Giveyousomesuggestions.Whentheambienttemperaturerisesbyonedegree,thecurrentofAD590increasesby1uA.WhatyouhavetodoistoworkwithAD590simultaneouslywiththehelpofahigh-precisiontemperaturetestinstrument.AfterAD590series10Kresistance,measureitsvoltage,thatistosay,itshouldbe2.73Vat0,and2.98Vatroomtemperature25.Forhigheraccuracy,itisrecommendedthatyouusetheelectronicbuildingblocksoftwareArdunioformeasurement,andputthecorrespondingdataintoMATLABforlinearregression.Thebetterthelinearity,themorestablethemeasurement.AD590isnotahigh-precisiontemperaturetestingdevice.Ifhigh-precisiontestingisrequired,othercomponentsarerecommended.WhatisthedifferencebetweenAD590andPT100?AD590isacurrent-typetemperaturesensor.Itconvertstemperaturechangesintocurrentconversion.Thesimplestprocessingistopassaresistor(10K)aftertheoutputtoconvertthecurrentintoavoltage,andthenthroughthedetectionvoltage,thecurrentatthistimecanbededuced.Usetherelationshipbetweencurrentandtemperatureinthesensordatatocalculatethecurrenttemperature.PT100isaresistancetypetemperaturesensor,whichconvertstemperaturechangesintoresistancechanges.ThesimplestprocessistoplacePt100inabridge,usethevoltagedifferenceatthemidpointofthebridgearm,anduseadifferentialamplifiercircuit(instrumentamplifiercircuit)Amplifythevoltage,usetheamplifiergainandbridgestructuredata,andusethedetectedvoltagetoinverselycalculatethecurrentresistancevalue,andusetherelationshipbetweenresistanceandtemperatureinthePT100datasheettocalculatethecurrenttemperature.IsAD590athermocoupleorathermalresistance?Itisneitherathermocouplenorathermalresistance.Themainprincipleistodetectthetemperatureaccordingtothetemperaturechange,theoutputcurrentchange,andthecurrentsize.

ThistextanalyzestheadvantagesofAD590,andusestheenergy-savingtemperatureandhumiditycontrolsystemasanexampletointroducetheapplicationofusingAD590tomeasuretwo-pointtemperaturedifferencecircuit.AD590isacurrentoutputtypetwo-endtemperaturesensormadebyADcompanyusingtherelationshipbetweenPNjunctionforwardcurrentandtemperature.Becausethedevicehasgoodlinearcharacteristicsandinterchangeability,ithashighmeasurementaccuracyandhasthecharacteristicsofeliminatingpowerfluctuations.CatalogI.AD590AdvantagesandFeaturesII.CelsiusTemperatureMeasurementCircuitIII.TemperatureDifferenceMeasurementCircuitandItsApplication3.1CircuitandPrincipleAnalysis3.2ApplicationExamples3.3.MeasurementoftheLowestTemperatureValueatPointN3.4.MeasurementofAverageTemperatureatPointNIV.ConclusionFAQOrderingQuantityI.AD590AdvantagesandFeaturesAD590typecurrentoutputintegratedtemperaturesensor,thedomesticsimilarproductmodelisSG590.Inpractice,thecorrespondingtemperaturevaluecanbeobtainedbymeasuringthecurrent.ThesuffixofAD590isrepresentedbyI,j,K,L,M,whichessentiallyreferstodifferentcharacteristicsanddifferentmeasurementtemperatureranges.Itsadvantagesandcharacteristicsareasfollows:(1)Linearoutputcurrent:1A/K(2)Widetemperaturerange:-55Cto+150C(3)Ceramicsensorpackagecompatiblewithprobe(4)Two-terminaldevice:voltageinput/currentoutput(5)Laseradjustedto0.5C,calibrationaccuracy(AD590M)(6)Excellentlinearity:fullscalerange0.3C(AD590M)(7)Widepowersupplyvoltagerange:4Vto30V(8)Thesensorisinsulatedfromthehousing(9)LowcostII.CelsiusTemperatureMeasurementCircuitAD590isacurrentoutputintegratedtemperaturesensor.Whendesigningatemperaturemeasurementcircuit,thecurrentmustbeconvertedintoavoltage.Forevery1Kincreaseintemperature,thecurrentincreasesbylA.ThedesignoftheCelsiustemperaturemeasurementcircuitmustcompletetwotasks:oneistoconvertthecurrentoutputbytheAD590intoavoltagesignal,thatis,thecurrentisconvertedintoavoltagecircuit.ThesecondistoconvertthethermodynamictemperatureintoCelsius,thatis,theabsolutetemperatureisconvertedtoCelsius.TheworkingprincipleoftheCelsiustemperaturemeasurementcircuitisshowninFigure1.AccordingtothecharacteristicsofAD590,foreverylKthermodynamictemperatureincreased,thecurrentincreasesbyluA,whentheloadresistanceis10K,thevoltagedroponthisresistanceis10mV.Amongthem,AD590,potentiometersRPlandR1,andoperationalamplifierA1formacurrent-to-voltageconversioncircuit.A1isconnectedintheformofavoltagefollower,mainlytoincreasetheinputresistanceofthesignal.TheoperationalamplifierA2isthecoredevicethatconvertsabsolutetemperaturetoCelsius.ItsconversionprincipleisthatzeroCelsiuscorrespondsto273Kthermodynamics.Therefore,thereferencevoltagemustbesettoconvertthermodynamicstoCelsiushumidity.Thevalueis2.73VcorrespondingtozeroCelsius.TherealizationmethodistoinputaconstantvoltagetotheendofthesamenameofA2.TheconstantvoltageisprovidedbythecurrentlimitingresistorR2andtheZenertube.TheconstantvoltageselectionZenertubemodelisCW385withavalueof1.235V.A2amplifiesthisvoltageto2.73v,RP2istoadjustthegainofA2operationalamplifier.Throughtheconversioncircuit,thevoltageattheoutputterminalsofA1andA2isthevoltagevalueproportionaltothetemperatureindegreesCelsius,thatis,thevoltagevaluecorrespondingto100mVperdegreeCelsius.Specialnote:Whendebugging,puttheintegratedtemperaturesensorAD590inthezero-degreeicewatersolution,firstadjusttheRPlpotentiometertomaketheA1operationalamplifieroutput2.73V,andthenadjusttheRP2potentiometertomaketheA2operationalamplifieroutput2.73V,Therefore,theoutputvoltageofthetemperaturemeasurementcircuitis0VatzerodegreesCelsius.ThechanginglawisthateverydegreeCelsiuscorrespondstoanoutputvoltageof10mV.Figure1.CelsiustemperaturemeasurementcircuitIII.TemperatureDifferenceMeasurementCircuitandItsApplication3.1CircuitandPrincipleAnalysisFigure2isacircuitthatusestwoAD590stomeasurethetemperaturedifferencebetweentwopoints.Inthecaseoffeedbackresistanceof100kW,setthetemperatureat1#and2#AD590ast1(℃)andt2(℃)respectively,thentheoutputvoltageis(t1-t2)100mV/℃.ThepotentiometerR2inthepictureisusedforzeroadjustment.PotentiometerR4isusedtoadjustthegainoftheopampLF355.Figure2.CircuitformeasuringtemperaturedifferencebetweentwopointsFromKirchhoffscurrentlaw:I+I2=I1+I3+I4(1)Knownfromthecharacteristicsoftheoperationalamplifier:I3=0(2)(3)adjustzeropotentiometerR2sothat:I4=0(4)From(1),(2),(4),wecanget:I=I1-I2Setup:R4=90kWthen:Vo=I(R3+R4)=(I1-I2)(R3+R4)=(t1-t2)100mV/℃(5)Amongthem,(t1-t2)isthetemperaturedifference,theunitisC.Knowingfromformula(5),changingthevalueof(R3+R4)canchangethesizeofVO.3.2ApplicationExamplesTakeacertainenergy-savingmedicinalmaterialwarehousetemperatureandhumiditycontrolsystemasanexample,ifthewarehousetemperatureisrequiredtobelowerthanT℃,therelativehumidityislowerthanA1B1%RH.Thetwocontrolmodesadoptedareasfollows:Controlmode1:WhentherelativehumidityinthewarehouseishigherthanA1B1%RHandthetemperatureoutsidethewarehouseislowerthanT℃,ventilationinsideandoutsidethewarehouseisperformed.Thismethodusesthedifferenceinhumidityinsideandoutsidethewarehousetoexchangeairtomeettherequirementsofdehumidificationinthewarehouse.Itsadvantagesarehighefficiency,energysaving,andmoneysaving.However,thismethodisstrictlycontrolled.Firstofall,therelativehumidityoutsidethewarehouseshouldbelowerthanthatinthewarehouse,andthedifferencebetweenthemmustbegreaterthanA2B2%RH,soastoeffectivelyensuretimelydehumidificationinsidethewarehouse.Secondly,thetemperaturedifferencebetweentheinsideandoutsideofthewarehouseshouldbelessthan△T℃.Thisisbecauseifventilationisperformedwhenthetemperatureoutsidethewarehouseismuchhigherthanthetemperatureinsidethewarehouse,thehotairenteringthewarehouseareawillencountercoldair,whichwillcausecondensationonthesurfaceofthemedicinesandequipment,thenaffectsthetheirquality.Conversely,ifventilationiscarriedoutwhenthetemperatureinsidethewarehouseismuchhigherthanthetemperatureoutsidethewarehouse,coldairwillalsocondenseonthesurfaceofthemedicineequipmentafterenteringthewarehouse.Inaddition,theoutsidetemperaturecannotbeclosetoTC.ThisisbecauseifventilationisperformedwhenthetemperatureoutsidethestorageisclosetoTC,thetemperatureoftheclosedstorageislikelytorise,therebyexceedingtheuppertemperaturelimitTC.Controlmode2:WhenthetemperatureishigherthanT℃orthehumidityishigherthanA1B1%RH,butthefirstconditionisnotmet,therefrigeratingandair-conditioningunitisturnedontocoolanddehumidifyinthewarehouse.Inordertoavoidthephenomenonofcondensationonthesurfaceofmedicinesandequipmentduetotheexcessivetemperaturedifferencebetweentheinsideandoutsideofthewarehouse,theaccuracyofthesystemtemperaturedifferencemustbestrictlycontrolled.Thetraditionalmethodofmeasuringthetemperaturedifferenceistoprocessthetemperatureofthetwopointsseparately(conditioningcircuit,A/D,arithmeticprocessing)andthenfindthedifference.Thismethodhaslowaccuracyofthetemperaturedifference.ThetemperaturedifferencemeasurementinsideandoutsidethelibrarycanusethecircuitshowninFigure2,usingthetemperaturedifferencevaluetodirectlycomparewiththesetvalue,whichcanensurehigheraccuracy,simplifythesoftwaredesignofthesystem,andimprovethereliabilityofthesystem.3.3.MeasurementoftheLowestTemperatureValueatPointNConnectseveralAD590satdifferenttemperaturemeasuringpointsinseries,andthelowesttemperaturevalueatallmeasuringpointscanbemeasured.Thismethodcanbeappliedtotheoccasionofmeasuringthelowesttemperatureatmultiplepoints.3.4.MeasurementofAverageTemperatureatPointNConnectNAD590sinparallel,andthenaveragethecurrentaftersumming,thentheaveragetemperaturecanbeobtained.Thismethodissuitablefortheoccasionswheretheaveragetemperatureofmultiplepointsisrequiredbutthespecifictemperatureofeachpointisnotrequired.IV.ConclusionAD590integratedtemperaturesensoriswidelyused.Itismainlyusedinengineeringtomeasurethermodynamictemperature,Celsiustemperature,temperaturedifferencebetweentwopoints,minimumtemperatureatmultiplepoints,averagetemperatureatmultiplepoints,etc.Therefore,itisnotonlywidelyusedindailylife,butalsowidelyusedinindustrialautomationcontrolsystemsandautomaticdetectionprocesscontrolsystems.Inaddition,duetoitshighaccuracy,lowprice,noauxiliarypowersupply,andgoodlinearity,AD590isoftenusedintemperaturemeasurementandtemperaturedetectionandcontrolfields.FAQWhatisAD590?AD590isatemperaturesensor,thecurrentoutputsensitivityis1A/℃,thestandardoutputvalueis298.2Aat25℃,andtheworkingvoltagerangeis4~30V.WhatarethecharacteristicsofAD590temperaturesensor?Singlefunction(onlytemperaturemeasurement),smalltemperaturemeasurementerror,lowprice,fastresponsespeed,longtransmissiondistance,smallsize,micropowerconsumption,etc.Itissuitableforremotetemperaturemeasurementandtemperaturecontrolwithoutnon-linearcalibration.Theperipheralcircuitissimple.HowtodetectthequalityofAD590?AD590hasacurrentof273mAat0.Because2113isaWensensitiveresistor5261,itmeansthatitisgreatlyaffectedbythesurroundingtemperature4102.Itisverydifficulttomeasurewithoutrelyingon1653othertools.Giveyousomesuggestions.Whentheambienttemperaturerisesbyonedegree,thecurrentofAD590increasesby1uA.WhatyouhavetodoistoworkwithAD590simultaneouslywiththehelpofahigh-precisiontemperaturetestinstrument.AfterAD590series10Kresistance,measureitsvoltage,thatistosay,itshouldbe2.73Vat0,and2.98Vatroomtemperature25.Forhigheraccuracy,itisrecommendedthatyouusetheelectronicbuildingblocksoftwareArdunioformeasurement,andputthecorrespondingdataintoMATLABforlinearregression.Thebetterthelinearity,themorestablethemeasurement.AD590isnotahigh-precisiontemperaturetestingdevice.Ifhigh-precisiontestingisrequired,othercomponentsarerecommended.WhatisthedifferencebetweenAD590andPT100?AD590isacurrent-typetemperaturesensor.Itconvertstemperaturechangesintocurrentconversion.Thesimplestprocessingistopassaresistor(10K)aftertheoutputtoconvertthecurrentintoavoltage,andthenthroughthedetectionvoltage,thecurrentatthistimecanbededuced.Usetherelationshipbetweencurrentandtemperatureinthesensordatatocalculatethecurrenttemperature.PT100isaresistancetypetemperaturesensor,whichconvertstemperaturechangesintoresistancechanges.ThesimplestprocessistoplacePt100inabridge,usethevoltagedifferenceatthemidpointofthebridgearm,anduseadifferentialamplifiercircuit(instrumentamplifiercircuit)Amplifythevoltage,usetheamplifiergainandbridgestructuredata,andusethedetectedvoltagetoinverselycalculatethecurrentresistancevalue,andusetherelationshipbetweenresistanceandtemperatureinthePT100datasheettocalculatethecurrenttemperature.IsAD590athermocoupleorathermalresistance?Itisneitherathermocouplenorathermalresistance.Themainprincipleistodetectthetemperatureaccordingtothetemperaturechange,theoutputcurrentchange,andthecurrentsize.2N3055isageneralpurposeNPNpowertransistormanufacturedwiththeepitaxialbaseprocess,mountedinahermeticallysealedmetalcase,whichdesignedforgeneral-purposeswitchingandamplifierapplications.2N3055ispreferredwhenyouwantasimpleswitchingdeviceformediumpowerloads.2N3055isoneofthebasictransistorsavailableinthemarketforcheapandwithfeaturesbeingsuitedformanyapplications.2N3055isalsousedinaudiopoweramplifiers.Thedevicehasgoodamplifyingfactorandalsothegainisalmostlinearmaking2N3055oneofbestsolutionforpoweramplifiers.Using2N3055makinganeasyinvertercircuitwhichcanoperateyourledlight,chargeyourmobile,fan,lcd,led,etc.Catalog2N3055PinConfigurationandFunctions2N3055Features2N3055Applications2N3055PackageHowtoUse2N3055Transistor2N3055CADModels2N3055FunctionalEquivalents2N3055PopularitybyRegion2N3055MarketPriceAnalysis2N3055ManufacturerComponentDatasheetOrderingQuantity2N3055PinConfigurationandFunctionsLikeanyothertransistor2N3055hasthreepinsnamelyEMITTER,BASEandCOLLECTOR.Thepinconfigurationof2N3055isgivenbelow.PinNumberPinNameDescription1Base(B)NormallyusedastriggertoturnONthetransistor2Emitter(E)NormallyconnectedtoGROUNDTABorCASECollector(C)NormallyconnectedtoLOAD2N3055FeaturesDCCurrentGainhFE=2070@IC=4AdcCollectorEmitterSaturationVoltageVCE(sat)=1.1Vdc(Max)@IC=4AdcExcellentSafeOperatingAreaPbFreePackagesareAvailable*2N3055ApplicationsPowerswitchingcircuitsAmplifiercircuitsPWMapplicationsRegulatorcircuitsSwitchmodepowersupplySignalAmplifiers2N3055PackageHowtoUse2N3055TransistorAsmentionedearlierthe2N3055canbeusedforanyNPNtransistorapplicationsbutforunderstandingthefunctioningofdeviceletusconsiderasimpleapplicationcircuitasshownbelow.Herewearegoingtouse2N3055asasimpleswitchingdevicetodriveamotorandisincommonemitterconfiguration.AsshowincircuitweareusingamotorastheloadandthegatesignalforturningONthetransistorisprovidedby5Vsourcewithbuttonbeingthetriggeringdevice.Thetriggersourceandpowersourcemustshareacommongroundforthecircuittowork.The100Ωresistorisprovidedforlimitingthecurrentthroughbase.Underinitialconditionsthebuttonwillbeopenandnocurrentflowsthroughthebaseoftransistor.WithnobasecurrentthetransistoractsasopencircuitandtheentiresupplyvoltageV1willappearsacrossit.Whenthebuttonispressedatcertaintime,thevoltageV2formsaclosedloopwithbase-emitteroftransistorascanbeseenincircuitdiagram.WiththisclosedloopacurrentflowsthroughbaseoftransistorandwithbasecurrentflowthetransistorgetsturnedON.HavingtransistoractingasshortcircuitinONstatetherewillbecollectorcurrentwhichflowsthroughmotormakingitrotate.Thismotorwillkeeprotatinguntiltherewillbebasecurrent.AfteracertaintimewhenthebuttonisreleasedthebasecurrentbecomeszeroandthetransistorgetsturnedOFF.WithtransistorgoingtohighresistancestateinOFFmode,thecollectorcurrentalsobecomeszerobringingmotortostop.Thewayofcontrollingpowermotorviasimplepushbuttonrealizestheuse2N3055asaswitchingdeviceandinthesamewaywecanuse2N3055inothertransistorcircuits.2N3055CADModelsPartsymbolFootprint2N3055FunctionalEquivalents2N3055PopularitybyRegion2N3055MarketPriceAnalysis2N3055ManufacturerONSemiconductorisdrivingenergyefficientinnovations,empoweringcustomerstoreduceglobalenergyuse.Thecompanyoffersacomprehensiveportfolioofenergyefficientpowerandsignalmanagement,logic,discreteandcustomsolutionstohelpdesignengineerssolvetheiruniquedesignchallengesinautomotive,communications,computing,consumer,industrial,LEDlighting,medical,military/aerospaceandpowersupplyapplications.ComponentDatasheet2N3055Datasheet

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