LM19 www.ti.com SNIS122E–MAY2001–REVISEDMARCH2013 LM19 2.4V, 10µA, TO-92 Temperature Sensor CheckforSamples:LM19 FEATURES DESCRIPTION 1 • RatedforFull−55°Cto+130°CRange The LM19 is a precision analog output CMOS 2 integrated-circuit temperature sensor that operates • AvailableinaTO-92Package over a −55°C to +130°C temperature range. The • PredictableCurvatureError power supply operating range is +2.4 V to +5.5 V. • SuitableforRemoteApplications The transfer function of LM19 is predominately linear, yet has a slight predictable parabolic curvature. The • ULRecognizedComponent accuracy of the LM19 when specified to a parabolic transfer function is ±2.5°C at an ambient temperature APPLICATIONS of +30°C. The temperature error increases linearly • CellularPhones and reaches a maximum of ±3.8°C at the temperature range extremes. The temperature range • Computers is affected by the power supply voltage. At a power • PowerSupplyModules supply voltage of 2.7 V to 5.5 V the temperature • BatteryManagement range extremes are +130°C and −55°C. Decreasing the power supply voltage to 2.4 V changes the • FAXMachines negative extreme to −30°C, while the positive • Printers remainsat+130°C. • HVAC The LM19's quiescent current is less than 10 μA. • DiskDrives Therefore, self-heating is less than 0.02°C in still air. • Appliances Shutdown capability for the LM19 is intrinsic because its inherent low power consumption allows it to be KEY SPECIFICATIONS powered directly from the output of many logic gates ordoesnotnecessitateshutdownatall. • Accuracyat+30°C±2.5°C(max) • Accuracyat+130°C&−55°C±3.5to±3.8°C (max) • PowerSupplyVoltageRange+2.4Vto+5.5V • CurrentDrain10μA(max) • Nonlinearity±0.4%(typ) • OutputImpedance160Ω (max) • LoadRegulation – 0µA <I <+16 µA L 1 Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet. Alltrademarksarethepropertyoftheirrespectiveowners. 2 PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©2001–2013,TexasInstrumentsIncorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarilyincludetestingofallparameters.

LM19 SNIS122E–MAY2001–REVISEDMARCH2013 www.ti.com Typical Application OutputVoltagevsTemperature V =(−3.88×10−6×T2)+(−1.15×10−2×T)+1.8639 O or where: Tistemperature,andV isthemeasuredoutputvoltageofthe O LM19. Figure1. Full-RangeCelsius(Centigrade)TemperatureSensor(−55°Cto+130°C)Operatingfroma SingleLi-IonBatteryCell Temperature(T) TypicalV O +130°C +303mV +100°C +675mV +80°C +919mV +30°C +1515mV +25°C +1574mV 0°C +1863.9mV −30°C +2205mV −40°C +2318mV −55°C +2485mV Connection Diagram Figure2. TO-92 PackageNumberLP Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. 2 SubmitDocumentationFeedback Copyright©2001–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM19

LM19 www.ti.com SNIS122E–MAY2001–REVISEDMARCH2013 Absolute Maximum Ratings(1) SupplyVoltage +6.5Vto−0.2V OutputVoltage (V++0.6V)to−0.6V OutputCurrent 10mA InputCurrentatanypin(2) 5mA StorageTemperature −65°Cto+150°C MaximumJunctionTemperature(T ) +150°C JMAX ESDSusceptibility(3) HumanBodyModel 2500V MachineModel 250V LeadTemperature TO-92Package Soldering(3secondsdwell) +240°C (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsfor whichthedeviceisfunctional,butdonotensurespecificperformancelimits.Forensuredspecificationsandtestconditions,seethe ElectricalCharacteristics.Thespecifiedspecificationsapplyonlyforthetestconditionslisted.Someperformancecharacteristicsmay degradewhenthedeviceisnotoperatedunderthelistedtestconditions. (2) Whentheinputvoltage(V)atanypinexceedspowersupplies(V <GNDorV >V+),thecurrentatthatpinshouldbelimitedto5mA. I I I (3) Thehumanbodymodelisa100pFcapacitordischargedthrougha1.5kΩresistorintoeachpin.Themachinemodelisa200pF capacitordischargeddirectlyintoeachpin. Operating Ratings(1) SpecifiedTemperatureRange T ≤T ≤T MIN A MAX 2.4V≤V+≤2.7V −30°C≤T ≤+130°C A 2.7V≤V+≤5.5V −55°C≤T ≤+130°C A SupplyVoltageRange(V+) +2.4Vto+5.5V ThermalResistance,θ (2) TO-92 150°C/W JA (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsfor whichthedeviceisfunctional,butdonotensurespecificperformancelimits.Forensuredspecificationsandtestconditions,seethe ElectricalCharacteristics.Thespecifiedspecificationsapplyonlyforthetestconditionslisted.Someperformancecharacteristicsmay degradewhenthedeviceisnotoperatedunderthelistedtestconditions. (2) Thejunctiontoambientthermalresistance(θ )isspecifiedwithoutaheatsinkinstillair. JA Copyright©2001–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LM19

LM19 SNIS122E–MAY2001–REVISEDMARCH2013 www.ti.com Electrical Characteristics Unlessotherwisenoted,thesespecificationsapplyforV+=+2.7V .BoldfacelimitsapplyforT =T =T toT ;all DC A J MIN MAX otherlimitsT =T =25°C;Unlessotherwisenoted. A J Parameter Conditions Typical(1) LM19C Units Limits(2) (Limit) TemperaturetoVoltageError T =+25°Cto+30°C ±2.5 °C(max) A V =(−3.88×10−6×T2) O T =+130°C ±3.5 °C(max) +(−1.15×10−2×T)+1.8639V(3) A T =+125°C ±3.5 °C(max) A T =+100°C ±3.2 °C(max) A T =+85°C ±3.1 °C(max) A T =+80°C ±3.0 °C(max) A T =0°C ±2.9 °C(max) A T =−30°C ±3.3 °C(min) A T =−40°C ±3.5 °C(max) A T =−55°C ±3.8 °C(max) A OutputVoltageat0°C +1.8639 V VariancefromCurve ±1.0 °C Non-Linearity(4) −20°C≤T ≤+80°C ±0.4 % A SensorGain(TemperatureSensitivity −30°C≤T ≤+100°C −11.77 −11.0 mV/°C(min) A orAverageSlope)toequation: −12.6 mV/°C(max) V =−11.77mV/°C×T+1.860V O OutputImpedance 0μA≤I ≤+16μA(5)(6) 160 Ω(max) L LoadRegulation(7) 0μA≤I ≤+16μA(5)(6) −2.5 mV(max) L LineRegulation(8) +2.4V≤V+≤+5.0V +3.7 mV/V(max) +5.0V≤V+≤+5.5V +11 mV(max) QuiescentCurrent +2.4V≤V+≤+5.0V 4.5 7 μA(max) +5.0V≤V+≤+5.5V 4.5 9 μA(max) +2.4V≤V+≤+5.0V 4.5 10 μA(max) ChangeofQuiescentCurrent +2.4V≤V+≤+5.5V +0.7 μA TemperatureCoefficientofQuiescent −11 nA/°C Current ShutdownCurrent V+≤+0.8V 0.02 μA (1) TypicalsareatT =T =25°Candrepresentmostlikelyparametricnorm. J A (2) LimitsareensuredtoAOQL(AverageOutgoingQualityLevel). (3) Accuracyisdefinedastheerrorbetweenthemeasuredandcalculatedoutputvoltageatthespecifiedconditionsofvoltage,current,and temperature(expressedin°C). (4) Non-Linearityisdefinedasthedeviationofthecalculatedoutput-voltage-versus-temperaturecurvefromthebest-fitstraightline,over thetemperaturerangespecified. (5) NegativecurrentsareflowingintotheLM19.PositivecurrentsareflowingoutoftheLM19.UsingthisconventiontheLM19canatmost sink−1μAandsource+16μA. (6) Loadregulationoroutputimpedancespecificationsapplyoverthesupplyvoltagerangeof+2.4Vto+5.5V. (7) Regulationismeasuredatconstantjunctiontemperature,usingpulsetestingwithalowdutycycle.Changesinoutputduetoheating effectscanbecomputedbymultiplyingtheinternaldissipationbythethermalresistance. (8) Lineregulationiscalculatedbysubtractingtheoutputvoltageatthehighestsupplyinputvoltagefromtheoutputvoltageatthelowest supplyinputvoltage. 4 SubmitDocumentationFeedback Copyright©2001–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM19

LM19 www.ti.com SNIS122E–MAY2001–REVISEDMARCH2013 Typical Performance Characteristics TemperatureErrorvs.Temperature ThermalResponseinStillAir 5 4 MAX Limit 3 2 C) Typical º 1 R ( 0 O R R -1 E -2 MIN Limit -3 -4 -5 -100 -50 0 50 100 150 TEMPERATURE (ºC) LM19 TRANSFER FUNCTION The LM19's transfer function can be described in different ways with varying levels of precision. A simple linear transferfunction,withgoodaccuracynear25°C,is V =−11.69mV/°C×T+1.8663V (1) O Over the full operating temperature range of −55°C to +130°C, best accuracy can be obtained by using the parabolictransferfunction V =(−3.88×10−6×T2)+(−1.15×10−2×T)+1.8639 (2) O solvingforT: (3) Alineartransferfunctioncanbeusedoveralimitedtemperaturerangebycalculatingaslopeandoffsetthatgive best results over that range. A linear transfer function can be calculated from the parabolic transfer function of theLM19.Theslopeofthelineartransferfunctioncanbecalculatedusingthefollowingequation: m=−7.76×10−6×T−0.0115 where • TisthemiddleofthetemperaturerangeofinterestandmisinV/°C. (4) ForexampleforthetemperaturerangeofT =−30toT =+100°C: min max T=35°C and m=−11.77mV/°C Theoffsetofthelineartransferfunctioncanbecalculatedusingthefollowingequation: b=(V (T )+V (T)−m×(T +T))/2 OP max OP max where • V (T )isthecalculatedoutputvoltageatT usingtheparabolictransferfunctionforV . OP max max O • V (T)isthecalculatedoutputvoltageatTusingtheparabolictransferfunctionforV . (5) OP O Using this procedure the best fit linear transfer function for many popular temperature ranges was calculated in Table 1. As shown in Table 1 the error that is introduced by the linear transfer function increases with wider temperatureranges. Copyright©2001–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LM19

LM19 SNIS122E–MAY2001–REVISEDMARCH2013 www.ti.com Table1.FirstOrderEquationsOptimizedForDifferentTemperatureRanges TemperatureRange LinearEquation MaximumDeviationofLinearEquationfrom V = ParabolicEquation(°C) T (°C) T (°C) O min max −55 +130 −11.79mV/°C×T+1.8528V ±1.41 −40 +110 −11.77mV/°C×T+1.8577V ±0.93 −30 +100 −11.77mV/°C×T+1.8605V ±0.70 -40 +85 −11.67mV/°C×T+1.8583V ±0.65 −10 +65 −11.71mV/°C×T+1.8641V ±0.23 +35 +45 −11.81mV/°C×T+1.8701V ±0.004 +20 +30 −11.69mV/°C×T+1.8663V ±0.004 Mounting The LM19 can be applied easily in the same way as other integrated-circuit temperature sensors. It can be glued or cemented to a surface. The temperature that the LM19 is sensing will be within about +0.02°C of the surface temperaturetowhichtheLM19'sleadsareattached. This presumes that the ambient air temperature is almost the same as the surface temperature; if the air temperature were much higher or lower than the surface temperature, the actual temperature measured would beatanintermediatetemperaturebetweenthesurfacetemperatureandtheairtemperature. To ensure good thermal conductivity the backside of the LM19 die is directly attached to the GND pin. The tempertures of the lands and traces to the other leads of the LM19 will also affect the temperature that is being sensed. Alternatively, the LM19 can be mounted inside a sealed-end metal tube, and can then be dipped into a bath or screwed into a threaded hole in a tank. As with any IC, the LM19 and accompanying wiring and circuits must be kept insulated and dry, to avoid leakage and corrosion. This is especially true if the circuit may operate at cold temperatures where condensation can occur. Printed-circuit coatings and varnishes such as Humiseal and epoxy paintsordipsareoftenusedtoensurethatmoisturecannotcorrodetheLM19oritsconnections. The thermal resistance junction to ambient (θ ) is the parameter used to calculate the rise of a device junction JA temperature due to its power dissipation. For the LM19 the equation used to calculate the rise in the die temperatureisasfollows: T =T +θ [(V+I )+(V+−V )I ] J A JA Q O L where • I isthequiescentcurrentandI istheloadcurrentontheoutput. (6) Q L Since the LM19's junction temperature is the actual temperature being measured care should be taken to minimizetheloadcurrentthattheLM19isrequiredtodrive. Table 2 summarizes the rise in die temperature of the LM19 without any loading, and the thermal resistance for differentconditions. Table2.TemperatureRiseofLM19DuetoSelf-HeatingandThermalResistance(θ ) JA TO-92 TO-92 noheatsink smallheatfin θ T −T θ T −T JA J A JA J A (°C/W) (°C) (°C/W) (°C) Stillair 150 TBD TBD TBD Movingair TBD TBD TBD TBD 6 SubmitDocumentationFeedback Copyright©2001–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM19

LM19 www.ti.com SNIS122E–MAY2001–REVISEDMARCH2013 Capacitive Loads The LM19 handles capacitive loading well. Without any precautions, the LM19 can drive any capacitive load less than 300 pF as shown in Figure 3. Over the specified temperature range the LM19 has a maximum output impedance of 160 Ω. In an extremely noisy environment it may be necessary to add some filtering to minimize noise pickup. It is recommended that 0.1 μF be added from V+ to GND to bypass the power supply voltage, as showninFigure4.Inanoisyenvironmentitmayevenbenecessarytoaddacapacitorfromtheoutputtoground with a series resistor as shown in Figure 4. A 1 μF output capacitor with the 160 Ω maximum output impedance and a 200 Ω series resistor will form a 442 Hz lowpass filter. Since the thermal time constant of the LM19 is muchslower,theoverallresponsetimeoftheLM19willnotbesignificantlyaffected. Figure3. LM19NoDecouplingRequiredforCapacitiveLoadsLessthan300pF Table3.LM19withFilterforNoisyEnvironment andCapacitiveLoadinggreaterthan300pF R(Ω) C(µF) 200 1 470 0.1 680 0.01 1k 0.001 Eitherplacementofresistorasshown aboveisjustaseffective. Figure4. LM19withFilterforNoisyEnvironment andCapacitiveLoadinggreaterthan300pF Copyright©2001–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LM19

LM19 SNIS122E–MAY2001–REVISEDMARCH2013 www.ti.com Applications Circuits V+ R3 VTEMP VT1 R4 VT2 4.1V R1 VT (High = overtemp alarm) +U1 VOUT VOUT LM4040 U3 0.1 PF - R2 LM7211 (4.1)R2 VT1= R2 + R1||R3 V+ LM19 VTemp (4.1)R2||R3 U2 VT2= R1 + R2||R3 Figure5. CentigradeThermostat Figure6. ConservingPowerDissipationwithShutdown Figure7. SuggestedConnectiontoaSamplingAnalogtoDigitalConverterInputStage Most CMOS ADCs found in ASICs have a sampled data comparator input structure that is notorious for causing grieftoanalogoutputdevicessuchastheLM19andmanyopamps.Thecauseofthisgriefistherequirementof instantaneous charge of the input sampling capacitor in the ADC. This requirement is easily accommodated by the addition of a capacitor. Since not all ADCs have identical input stages, the charge requirements will vary necessitating a different value of compensating capacitor. This ADC is shown as an example only. If a digital outputtemperatureisrequiredpleaserefertodevicessuchastheLM74. 8 SubmitDocumentationFeedback Copyright©2001–2013,TexasInstrumentsIncorporated ProductFolderLinks:LM19

LM19 www.ti.com SNIS122E–MAY2001–REVISEDMARCH2013 REVISION HISTORY ChangesfromRevisionD(March2013)toRevisionE Page • ChangedlayoutofNationalDataSheettoTIformat............................................................................................................ 8 Copyright©2001–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LM19

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) LM19CIZ/LFT4 ACTIVE TO-92 LP 3 2000 Green (RoHS SN N / A for Pkg Type LM19 & no Sb/Br) CIZ LM19CIZ/NOPB ACTIVE TO-92 LP 3 1800 Green (RoHS SN N / A for Pkg Type -55 to 130 LM19 & no Sb/Br) CIZ (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

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PACKAGE OUTLINE LP0003A TO-92 - 5.34 mm max height SCALE 1.200 SCALE 1.200 TO-92 5.21 4.44 EJECTOR PIN OPTIONAL 5.34 4.32 (1.5) TYP (2.54) SEATING 2X NOTE 3 PLANE 4 MAX (0.51) TYP 6X 0.076 MAX SEATING PLANE 3X 12.7 MIN 0.43 2X 0.55 3X 3X 0.35 2.6 0.2 0.38 2X 1.27 0.13 FORMED LEAD OPTION OTHER DIMENSIONS IDENTICAL STRAIGHT LEAD OPTION TO STRAIGHT LEAD OPTION 2.67 3X 2.03 4.19 3.17 3 2 1 3.43 MIN 4215214/B 04/2017 NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. Lead dimensions are not controlled within this area. 4. Reference JEDEC TO-226, variation AA. 5. Shipping method: a. Straight lead option available in bulk pack only. b. Formed lead option available in tape and reel or ammo pack. c. Specific products can be offered in limited combinations of shipping medium and lead options. d. Consult product folder for more information on available options. www.ti.com

EXAMPLE BOARD LAYOUT LP0003A TO-92 - 5.34 mm max height TO-92 FULL R TYP 0.05 MAX (1.07) ALL AROUND METAL 3X ( 0.85) HOLE TYP TYP 2X METAL (1.5) 2X (1.5) 2X SOLDER MASK OPENING 1 2 3 (R0.05) TYP 2X (1.07) (1.27) SOLDER MASK (2.54) OPENING LAND PATTERN EXAMPLE STRAIGHT LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X 0.05 MAX ( 1.4) 2X ( 1.4) ALL AROUND METAL TYP 3X ( 0.9) HOLE METAL 2X (R0.05) TYP 1 2 3 SOLDER MASK OPENING (2.6) SOLDER MASK OPENING (5.2) LAND PATTERN EXAMPLE FORMED LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X 4215214/B 04/2017 www.ti.com

TAPE SPECIFICATIONS LP0003A TO-92 - 5.34 mm max height TO-92 13.7 11.7 32 23 (2.5) TYP 0.5 MIN 16.5 15.5 11.0 9.75 8.5 8.50 19.0 17.5 2.9 6.75 3.7-4.3 TYP TYP 2.4 5.95 13.0 12.4 FOR FORMED LEAD OPTION PACKAGE 4215214/B 04/2017 www.ti.com

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