LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 LM95221 Dual Remote Diode Digital Temperature Sensor with SMBus Interface CheckforSamples:LM95221 FEATURES APPLICATIONS 1 • AccuratelySensesDieTemperatureofRemote • Processor/ComputerSystemThermal 2 ICsorDiodeJunctions Management(e.g.Laptop,Desktop, • RemoteDiodeFaultDetection Workstations,Server) • On-boardLocalTemperatureSensing • ElectronicTestEquipment • RemoteTemperatureReadings • OfficeElectronics – 0.125°CLSb DESCRIPTION – 10-bitsPlusSignor11-bitsProgrammable The LM95221 is a dual remote diode temperature Resolution sensor in an 8-lead VSSOP package. The 2-wire – 11-bitsResolvesTemperaturesAbove serial interface of the LM95221 is compatible with 127°C SMBus 2.0. The LM95221 can sense three • LocalTemperatureReadings temperature zones, it can measure the temperature of its own die as well as two diode connected – 0.25°C transistors. The diode connected transistors can be a – 9-bitsPlusSign thermal diode as found in Pentium and AMD • StatusRegisterSupport processors or can simply be a diode connected MMBT3904 transistor. The LM95221 resolution • ProgrammableConversionRateAllowsUser format for remote temperature readings can be OptimizationofPowerConsumption programmed to be 10-bits plus sign or 11-bits • ShutdownModeOne-shotConversionControl unsigned. In the unsigned mode the LM95221 remote • SMBus2.0CompatibleInterface,Supports diode readings can resolve temperatures above TIMEOUT 127°C. Local temperature readings have a resolution of9-bitsplussign. • 8-pinVSSOPPackage The temperature of any ASIC can be accurately KEY SPECIFICATIONS determined using the LM95221 as long as a dedicated diode (semiconductor junction) is available • LocalTemperatureAccuracy on the target die. The LM95221 remote sensor – T =0°Cto85°C±3.0°C(max) accuracy of ±1°C is factory trimmed for a series A resistanceof2.7ohmsand1.008non-idealityfactor. • RemoteDiodeTemperatureAccuracy – T =30°Cto50°C,TD=45°Cto85°C A ±1.0°C(Max) – T =0°Cto85°C,TD=25°Cto140°C A ±3.0°C(Max) • SupplyVoltage3.0Vto3.6V • SupplyCurrent2mA(Typ) 1 Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet. Alltrademarksarethepropertyoftheirrespectiveowners. 2 PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©2004–2013,TexasInstrumentsIncorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarilyincludetestingofallparameters.

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com Simplified Block Diagram 3.0V-3.6V LM95221 Local Diode Selector ’-6(cid:3)Converter 11-Bit or 10-Bit Plus Sign Remote D+ Remote Temperature 9-bit Plus Sign Local D- Diode1 Selector Sensor Circuitry D+ Remote D- Diode2 Selector Control Logic TeRmeLpgoeiscrtaaeltrusre TeRRmeempgeiosrttaeetr u1sre TeRRmeempgeiosrttaeetr u2sre ConRfeigguisrtaetrion ReStgaistturse r MIRDae nRvueifsgaioicsnttue &rres r Two-Wire Serial SMBDAT Interface SMBCLK Connection Diagram D1+ 1 8 SMBCLK D1- 2 7 SMBDAT LM95221 D2+ 3 6 VDD D2- 4 5 GND Figure1. VSSOP-8 TOPVIEW PINDESCRIPTIONS Label Pin# Function TypicalConnection D1+ 1 DiodeCurrentSource ToDiodeAnode.Connectedtoremotediscretediode- connectedtransistorjunctionortothediode-connected transistorjunctiononaremoteICwhosedietemperatureis beingsensed.A2.2nFdiodebypasscapacitoris recommendedtofilterhighfrequencynoise.Placethe2.2nF capacitorbetweenandascloseaspossibletotheLM95221's D+andD−pins.Makesurethetracestothe2.2nFcapacitor arematched.Groundthispinifthisthermaldiodeisnotused. D1− 2 DiodeReturnCurrentSink ToDiodeCathode.A2.2nFcapacitorisrecommended betweenD1+andD1-.Groundthispinifthisthermaldiodeis notused. D2+ 3 DiodeCurrentSource ToDiodeAnode.Connectedtoremotediscretediode- connectedtransistorjunctionortothediode-connected transistorjunctiononaremoteICwhosedietemperatureis beingsensed.A2.2nFdiodebypasscapacitoris recommendedtofilterhighfrequencynoise.Placethe2.2nF capacitorbetweenandascloseaspossibletotheLM95221's D+andD−pins.Makesurethetracestothe2.2nFcapacitor arematched.Groundthispinifthisthermaldiodeisnotused. D2− 4 DiodeReturnCurrentSink ToDiodeCathode.A2.2nFcapacitorisrecommended betweenD2+andD2-.Groundthispinifthisthermaldiodeis notused. GND 5 PowerSupplyGround Ground V 6 PositiveSupplyVoltageInput DCVoltagefrom3.0Vto3.6V.V shouldbebypassedwith DD DD a0.1µFcapacitorinparallelwith100pF.The100pF capacitorshouldbeplacedascloseaspossibletothepower supplypin.Noiseshouldbekeptbelow200mVp-p,a10µF capacitormayberequiredtoachievethis. SMBDAT 7 SMBusBi-DirectionalDataLine, FromandtoController;mayrequireanexternalpull-upresistor Open-DrainOutput SMBCLK 8 SMBusClockInput FromController;mayrequireanexternalpull-upresistor 2 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 Typical Application +3.3V Standby C3* Pentium® 4 2.2 nF 1.R31k 1.R32k PROCESSOR 1 D1+ SMBCLK8 SMBCLK 2 7 D1- SMBDAT SMBDAT 3 6 2C.24 n*F 4 DD22+- GVNDDD5 C1* C2 LM95221 100 pF 0.1 PF SMBus Q1 Master MMBT3904 * Note, place close to LM95221 pins. Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. Absolute Maximum Ratings(1) SupplyVoltage −0.3Vto6.0V VoltageatSMBDAT,SMBCLK −0.5Vto6.0V VoltageatOtherPins −0.3Vto(V + DD 0.3V) D−InputCurrent ±1mA InputCurrentatAllOtherPins(2) ±5mA PackageInputCurrent(2) 30mA SMBDATOutputSinkCurrent 10mA StorageTemperature −65°Cto+150°C SolderingInformation,LeadTemperature VSSOP-8Package(3) VaporPhase(60seconds) 215°C Infrared(15seconds) 220°C ESDSusceptibility(4) HumanBodyModel 2000V MachineModel 200V (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.DCandACelectricalspecificationsdonot applywhenoperatingthedevicebeyonditsratedoperatingconditions. (2) Whentheinputvoltage(V)atanypinexceedsthepowersupplies(V <GNDorV >V ),thecurrentatthatpinshouldbelimitedto5 I I I DD mA.ParasiticcomponentsandorESDprotectioncircuitryareshowninFigure3belowfortheLM95221'spins.Thenominalbreakdown voltageofD4is6.5V.Careshouldbetakennottoforwardbiastheparasiticdiode,D1,presentonpins:D1+,D2+,D1−,D2−.Doingso bymorethan50mVmaycorruptthetemperaturemeasurements. (3) SeetheURL”http://www.ti.com/packaging/“forotherrecommendationsandmethodsofsolderingsurfacemountdevices. (4) Humanbodymodel,100pFdischargedthrougha1.5kΩresistor.Machinemodel,200pFdischargeddirectlyintoeachpin. Operating Ratings(1)(2) OperatingTemperatureRange 0°Cto+115°C ElectricalCharacteristicsTemperatureRange T ≤T ≤T MIN A MAX LM95221CIMM 0°C≤T ≤+85°C A SupplyVoltageRange(V ) +3.0Vto+3.6V DD (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.DCandACelectricalspecificationsdonot applywhenoperatingthedevicebeyonditsratedoperatingconditions. (2) Thermalresistancejunction-to-ambientwhenattachedtoaprintedcircuitboardwith2oz.foil: —VSSOP-8=210°C/W Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com Temperature-to-Digital Converter Characteristic Unlessotherwisenoted,thesespecificationsapplyforV =+3.0Vdcto3.6Vdc.BoldfacelimitsapplyforT =T = DD A J T ≤T ≤T ;allotherlimitsT =T=+25°C,unlessotherwisenoted.T isthejunctiontemperatureoftheLM95221.T isthe MIN A MAX A J J D junctiontemperatureoftheremotethermaldiode. Parameter Conditions Typical(1) Limits(2) Units (Limit) AccuracyUsingLocalDiode T =0°Cto+85°C(3) ±1 ±3 °C(max) A AccuracyUsingRemoteDiode,see(4)forThermal T =+30°Cto T =+45°Cto ±1 °C(max) A D DiodeProcessorType. +50°C +85°C T =+0°Cto+85°C T =+25°Cto ±3 °C(max) A D +140°C RemoteDiodeMeasurementResolution 11 Bits 0.125 °C LocalDiodeMeasurementResolution 10 Bits 0.25 °C ConversionTimeofAllTemperaturesattheFastest See(5) 66 73 ms(max) Setting QuiescentCurrent(6) SMBusInactive,15Hzconversion 2.0 2.6 mA(max) rate Shutdown 335 µA D−SourceVoltage 0.7 V DiodeSourceCurrent (D+−D−)=+0.65V;high-level 188 315 µA(max) 110 µA(min) Low-level 11.75 20 µA(max) 7 µA(min) Low-LevelDiodeSourceCurrentVariationover T =+30°Cto+50°C +0.5 µA A Temperature T =+30°Cto+85°C +1.5 µA A Power-OnResetThreshold MeasureonV input,fallingedge 2.4 V(max) DD 1.8 V(min) (1) TypicalsareatT =25°Candrepresentmostlikelyparametricnormal. A (2) LimitsarespecifiedtoTexasInstruments'AOQL(AverageOutgoingQualityLevel). (3) Localtemperatureaccuracydoesnotincludetheeffectsofself-heating.Theriseintemperatureduetoself-heatingistheproductofthe internalpowerdissipationoftheLM95221andthethermalresistance.SeeNote2oftheOperatingRatingstableforthethermal resistancetobeusedintheself-heatingcalculation. (4) TheaccuracyoftheLM95221CIMMisensuredwhenusingthethermaldiodewithanon-idealityof1.008andseriesR=2.7Ω.When usinganMMBT3904typetransistorasthethermaldiodetheerrorbandwillbeoffsetby-3.25°C (5) Thisspecificationisprovidedonlytoindicatehowoftentemperaturedataisupdated.TheLM95221canbereadatanytimewithout regardtoconversionstate(andwillyieldlastconversionresult). (6) QuiescentcurrentwillnotincreasesubstantiallywithanSMBus. 4 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 Logic Electrical Characteristics DIGITALDCCHARACTERISTICS Unlessotherwisenoted,thesespecificationsapplyforV =+3.0to3.6Vdc.BoldfacelimitsapplyforT =T =T to DD A J MIN T ;allotherlimitsT =T=+25°C,unlessotherwisenoted. MAX A J Symbol Parameter Conditions Typical(1) Limits(2) Units (Limit) SMBDAT,SMBCLKINPUTS V Logical“1”InputVoltage 2.1 V(min) IN(1) V Logical“0”InputVoltage 0.8 V(max) IN(0) V SMBDATandSMBCLKDigitalInput 400 mV IN(HYST) Hysteresis I Logical“1”InputCurrent V =V 0.005 ±10 µA(max) IN(1) IN DD I Logical“0”InputCurrent V =0V −0.005 ±10 µA(max) IN(0) IN C InputCapacitance 5 pF IN SMBDATOUTPUT I HighLevelOutputCurrent V =V 10 µA(max) OH OH DD V SMBusLowLevelOutputVoltage I =4mA 0.4 V(max) OL OL I =6mA 0.6 OL (1) TypicalsareatT =25°Candrepresentmostlikelyparametricnormal. A (2) LimitsarespecifiedtoTexasInstruments'AOQL(AverageOutgoingQualityLevel). SMBusDIGITALSWITCHINGCHARACTERISTICS Unlessotherwisenoted,thesespecificationsapplyforV =+3.0Vdcto+3.6Vdc,C (loadcapacitance)onoutputlines=80 DD L pF.BoldfacelimitsapplyforT =T =T toT ;allotherlimitsT =T =+25°C,unlessotherwisenoted. A J MIN MAX A J TheswitchingcharacteristicsoftheLM95221fullymeetorexceedthepublishedspecificationsoftheSMBusversion2.0.The followingparametersarethetimingrelationshipsbetweenSMBCLKandSMBDATsignalsrelatedtotheLM95221.They adheretobutarenotnecessarilytheSMBusbusspecifications. Symbol Parameter Conditions Typical(1) Limits(2) Units (Limit) f SMBusClockFrequency 100 kHz(max) SMB 10 kHz(min) t SMBusClockLowTime fromV maxtoV max 4.7 µs(min) LOW IN(0) IN(0) 25 ms(max) t SMBusClockHighTime fromV mintoV min 4.0 µs(min) HIGH IN(1) IN(1) t SMBusRiseTime See(3) 1 µs(max) R,SMB t SMBusFallTime See(4) 0.3 µs(max) F,SMB t OutputFallTime C =400pF, 250 ns(max) OF L I =3mA(4) O t SMBDATandSMBCLKTimeLowforResetof 25 ms(min) TIMEOUT SerialInterface(5) 35 ms(max) t DataInSetupTimetoSMBCLKHigh 250 ns(min) SU;DAT t DataOutStableafterSMBCLKLow 300 ns(min) HD;DAT 900 ns(max) t StartConditionSMBDATLowtoSMBCLKLow 100 ns(min) HD;STA (Startconditionholdbeforethefirstclockfalling edge) t StopConditionSMBCLKHightoSMBDATLow 100 ns(min) SU;STO (StopConditionSetup) t SMBusRepeatedStart-ConditionSetupTime, 0.6 µs(min) SU;STA SMBCLKHightoSMBDATLow (1) TypicalsareatT =25°Candrepresentmostlikelyparametricnormal. A (2) LimitsarespecifiedtoTexasInstruments'AOQL(AverageOutgoingQualityLevel). (3) Theoutputrisetimeismeasuredfrom(V max+0.15V)to(V min−0.15V). IN(0) IN(1) (4) Theoutputfalltimeismeasuredfrom(V min-0.15V)to(V min+0.15V). IN(1) IN(1) (5) HoldingtheSMBDATand/orSMBCLKlinesLowforatimeintervalgreaterthant willresettheLM95221'sSMBusstatemachine, TIMEOUT thereforesettingSMBDATandSMBCLKpinstoahighimpedancestate. Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com SMBusDIGITALSWITCHINGCHARACTERISTICS Unlessotherwisenoted,thesespecificationsapplyforV =+3.0Vdcto+3.6Vdc,C (loadcapacitance)onoutputlines=80 DD L pF.BoldfacelimitsapplyforT =T =T toT ;allotherlimitsT =T =+25°C,unlessotherwisenoted. A J MIN MAX A J TheswitchingcharacteristicsoftheLM95221fullymeetorexceedthepublishedspecificationsoftheSMBusversion2.0.The followingparametersarethetimingrelationshipsbetweenSMBCLKandSMBDATsignalsrelatedtotheLM95221.They adheretobutarenotnecessarilytheSMBusbusspecifications. Symbol Parameter Conditions Typical(1) Limits(2) Units (Limit) t SMBusFreeTimeBetweenStopandStart 1.3 µs(min) BUF Conditions tLOW tR tF VIH SMBCLK VIL tBUF tHD;STA tHD;DAT tHIGH tSU;DAT tSU;STA tSU;STO SMBDATVIH VIL P S P Figure2. SMBusCommunication Pin PIN# D1 D2 D3 D4 D5 D6 D7 R1 SNP ESD Name CLAMP V 1 x x DD D1+ 2 x(1) x x x x x x D1− 3 x x x x x x x x D2+ 4 x x x x x x x D2- 6 x x x x x x x x SMBDAT 7 x x x x x SMBCLK 8 x x x (1) Note:An“x”indicatesthatthecomponentexistsforthedesignatedpin.SNPreferstoasnap-backdevice. V+ D1 D3 D4 D6 I/O D2 ESD R1 SNP Clamp D5 D7 GND Figure3. ESDProtectionInputStructure 6 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 Typical Performance Characteristics ThermalDiodeCapacitororPCBLeakageCurrentEffect RemoteTemperatureReadingSensitivitytoThermal RemoteDiodeTemperatureReading DiodeFilterCapacitance Figure4. Figure5. ConversionRateEffectonAveragePowerSupplyCurrent Figure6. Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com FUNCTIONAL DESCRIPTION The LM95221 is a digital sensor that can sense the temperature of 3 thermal zones using a sigma-delta analog- to-digital converter. It can measure its local die temperature and the temperature of two diode connected MMBT3904 transistors using a ΔV temperature sensing method. The 2-wire serial interface, of the LM95221, is be compatible with SMBus 2.0 and I2C. Please see the SMBus 2.0 specification for a detailed description of the differencesbetweentheI2CbusandSMBus. The temperature conversion rate is programmable to allow the user to optimize the current consumption of the LM95221 to the system requirements. The LM95221 can be placed in shutdown to minimize power consumption when temperature data is not required. While in shutdown, a 1-shot conversion mode allows system control of theconversionrateforultimateflexibility. The remote diode temperature resolution is eleven bits and is programmable to 11-bits unsigned or 10-bits plus sign. The least-significant-bit (LSb) weight for both resolutions is 0.125°C. The unsigned resolution allows the remote diodes to sense temperatures above 127°C. Local temperature resolution is not programmable and is always9-bitsplussignandhasa0.25°CLSb. The LM95221 remote diode temperature accuracy will be trimmed for the thermal diode of a Prescott processor andtheaccuracywillbeensuredonlywhenusingthisdiode. Diode fault detection circuitry in the LM95221 can detect the presence of a remote diode: whether D+ is shorted toV ,D-orground,orwhetherD+isfloating. DD TheLM95221registersethasan8-bitdatastructureandincludes: 1. Most-Significant-Byte(MSB)LocalTemperatureRegister 2. Least-Significant-Byte(LSB)LocalTemperatureRegister 3. MSBRemoteTemperature1Register 4. LSBRemoteTemperature1Register 5. MSBRemoteTemperature2Register 6. LSBRemoteTemperature2Register 7. StatusRegister:busy,diodefault 8. ConfigurationRegister:resolutioncontrol,conversionratecontrol,standbycontrol 9. 1-shotRegister 10. ManufacturerID 11. RevisionID CONVERSION SEQUENCE The LM95221 takes approximately 66 ms to convert the Local Temperature, Remote Temperature 1 and 2, and to update all of its registers. Only during the conversion process the busy bit (D7) in the Status register (02h) is high. These conversions are addressed in a round robin sequence. The conversion rate may be modified by the Conversion Rate bits found in the Configuration Register (03h). When the conversion rate is modified a delay is inserted between conversions, the actual conversion time remains at 66ms (26 ms for each remote and 14 ms for local). Different conversion rates will cause the LM95221 to draw different amounts of supply current as showninFigure7. 8 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 Figure7. ConversionRateEffectonPowerSupplyCurrent POWER-ON-DEFAULT STATES LM95221 always powers up to these known default states. The LM95221 remains in these states until after the firstconversion. 1. CommandRegistersetto00h 2. LocalTemperaturesetto0°C 3. RemoteDiodeTemperaturesetto0°Cuntiltheendofthefirstconversion 4. StatusRegisterdependsonstateofthermaldiodeinputs 5. Configurationregistersetto00h;continuousconversion,time=66ms SMBus INTERFACE The LM95221 operates as a slave on the SMBus, so the SMBCLK line is an input and the SMBDAT line is bidirectional. The LM95221 never drives the SMBCLK line and it does not support clock stretching. According to SMBus specifications, the LM95221 has a 7-bit slave address. All bits A6 through A0 are internally programmed andcannotbechangedbysoftwareorhardware.TheLM95221hasthefollowingSMBusslaveaddress: Version A6 A5 A4 A3 A2 A1 A0 LM95221 0 1 0 1 0 1 1 TEMPERATURE DATA FORMAT TemperaturedatacanonlybereadfromtheLocalandRemoteTemperatureregisters. Remote temperature data is represented by an 11-bit, two's complement word or unsigned binary word with an LSb (Least Significant Bit) equal to 0.125°C. The data format is a left justified 16-bit word available in two 8-bit registers.Unusedbitswillalwaysreport"0". Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com Table1.11-bit,2'scomplement(10-bitplussign) Temperature DigitalOutput Binary Hex +125°C 0111110100000000 7D00h +25°C 0001100100000000 1900h +1°C 0000000100000000 0100h +0.125°C 0000000000100000 0020h 0°C 0000000000000000 0000h −0.125°C 1111111111100000 FFE0h −1°C 1111111100000000 FF00h −25°C 1110011100000000 E700h −55°C 1100100100000000 C900h Table2.11-bit,unsignedbinary Temperature DigitalOutput Binary Hex +255.875°C 1111111111100000 FFE0h +255°C 1111111100000000 FF00h +201°C 1100100100000000 C900h +125°C 0111110100000000 7D00h +25°C 0001100100000000 1900h +1°C 0000000100000000 0100h +0.125°C 0000000000100000 0020h 0°C 0000000000000000 0000h Local Temperature data is represented by a 10-bit, two's complement word with an LSb (Least Significant Bit) equal to 0.25°C. The data format is a left justified 16-bit word available in two 8-bit registers. Unused bits will always report "0". Local temperature readings greater than +127.875°C are not clamped to +127.875°C, they will roll-overtonegativetemperaturereadings. Temperature DigitalOutput Binary Hex +125°C 0111110100000000 7D00h +25°C 0001100100000000 1900h +1°C 0000000100000000 0100h +0.125°C 0000000000100000 0020h 0°C 0000000000000000 0000h −0.25°C 1111111111000000 FFE0h −1°C 1111111100000000 FF00h −25°C 1110011100000000 E700h −55°C 1100100100000000 C900h 10 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 SMBDAT OPEN-DRAIN OUTPUT The SMBDAT output is an open-drain output and does not have internal pull-ups. A “high” level will not be observed on this pin until pull-up current is provided by some external source, typically a pull-up resistor. Choice of resistor value depends on many system factors but, in general, the pull-up resistor should be as large as possible without effecting the SMBus desired data rate. This will minimize any internal temperature reading errors due to internal heating of the LM95221. The maximum resistance of the pull-up to provide a 2.1V high level, based on LM95221 specification for High Level Output Current with the supply voltage at 3.0V, is 82kΩ(5%)or88.7kΩ(1%). DIODE FAULT DETECTION The LM95221 is equipped with operational circuitry designed to detect fault conditions concerning the remote diodes. In the event that the D+ pin is detected as shorted to GND, D−, V or D+ is floating, the Remote DD Temperature reading is –128.000 °C if signed format is selected and +255.875 if unsigned format is selected. In addition,theappropriatestatusregisterbitsRD1MorRD2M(D1orD0)areset. COMMUNICATING with the LM95221 The data registers in the LM95221 are selected by the Command Register. At power-up the Command Register is set to “00”, the location for the Read Local Temperature Register. The Command Register latches the last locationitwassetto.EachdataregisterintheLM95221fallsintooneoffourtypesofuseraccessibility: 1. Readonly 2. Writeonly 3. Write/Readsameaddress 4. Write/Readdifferentaddress A Write to the LM95221 will always include the address byte and the command byte. A write to any register requiresonedatabyte. ReadingtheLM95221cantakeplaceeitheroftwoways: 1. If the location latched in the Command Register is correct (most of the time it is expected that the Command Register will point to one of the Read Temperature Registers because that will be the data most frequently read from the LM95221), then the read can simply consist of an address byte, followed by retrieving the data byte. 2. If the Command Register needs to be set, then an address byte, command byte, repeat start, and another addressbytewillaccomplisharead. Thedatabytehasthemostsignificantbitfirst.Attheendofaread,theLM95221canaccepteitheracknowledge or No Acknowledge from the Master (No Acknowledge is typically used as a signal for the slave that the Master hasreaditslastbyte).IttakestheLM9522166mstomeasurethetemperatureoftheremotediodesandinternal diode. When retrieving all 11 bits from a previous remote diode temperature measurement, the master must insure that all 11 bits are from the same temperature conversion. This may be achieved by reading the MSB register first. The LSB will be locked after the MSB is read. The LSB will be unlocked after being read. If the user reads MSBs consecutively, each time the MSB is read, the LSB associated with that temperature will be locked inandoverridethepreviousLSBvaluelocked-in. Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com SMBus Timing Diagrams 1 9 1 9 SMBCLK SMBDAT A6 A5 A4 A3 A2 A1 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Start by Ack Ack Master by by LM95221 LM95221 Frame 1 Frame 2 Serial Bus Address Byte Command Byte 1 9 SMBCLK (Continued) SMBDAT D7 D6 D5 D4 D3 D2 D1 D0 (Continued) Ack by Stop LM95221 by Master Frame 3 Data Byte Figure8. SerialBusWritetotheinternalCommandRegisterfollowedbyatheDataByte 1 9 1 9 SMBCLK SMBDAT A6 A5 A4 A3 A2 A1 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Start by Ack Ack by Stop Master by LM95221 by LM95221 Master Frame 1 Frame 2 Serial Bus Address Byte Command Byte Figure9. SerialBusWritetotheInternalCommandRegister 1 9 1 9 SMBCLK SMBDAT A6 A5 A4 A3 A2 A1 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Start by Ack NoAck Stop Master by by by LM95221 MasterMaster Frame 1 Frame 2 Serial Bus Address Byte Data Byte from the LM95221 Figure10. SerialBusReadfromaRegisterwiththeInternalCommandRegisterpresettodesiredvalue. 1 9 1 9 SMBCLK SMBDAT A6 A5 A4 A3 A2 A1 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Start by Ack Ack Repeat Master by by Start by LM95221 LM95221 Master Frame 1 Frame 2 Serial Bus Address Byte Command Byte 1 9 1 9 SMBCLK (Continued) SMBDAT (Continued) A6 A5 A4 A3 A2 A1 A0 R/W D7 D6 D5 D4 D3 D2 D1 D0 Ack No Ack Stop by by by LM95221 MasterMaster Frame 3 Frame 4 Serial Bus Address Byte Data Byte from the LM95221 Figure11. SerialBusWritefollowedbyaRepeatStartandImmediateRead 12 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 SERIAL INTERFACE RESET In the event that the SMBus Master is RESET while the LM95221 is transmitting on the SMBDAT line, the LM95221 must be returned to a known state in the communication protocol. This may be done in one of two ways: 1. When SMBDAT is LOW, the LM95221 SMBus state machine resets to the SMBus idle state if either SMBDAT or SMBCLK are held low for more than 35ms (t ). Note that according to SMBus TIMEOUT specification 2.0 all devices are to timeout when either the SMBCLK or SMBDAT lines are held low for 25- 35ms. Therefore, to insure a timeout of all devices on the bus the SMBCLK or SMBDAT lines must be held lowforatleast35ms. 2. When SMBDAT is HIGH, have the master initiate an SMBus start. The LM95221 will respond properly to an SMBus start condition at any point during the communication. After the start the LM95221 will expect an SMBusAddressaddressbyte. ONE-SHOT CONVERSION The One-Shot register is used to initiate a single conversion and comparison cycle when the device is in standby mode, after which the device returns to standby. This is not a data register and it is the write operation that causes the one-shot conversion. The data written to this address is irrelevant and is not stored. A zero will alwaysbereadfromthisregister. LM95221 Registers Command register selects which registers will be read from or written to. Data for this register should be transmittedduringtheCommandByteoftheSMBuswritecommunication. P7 P6 P5 P4 P3 P2 P1 P0 Command P0-P7:Command Table3.RegisterSummary Name Command Power-On Read/Write #ofusedbits Comments (Hex) DefaultValue (Hex) StatusRegister 02h - RO 3 2statusbitsand1busybit ConfigurationRegister 03h 00h R/W 4 Includesconversionratecontrol 1-shot 0Fh - WO - Activatesoneconversionforall 3channelsifthechipisin standbymode(i.e.RUN/STOP bit=1).Datatransmittedbythe hostisignoredbytheLM95221. LocalTemperatureMSB 10h - RO 8 RemoteTemperature1MSB 11h - RO 8 RemoteTemperature2MSB 12h - RO 8 LocalTemperatureLSB 20h - RO 2 Allunusedbitswillreportzero RemoteTemperature1LSB 21h - RO 3 Allunusedbitswillreportzero RemoteTemperature2LSB 22h - RO 3 Allunusedbitswillreportzero ManufacturerID FEh 01h RO RevisionID FFh 61h RO Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com STATUSREGISTER(ReadOnlyAddress02h) D7 D6 D5 D4 D3 D2 D1 D0 Busy Reserved RD2M RD1M 0 0 0 0 0 Bits Name Description 7 Busy Whensetto"1"thepartisconverting. 6-2 Reserved Reports"0"whenread. 1 Remotediode2missing(RD2M) RemoteDiode2ismissing.(i.e.D2+shortedtoV ,GroundorD2-,orD2+is DD floating).TemperatureReadingisFFE0hwhichconvertsto255.875°Cif unsignedformatisselectedor8000hwhichconvertsto–128.000°Cifsigned formatisselected. 0 Remotediode1missing(RD1M) RemoteDiode1ismissing.(i.e.D1+shortedtoV ,GroundorD1-,orD1+is DD floating).TemperatureReadingisFFE0hwhichconvertsto255.875°Cif unsignedformatisselectedor8000hwhichconvertsto–128.000°Cifsigned formatisselected. CONFIGURATIONREGISTER(ReadAddress03h/WriteAddress03h) D7 D6 D5 D4 D3 D2 D1 D0 0 RUN/STOP CR1 CR0 0 R2DF R1DF 0 Bits Name Description 7 Reserved Reports"0"whenread. 6 RUN/STOP Logic1disablestheconversionandputsthepartinstandbymode. Conversioncanbeactivatedbywritingtoone-shotregister. 5-4 ConversionRate(CR1:CR0) 00:continuousmode66ms,15Hz(typ) 01:convertsevery200ms,5Hz(typ) 10:convertsevery1second,1Hz(typ) 11:convertsevery3seconds,⅓Hz(typ) Note:typicallyaremotediodeconversiontakes26msandlocalconversion takes14ms. 3 Reserved Reports"0"whenread. 2 Remote2DataFormat(R2DF) Logic0:unsignedTemperatureformat(0°Cto+255.875°C) Logic1:signedTemperatureformat(-128°Cto+127.875°C) 1 Remote1DataFormat(R1DF) Logic0:unsignedTemperatureformat(0°Cto+255.875°C) Logic1:signedTemperatureformat(-128°Cto+127.875°C) 0 Reserved Reports"0"whenread. Powerupdefaultiswithallbits“0”(zero) LOCALandREMOTEMSBandLSBTEMPERATUREREGISTERS Table4.LocalTemperatureMSB(ReadOnlyAddress10h)9-bitplussignformat(1): BIT D7 D6 D5 D4 D3 D2 D1 D0 Value SIGN 64 32 16 8 4 2 1 (1) TemperatureData:LSb=1°C. Table5.LocalTemperatureLSB(ReadOnlyAddress20h)9-bitplussignformat(1): BIT D7 D6 D5 D4 D3 D2 D1 D0 Value 0.5 0.25 0 0 0 0 0 0 (1) TemperatureData:LSb=0.25°C 14 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 Table6.RemoteTemperatureMSB(ReadOnlyAddress11h,12h)10bitplussignformat(1): BIT D7 D6 D5 D4 D3 D2 D1 D0 Value SIGN 64 32 16 8 4 2 1 (1) TemperatureData:LSb=1°C. Table7.RemoteTemperatureMSB(ReadOnlyAddress11h,12h)11-bitunsignedformat(1): BIT D7 D6 D5 D4 D3 D2 D1 D0 Value 128 64 32 16 8 4 2 1 (1) Table8.RemoteTemperatureLSB(ReadOnlyAddress21,22h)10-bitplussignor11-bitunsignedbinary formats(1): BIT D7 D6 D5 D4 D3 D2 D1 D0 Value 0.5 0.25 0.125 0 0 0 0 0 (1) TemperatureData:LSb=0.125°C. For data synchronization purposes, the MSB register should be read first if the user wants to read both MSB and LSB registers. The LSB will be locked after the MSB is read. The LSB will be unlocked after being read. If the user reads MSBs consecutively, each time the MSB is read, the LSB associated with that temperature will be lockedinandoverridethepreviousLSBvaluelocked-in. MANUFACTURERSIDREGISTER (ReadAddressFEh)Thedefaultvalueis01h. DIEREVISIONCODEREGISTER (Read Address FFh) Value to be determined. This register will increment by 1 every time there is a revision to thediebyTexasInstruments. Applications Hints The LM95221 can be applied easily in the same way as other integrated-circuit temperature sensors, and its remote diode sensing capability allows it to be used in new ways as well. It can be soldered to a printed circuit board, and because the path of best thermal conductivity is between the die and the pins, its temperature will effectively be that of the printed circuit board lands and traces soldered to the LM95221's pins. This presumes that the ambient air temperature is almost the same as the surface temperature of the printed circuit board; if the airtemperatureismuchhigherorlowerthanthesurfacetemperature,theactualtemperatureoftheLM95221die will be at an intermediate temperature between the surface and air temperatures. Again, the primary thermal conductionpathisthroughtheleads,sothecircuitboardtemperature will contribute to the die temperature much morestronglythanwilltheairtemperature. To measure temperature external to the LM95221's die, use a remote diode. This diode can be located on the die of a target IC, allowing measurement of the IC's temperature, independent of the LM95221's temperature. The LM95221 has been optimized to measure the remote thermal diode with a non-ideality of 1.008 and a series resistance of 2.7Ω. The thermal diode on the Pentium 4 processor on the 90 nm process has a typical non- ideality of 1.011 and a typical series resistance of 3.33Ω. Therefore, when measuring this thermal diode with the LM95221 a typical offset of +1.5°C will be observed. This offset can be compensated for easily by subracting 1.5°C from the LM95221's readings. A discrete diode can also be used to sense the temperature of external objects or ambient air. Remember that a discrete diode's temperature will be affected, and often dominated, by thetemperatureofitsleads. Most silicon diodes do not lend themselves well to this application. It is recommended that a 2N3904 transistor baseemitterjunctionbeusedwiththecollectortiedtothebase. When measuring a diode-connected 2N3904, with an LM95221, an offset of -3.25°C will be observed. This offset cansimplybeaddedtotheLM95221'sreading: T =T +3.25°C (1) 2N3904 LM95221 Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com DIODENON-IDEALITY DiodeNon-IdealityFactorEffectonAccuracy Whenatransistorisconnectedasadiode,thefollowingrelationshipholdsforvariablesV ,TandI: BE f Vbe I = I e K V t - 1 F S where k T V = • t q • q=1.6×10−19Coulombs(theelectroncharge), • T=AbsoluteTemperatureinKelvin • k=1.38×10−23joules/K(Boltzmann'sconstant), • ηisthenon-idealityfactoroftheprocessthediodeismanufacturedon, • I =SaturationCurrentandisprocessdependent, S • I=ForwardCurrentthroughthebaseemitterjunction f • V =BaseEmitterVoltagedrop (2) BE Intheactiveregion,the-1termisnegligibleandmaybeeliminated,yieldingthefollowingequation: Vbe IF = IS eK V t (3) Intheaboveequation, ηandI aredependantupontheprocessthatwasusedinthefabricationoftheparticular S diode. By forcing two currents with a very controlled ratio (N) and measuring the resulting voltage difference, it is possibletoeliminatetheI term.Solvingfortheforwardvoltagedifferenceyieldstherelationship: S k T V = K ln (N) be q (4) The voltage seen by the LM95221 also includes the I R voltage drop of the series resistance. The non-ideality F S factor, η, is the only other parameter not accounted for and depends on the diode that is used for measurement. Since ΔV is proportional to both η and T, the variations in η cannot be distinguished from variations in BE temperature. Since the non-ideality factor is not controlled by the temperature sensor, it will directly add to the inaccuracy of the sensor. For the Pentium 4 and Mobile Pentium Processor-M Intel specifies a ±0.1% variation in η from part to part. As an example, assume a temperature sensor has an accuracy specification of ±1°C at room temperature of 25 °C and the process used to manufacture the diode has a non-ideality variation of ±0.1%. The resultingaccuracyofthetemperaturesensoratroomtemperaturewillbe: T =±1°C+(±0.1%of298°K)=±1.4°C (5) ACC 16 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 The additional inaccuracy in the temperature measurement caused by η, can be eliminated if each temperature sensoriscalibratedwiththeremotediodethatitwillbepairedwith. ProcessorFamily η,non-ideality SeriesR min typ max PentiumII 1 1.0065 1.0173 PentiumIIICPUID67h 1 1.0065 1.0125 PentiumIIICPUID 1.0057 1.008 1.0125 68h/PGA370Socket/Celeron Pentium4,423pin 0.9933 1.0045 1.0368 Pentium4,478pin 0.9933 1.0045 1.0368 Pentium4on0.13micronprocess, 1.0011 1.0021 1.0030 3.64Ω 2-3.06GHz Pentium4on90nmprocess 1.011 3.33Ω PentiumMProcessor(Centrino) 1.00151 1.00220 1.00289 3.06Ω MMBT3904 1.003 AMDAthlonMPmodel6 1.002 1.008 1.016 CompensatingforDiodeNon-Ideality In order to compensate for the errors introduced by non-ideality, the temperature sensor is calibrated for a particular processor. Texas Instruments temperature sensors are always calibrated to the typical non-ideality of a given processor type. The LM95221 is calibrated for a non-ideality of 1.008 and a series resistance of 2.7Ω. When a temperature sensor calibrated for a particular processor type is used with a different processor type or a givenprocessortypehasanon-idealitythatstraysfromthetypical,errorsareintroduced. Temperature errors associated with non-ideality may be reduced in a specific temperature range of concern throughuseofanoffsetcalibrationaccomplishedthroughsoftware. Please send an email to hardware.monitor.team@nsc.com requesting further information on our recommended offsetvaluefordifferentprocessortypes. Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLinks:LM95221

LM95221 SNIS134B–MAY2004–REVISEDMARCH2013 www.ti.com PCBLAYOUTFORMINIMIZINGNOISE Figure12. IdealDiodeTraceLayout In a noisy environment, such as a processor mother board, layout considerations are very critical. Noise induced on traces running between the remote temperature diode sensor and the LM95221 can cause temperature conversion errors. Keep in mind that the signal level the LM95221 is trying to measure is in microvolts. The followingguidelinesshouldbefollowed: 1. V shouldbebypassedwitha0.1µFcapacitorinparallelwith100pF.The100pFcapacitorshouldbeplaced DD as close as possible to the power supply pin. A bulk capacitance of approximately 10µF needs to be in the nearvicinityoftheLM95221. 2. A 2.2nF diode bypass capacitor is required to filter high frequency noise. Place the 2.2nF capacitor as close aspossibletotheLM95221'sD+andD−pins.Makesurethetracestothe2.2nFcapacitorarematched. 3. Ideally, the LM95221 should be placed within 10cm of the Processor diode pins with the traces being as straight, short and identical as possible. Trace resistance of 1Ω can cause as much as 1°C of error. This errorcanbecompensatedbyusingsimplesoftwareoffsetcompensation. 4. Diode traces should be surrounded by a GND guard ring to either side, above and below if possible. This GND guard should not be between the D+ and D− lines. In the event that noise does couple to the diode linesitwouldbeidealifitiscoupledcommonmode.ThatisequallytotheD+andD−lines. 5. Avoidroutingdiodetracesincloseproximitytopowersupplyswitchingorfilteringinductors. 6. Avoid running diode traces close to or parallel to high speed digital and bus lines. Diode traces should be keptatleast2cmapartfromthehighspeeddigitaltraces. 7. If it is necessary to cross high speed digital traces, the diode traces and the high speed digital traces should crossata90degreeangle. 8. The ideal place to connect the LM95221's GND pin is as close as possible to the Processors GND associatedwiththesensediode. 9. Leakage current between D+ and GND and between D+ and D− should be kept to a minimum. Thirteen nano-amperes of leakage can cause as much as 0.2°C of error in the diode temperature reading. Keeping theprintedcircuitboardascleanaspossiblewillminimizeleakagecurrent. Noise coupling into the digital lines greater than 400mVp-p (typical hysteresis) and undershoot less than 500mV below GND, may prevent successful SMBus communication with the LM95221. SMBus no acknowledge is the most common symptom, causing unnecessary traffic on the bus. Although the SMBus maximum frequency of communication is rather low (100kHz max), care still needs to be taken to ensure proper termination within a system with multiple parts on the bus and long printed circuit board traces. An RC lowpass filter with a 3db corner frequency of about 40MHz is included on the LM95221's SMBCLK input. Additional resistance can be added in series with the SMBDAT and SMBCLK lines to further help filter noise and ringing. Minimize noise coupling by keeping digital traces out of switching power supply areas as well as ensuring that digital lines containinghighspeeddatacommunicationscrossatrightanglestotheSMBDATandSMBCLKlines. 18 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM95221

LM95221 www.ti.com SNIS134B–MAY2004–REVISEDMARCH2013 REVISION HISTORY ChangesfromRevisionA(March2013)toRevisionB Page • ChangedlayoutofNationalDataSheettoTIformat.......................................................................................................... 18 Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLinks:LM95221

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 PACKAGING INFORMATION Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples (1) Drawing Qty (2) (6) (3) (4/5) LM95221CIMM/NOPB ACTIVE VSSOP DGK 8 1000 Green (RoHS SN Level-1-260C-UNLIM 0 to 85 T21C & no Sb/Br) LM95221CIMMX/NOPB ACTIVE VSSOP DGK 8 3500 Green (RoHS SN Level-1-260C-UNLIM 0 to 85 T21C & no Sb/Br) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 Addendum-Page 2

PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 TAPE AND REEL INFORMATION *Alldimensionsarenominal Device Package Package Pins SPQ Reel Reel A0 B0 K0 P1 W Pin1 Type Drawing Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant (mm) W1(mm) LM95221CIMM/NOPB VSSOP DGK 8 1000 178.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 LM95221CIMMX/NOPB VSSOP DGK 8 3500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 23-Sep-2013 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) LM95221CIMM/NOPB VSSOP DGK 8 1000 210.0 185.0 35.0 LM95221CIMMX/NOPB VSSOP DGK 8 3500 367.0 367.0 35.0 PackMaterials-Page2

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