±1°C Remote and Local Temperature Sensor …

1 +5 VSCLGNDSDAV+SMBusController8576 tmp421 DXPDXNA1A012341 Channel Local1 Channel RemoteTMP422DX1DX2DX3DX412341 Channel Local2 Channels RemoteTMP423 DXP1 DXP2 DXP3 DXN12341 Channel Local3 Channels JULY2007 REVISEDMAY2012 1 C RemoteandLocalTEMPERATURESENSORC heckforSamples: tmp421 , TMP422, TMP4231 FEATURESDESCRIPTIONTheTMP421,TMP422,andT MP423areremote234 SOT23-8andDSBGA(WCSP)PACKAGES temperaturesensormonitorswithabuilt-inlo cal 1 C REMOTEDIODESENSOR(MAX) C LOCALTEMPERATURESENSOR(MAX)diode-connect edtransistorsaretypicallylow-cost,NPN-or PNP-typetransistorsordiodesthatarean SERIESRESISTANCECANCELLATION integralpartofmicrocontrollers,microproc essors,or n-FACTORCORRECTIONFPGAs. TWO-WIRE/SMBus SERIALINTERFACER emoteaccuracyis 1 CformultipleIC MULTIPLEINTERFACEADDRESSES manufacturers, DIODEFAULTDETECTION wireserialinterfaceacceptsSMBuswritebyte ,readbyte,sendbyte,andreceivebytecommand sto ,TMP422,andTMP423includeseriesresistance cancellation,programmablenon-ideality PROCESSOR/FPGATEMPERATURE factor,wideremotetemperaturemeasurementr angeMONITORING(upto+150 C),anddiodefaultdetection.

2 LCD/DLP /LCOSPROJECTORSTheTMP421,TMP422,andTMP42 3areallavailable CENTRALOFFICETELECOMEQUIPMENT availablein a DSBGA(WCSP)package. STORAGEAREANETWORKS(SAN)1 Pleasebeawarethatanimportantnoticeconcer ningavailability,standardwarranty,anduse in a a 2007 2012, JULY2007 (1)TWO-WIREPACKAGEPACKAGEPRODUCTDESCRIPT IONADDRESSPACKAGE-LEADDESIGNATORMARKINGT MP421 SingleChannel10011xxSOT23-8 DCNDACIR emoteJunctionTMP421C10011xxDSBGA-8 YZDTMP421 TemperatureSensorDualChannelTMP422 RemoteJunction10011xxSOT23-8 DCNDADIT emperatureSensorTMP423 ATripleChannel1001100 SOT23-8 DCNDAEIR emoteJunctionTMP423B1001101 SOT23-8 DCNDAFIT emperatureSensor(1)Forthemostcurrentpack ageandorderinginformationseethePackageOp tionAddendumattheendofthisdocument, (1)Overoperatingfree-airtemperaturerange , ,TMP422,TMP423 UNITP owerSupply,VS+7 VPins1,2,3,and4 only + and7 only 55to+127 CStorageTemperatureRange 60to+130 CJunctionTemperature(TJmax)+150 CHumanBodyModel(HBM)3000 VESDR atingChargedDeviceModel(CDM)1000 VMachineModel(MM)200V(1) ,andfunctionaloperationofthedeviceatthes eoranyotherconditionsbeyondthosespecifie dis 2007 2012,TexasInstrumentsIncorporatedProduct FolderLink(s) JULY2007 REVISEDMAY2012 ELECTRICALCHARACTERISTICS.

3 tmp421 ,TMP422,TMP423 AtTA= 40 C to+125 C andV+= , ,TMP422,TMP423 PARAMETERCONDITIONSMINTYPMAXUNITTEMPERAT UREERRORL ocalTemperatureSensorTELOCALTA= 40 C to+125 C CTA= +15 C to+85 C,V+= CRemoteTemperatureSensor(1)TEREMOTETA= +15 C to+85 C,TD= 40 C to+150 C,V+= 1 CTA= 40 C to+100 C,TD= 40 C to+150 C,V+= 1 3 CTA= 40 C to+125 C,TD= 40 C to+150 C 3 5 CvsSupply( Local / Remote )V+= C/VTEMPERATUREMEASUREMENTC onversionTime(perchannel)100115130msReso lutionLocalTemperatureSensor(programmabl e)12 BitsRemoteTemperatureSensor12 BitsRemoteSensorSourceCurrentsHighSeries Resistance3k Max120 AMediumHigh60 AMediumLow12 ALow6 ARemoteTransistorIdealityFactor tmp421 /22 (SCL,SDA) (SCL,SDA) VIN 6V 1+1 ASMBusInputCapacitance(SCL,SDA) (V+)(V+)+ (V+)VLeakageInputCurrentIIN0V VIN V+1 APOWERSUPPLYS pecifiedVoltageRangeV+ AEightConversionsperSecond400525 ASerialBusInactive,ShutdownMode310 ASerialBusActive,fS= 400kHz,ShutdownMode90 ASerialBusActive,fS= ,ShutdownMode350 40+125 CStorageRange 60+130 CThermalResistance JASOT23100 C/W(1)Testedwithlessthan5 2007 2012,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLink(s): tmp421 TMP422 TMP423 tmp421 TMP422 TMP423 SBOS398C JULY2007.

4 tmp421 CAtTA= 40 C to+125 C andV+= , 40 C to+125 C CTA= +15 C to+85 C,V+= CRemoteTemperatureSensor(1)TEREMOTETA= +15 C to+85 C,TD= 40 C to+150 C,V+= 1 CTA= 40 C to+100 C,TD= 40 C to+150 C,V+= 1 3 CTA= 40 C to+125 C,TD= 40 C to+150 C 3 5 CvsSupply( Local / Remote )V+= C/VTEMPERATUREMEASUREMENTC onversionTime(perchannel)100115130msReso lutionLocalTemperatureSensor(programmabl e)12 BitsRemoteTemperatureSensor12 BitsRemoteSensorSourceCurrentsHighSeries Resistance3k Max120 AMediumHigh60 AMediumLow12 ALow6 ARemoteTransistorIdealityFactor (SCL,SDA) (SCL,SDA) VIN 6V 1+1 ASMBusInputCapacitance(SCL,SDA) (V+)(V+)+ (V+)VLeakageInputCurrentIIN0V VIN V+1 APOWERSUPPLYS pecifiedVoltageRangeV+ AEightConversionsperSecond400525 ASerialBusInactive,ShutdownMode310 ASerialBusActive,fS= 400kHz,ShutdownMode90 ASerialBusActive,fS= ,ShutdownMode350 40+125 CStorageRange 60+130 CThermalResistance JADSBGA128 C/W(1)Testedwithlessthan5 2007 2012,TexasInstrumentsIncorporatedProduct FolderLink(s): tmp421 TMP422 TMP42312348765V+SCLGNDDXPDXNA1A0 SDATMP421V+SCLSDADXPDXNA1A012873465 GNDTMP421C12348765V+ JULY2007 REVISEDMAY2012 tmp421 PINCONFIGURATIONDCNPACKAGEYZDPACKAGESOT2 3-8 DSBGA-8(TOPVIEW)(TOPVIEW) ,open-drain;requirespull-upresistortoV+.

5 7 SCLS erialclocklineforSMBus,open-drain;requir espull-upresistortoV+.8V+Positivesupplyv oltage( ; )TMP422 PINCONFIGURATIONDCNPACKAGESOT23-8(TOPVIE W) ; ; ; ; ,open-drain;requirespull-upresistortoV+. 7 SCLS erialclocklineforSMBus,open-drain;requir espull-upresistortoV+.8V+Positivesupplyv oltage( )Copyright 2007 2012,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLink(s): tmp421 TMP422 TMP42312348765V+SCLGNDDXP1 DXP2 DXP3 DXNSDATMP423 tmp421 TMP422 TMP423 SBOS398C JULY2007 (TOPVIEW) ,Channel1,Channel2, ,open-drain;requirespull-upresistortoV+. 7 SCLS erialclocklineforSMBus,open-drain;requir espull-upresistortoV+.8V+Positivesupplyv oltage( )6 SubmitDocumentationFeedbackCopyright 2007 2012,TexasInstrumentsIncorporatedProduct FolderLink(s): tmp421 TMP422 TMP4233210-1-2-3 Ambient Temperature , T ( C) A-50-251251007550250 Remote Temperature Error ( C) V+ = +25 CREMOTE 30 Typical Units Shownh= Temperature Error () CAmbient Temperature , T (A C)3210-1-2-3-50125-25025507510050 Units ShownV+ = Resistance (M )W051015202530 Remote Temperature Error ( C) R GND-R V+- Remote Temperature Error () CRW( ) + = + = JULY2007 REVISEDMAY2012 TYPICALCHARACTERISTICSAtTA= +25 C andV+= + , (Diode-ConnectedTransistor,2N3906 PNP) 2007 2012,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ProductFolderLink(s).

6 tmp421 TMP422 TMP4233210-1-2-3 Capacitance (nF) Temperature Error ( C) Remote Temperature Error () CR (W) + = + = (MHz)051015 Temperature Error ( C) Local 100mVNoisePPRemote 100mVNoisePPLocal 250mVNoisePPRemote 250mVNoisePP5004504003503002502001501005 00 Conversion Rate (conversions/sec) (mA)QV+ = + = CLock Frequency (Hz)1k10k100k1M10MI ( A)mQV+ = + = ()QmAV+ (V) JULY2007 (continued)AtTA= +25 C andV+= + , (GNDC ollector-ConnectedTransistor,2N3906 PNP) 2007 2012,TexasInstrumentsIncorporatedProduct FolderLink(s) Fm10kW(typ)10kW(typ) tmp421 DXPDXNV+876521RS(2)RS(2)CDIFF(3)CDIFF(3) RS(2)RS(2)GNDSCLSDA+5 VSMBusControllerDiode-connected configuration :(1)Series ResistanceTransistor-connected configuration :(1) JULY2007 REVISEDMAY2012 APPLICATIONINFORMATIONTheTMP421isatwo-ch anneldigitaltemperatureForproperremotete mperaturesensingoperation, theremotechannelistemperature-measuremen tchannel,andisavailablenotutilized, (three-channel),andTMP423(four-channel) transistorconnectedtoeachremotejunctiont emperaturemeasurementchannels,positivech annel(DXP1,DXP2,andDXP3),withtherespecti vely, , , 40 Cto+125 ,Figure12, andFigure13showtypicalconfigurationsfort heTMP421,TMP422,andTMP423,respectively.

7 (1) (2)RS(optional)shouldbe< in ;seetheFilteringsection.(3)CDIFF(optiona l)shouldbe< ;seetheFilteringsectionandFigure6, 2007 2012,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback9 ProductFolderLink(s): tmp421 TMP422 TMP423 TMP422DX1(4)DX2(4)521RS(2)RS(2)CDIFF(3)C DIFF(3)RS(2)RS(2)GNDD iode-connected configuration :(1)Series ResistanceTransistor-connected configuration :(1)DX3(4)DX4(4)43RS(2)RS(2)CDIFF(3) Fm10kW(typ)10kW(typ)V+876 SCLSDA+5 VSMBusControllerDXP1 DXN1 DXP2 DXN2+5 VTMP423 DXP1 DXP2 DXP3 DXPDXNDXNSCLGNDSDAV+2347168RS(2)RS(2)RS( 2)RS(2)RS(2)RS(2)CDIFF(3)CDIFF(3)CDIFF(3 )Transistor-connected configuration :(1)CDIFF(3)RS(2)RS(2)Diode-connected configuration :(1) Fm10kW(typ)10kW(typ)SMBusControllerSerie s ResistanceTMP421 TMP422 TMP423 SBOS398C JULY2007 (1) (2)RS(optional)shouldbe< in.

8 SeetheFilteringsection.(3)CDIFF(optional )shouldbe< ;seetheFilteringsectionandFigure6, Remote TemperatureErrorvsDifferentialCapacitanc e.(4) (1) (2)RS(optional)shouldbe< in ;seetheFilteringsection.(3)CDIFF(optiona l)shouldbe< ;seetheFilteringsectionandFigure6, 2007 2012,TexasInstrumentsIncorporatedProduct FolderLink(s) JULY2007 REVISEDMAY2012 SERIESRESISTANCECANCELLATION changingbit2 (RANGE) anapplicationcircuitthattypicallyanddata formatfromstandardbinarytoextendedresult sfromprintedcircuitboard(PCB) ,preventingwhatconfiguration,anoffsetof6 4(40h)isaddedtothewouldotherwiseresultin a totalstandardbinaryvalue,asshownintheExt endedofupto3k ofserieslineresistanceis cancelledbyBinarycolumnofTable1. ThisconfigurationallowstheTMP421/22/23,e liminatingtheneedforadditionalmeasuremen toftemperaturesaslowas 64 C, +191 C;however,mosttemperature-SeethetwoRemot eTemperatureErrorvsSeriessensingdiodeson lymeasurewiththerangeof 55 CResistancetypicalcharacteristiccurves(F igure4 andto+150 ,theTMP421/22/23areratedFigure5) fordetailsontheeffectsofseriesresistance onlyforambienttemperaturesrangingfrom 40 C toandpower-supplyvoltageonsensedremote+1 25 (LocalandRemoteTemperatureHighBytes)TheT MP421/22/23toleratedifferentialinputcapa citanceofupto1000pFwithminimalchangeinLO CAL/REMOTETEMPERATUREREGISTERHIGHBYTEVAL UE(1 C RESOLUTION) (1)EXTENDEDBINARY(2)TEMPF igure6,RemoteTemperatureErrorvsDifferent ial( C)BINARYHEXBINARYHEXC apacitance.

9 6411000000C00000000000 5011001110CE000011100 ETEMPERATUREMEASUREMENTDATA 2511100111E70010011127000000000000100000 040 Temperaturemeasurementdatamaybetakenover anoperatingrangeof 40 C to+127 C ,measurementsfrom 55 Cto+150 Ccan2500011001190101100159bemadebothloca llyandremotelybyreconfiguring50001100103 20111001072theTMP421/22/23fortheextended temperaturerange, ,asshowninTable1, ratedtoonlymeasuretemperaturesdownto 55 C,it ,any191011111117F11111111 FFtemperaturebelow 64 Cresultsina datavalueof(1)Resolutionis 1 64(C0h).Likewise,temperaturesabove+127 Ctwo's valueof127(7Fh).Thedevicecanbeset(2)Reso lutionis 1 64 2007 2012,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback11 ProductFolderLink(s): tmp421 TMP422 TMP423 One-Shot Start RegisterConfiguration RegistersStatus RegisterIdentification RegistersN-Factor Correction RegistersConversion Rate RegisterLocal and Remote Temperature RegistersSDASCLP ointer RegisterI/OControlInterfaceSoftware ResetTMP421 TMP422 TMP423 SBOS398C JULY2007 (forexample,+20 C):bytestoresthedecimalfractionvalueofth e(+20 C)/(+1 C/count)= 20 14h 00010100temperatureandallowsahighermeasu rementConvertthenumbertobinarycodewith8- bit,resolution,asshowninTable2.

10 Themeasurementright-justifiedformat,andM SB= '0' C,andis notadjustable.+20 C is storedas00010100 (forexample, 20 C):Format(LocalandRemoteTemperatureLow(| 20|)/(+1 C/count)= 20 14h 00010100 Bytes)Generatethetwo'scomplementofanegat iveTEMPERATUREREGISTERLOWBYTEVALUE( C RESOLUTION)(1)numberbycomplementingtheab solutevalueTEMP binarynumberandadding1.( C)STANDARDANDEXTENDEDBINARYHEX0000000000 0 20 C is storedas11101100 , , (1)Resolutionis describesthepointeraddressoftheTMP421/22 (POR)valueofthePointerRegisteris00h(0000 CalculationExample0000b).Highbyteconvers ion(forexample,01110011) ,multiplythefirstnumberby160= 1 andthesecondnumberby161= 73h (3 160) + (7 161) = 115 Lowbyteconversion(forexample,01110000):T oconverttheleft-justifiedbinarylow-bytet odecimal,usebits7 through4 andignorebits3through0 (0 1/2)1+ (1 1/2)2+ (1 1/2)3+ (1 1/2)4= ,theunsignedlowbyteaddstothenegativehigh bytetoresultina valuelessthanthehighbyte(forinstance, 15+ ,not ).