LM19 2.4V, 10A, TO-92 Temperature Sensor datasheet (Rev. E)

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  • Manufacturer or author: Texas Instruments, Incorporated [SNIS122,E]
  • PDF pages: 15

Technical content

www.ti.com SNIS122E –MAY 2001–REVISED MARCH 2013 LM192.4V,10µA,TO-92TemperatureSensor Check forSamples: LM19 1FEATURES DESCRIPTION The LM19 is a precisionanalog output CMOS 2• Rated forFull−55°C to+130°C Range integrated-circuittemperaturesensor thatoperates• Availableina TO-92 Package over a −55°C to +130°C temperaturerange. The

  • PredictableCurvatureError power supplyoperatingrange is+2.4 V to +5.5 V. The transferfunctionofLM19 ispredominatelylinear,• SuitableforRemote Applications yethas a slightpredictableparaboliccurvature.The• UL Recognized Component accuracyof the LM19 when specifiedto a parabolic transferfunctionis±2.5°C atan ambienttemperatureAPPLICATIONS of +30°C. The temperatureerrorincreaseslinearly and reaches a maximum of ±3.8°C at the• CellularPhones temperaturerange extremes.The temperaturerange• Computers isaffectedby the power supplyvoltage.At a power
  • Power Supply Modules supply voltageof 2.7 V to 5.5 V the temperature range extremesare +130°C and −55°C. Decreasing• BatteryManagement the power supply voltageto 2.4 V changes the• FAX Machines negative extreme to −30°C, while the positive• Printers remainsat+130°C.
  • HVAC The LM19's quiescentcurrentis lessthan 10 μA.
  • Disk Drives Therefore,self-heatingislessthan0.02°C instillair. Shutdown capabilityfortheLM19 isintrinsicbecause• Appliances itsinherentlow power consumptionallowsitto be powered directlyfrom theoutputofmany logicgatesKEY SPECIFICATIONS ordoes notnecessitateshutdownatall.• Accuracy at+30°C ±2.5°C (max)
  • Accuracy at+130°C & −55°C ±3.5to±3.8°C (max)
  • Power Supply VoltageRange +2.4V to+5.5V
  • CurrentDrain10 μA (max)
  • Nonlinearity±0.4% (typ)
  • Output Impedance 160 Ω (max)
  • Load Regulation – 0µA < IL< +16 µA Pleasebe aware thatan importantnoticeconcerningavailability,standardwarranty,and use incriticalapplicationsof Texas Instrumentssemiconductorproductsand disclaimerstheretoappearsattheend ofthisdatasheet. 2Alltrademarksarethepropertyoftheirrespectiveowners. PRODUCTION DATA informationiscurrentas ofpublicationdate. Copyright© 2001–2013,Texas InstrumentsIncorporatedProductsconform to specificationsper the terms of the Texas Instrumentsstandardwarranty.Productionprocessingdoes not necessarilyincludetestingofallparameters.

SNIS122E –MAY 2001–REVISED MARCH 2013 www.ti.com TypicalApplication Output Voltagevs Temperature or where: T istemperature,and VO isthemeasured outputvoltageofthe LM19. Figure1. Full-RangeCelsius(Centigrade)Temperature Sensor (−55°C to+130°C) Operatingfrom a SingleLi-IonBatteryCell Temperature (T) TypicalVO +130°C +303 mV +100°C +675 mV +80°C +919 mV +30°C +1515 mV +25°C +1574 mV 0°C +1863.9mV −30°C +2205 mV −40°C +2318 mV −55°C +2485 mV Connection Diagram Figure2. TO-92 Package Number LP These deviceshave limitedbuilt-inESD protection.The leadsshouldbe shortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamage totheMOS gates.

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www.ti.com SNIS122E –MAY 2001–REVISED MARCH 2013 AbsoluteMaximum Ratings(1) SupplyVoltage +6.5V to−0.2V OutputVoltage (V+ + 0.6V) to−0.6V OutputCurrent 10 mA InputCurrentatany pin(2) 5 mA StorageTemperature −65°C to+150°C Maximum JunctionTemperature(TJMAX ) +150°C ESD Susceptibility(3) Human Body Model 2500 V Machine Model 250 V Lead Temperature TO-92 Package Soldering(3secondsdwell) +240°C (1) AbsoluteMaximum Ratingsindicatelimitsbeyond whichdamage tothedevicemay occur.OperatingRatingsindicateconditionsfor whichthedeviceisfunctional,butdo notensurespecificperformancelimits.Forensuredspecificationsand testconditions,see the ElectricalCharacteristics.The specifiedspecificationsapplyonlyforthetestconditionslisted.Some performancecharacteristicsmay degradewhen thedeviceisnotoperatedunderthelistedtestconditions. (2) When theinputvoltage(VI)atany pinexceedspower supplies(VI< GND orVI> V+),thecurrentatthatpinshouldbe limitedto5 mA. (3) The human body model isa 100 pF capacitordischargedthrougha 1.5kΩ resistorintoeach pin.The machine model isa 200 pF capacitordischargeddirectlyintoeach pin. OperatingRatings(1) SpecifiedTemperatureRange TMIN ≤ TA ≤ TMAX SupplyVoltageRange (V+) +2.4V to+5.5V ThermalResistance,θJA (2) TO-92 150°C/W (1) AbsoluteMaximum Ratingsindicatelimitsbeyond whichdamage tothedevicemay occur.OperatingRatingsindicateconditionsfor whichthedeviceisfunctional,butdo notensurespecificperformancelimits.Forensuredspecificationsand testconditions,see the ElectricalCharacteristics.The specifiedspecificationsapplyonlyforthetestconditionslisted.Some performancecharacteristicsmay degradewhen thedeviceisnotoperatedunderthelistedtestconditions. (2) The junctiontoambientthermalresistance(θJA)isspecifiedwithouta heatsinkinstillair. Copyright© 2001–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LM19

SNIS122E –MAY 2001–REVISED MARCH 2013 www.ti.com ElectricalCharacteristics Unlessotherwisenoted,thesespecificationsapplyforV+ = +2.7VDC .BoldfacelimitsapplyforTA = TJ = TMIN toTMAX ;all otherlimitsTA = TJ = 25°C; Unlessotherwisenoted. Parameter Conditions Typical(1) LM19C Units (Limit)Limits(2) TemperaturetoVoltageError TA = +25°C to+30°C ±2.5 °C (max) TA = +125°C ±3.5 °C (max) TA = +100°C ±3.2 °C (max) TA = +85°C ±3.1 °C (max) TA = +80°C ±3.0 °C (max) TA = 0°C ±2.9 °C (max) TA = −30°C ±3.3 °C (min) TA = −40°C ±3.5 °C (max) TA = −55°C ±3.8 °C (max) OutputVoltageat0°C +1.8639 V VariancefromCurve ±1.0 °C Non-Linearity(4) −20°C ≤ TA ≤ +80°C ±0.4 % SensorGain (TemperatureSensitivity−30°C ≤ TA ≤ +100°C −11.77 −11.0 mV/°C (min) orAverageSlope)toequation: −12.6 mV/°C (max) VO =−11.77mV/°C ×T+1.860V OutputImpedance 0 μA ≤ IL ≤ +16 μA (5)(6) 160 Ω (max) Load Regulation(7) 0 μA ≤ IL ≤ +16 μA (5)(6) −2.5 mV (max) LineRegulation(8) +2.4 V ≤ V+ ≤ +5.0V +3.7 mV/V (max) +5.0V ≤ V+ ≤ +5.5V +11 mV (max) QuiescentCurrent +2.4 V ≤ V+ ≤ +5.0V 4.5 7 μA (max) Change ofQuiescentCurrent +2.4 V ≤ V+ ≤ +5.5V +0.7 μA TemperatureCoefficientofQuiescent −11 nA/°CCurrent Shutdown Current V+ ≤ +0.8V 0.02 μA (1) TypicalsareatTJ = TA = 25°C and representmost likelyparametricnorm. (2) LimitsareensuredtoAOQL (AverageOutgoingQualityLevel). (3) Accuracyisdefinedas theerrorbetween themeasured and calculatedoutputvoltageatthespecifiedconditionsofvoltage,current,and temperature(expressedin°C). (4) Non-Linearityisdefinedas thedeviationofthecalculatedoutput-voltage-versus-temperaturecurvefromthebest-fitstraightline,over thetemperaturerangespecified. (5) NegativecurrentsareflowingintotheLM19. PositivecurrentsareflowingoutoftheLM19. UsingthisconventiontheLM19 can atmost sink−1 μA and source+16 μA. (6) Load regulationoroutputimpedance specificationsapplyoverthesupplyvoltagerangeof+2.4V to+5.5V. (7) Regulationismeasured atconstantjunctiontemperature,usingpulsetestingwitha lowdutycycle.Changes inoutputdue toheating effectscan be computed by multiplyingtheinternaldissipationby thethermalresistance. (8) Lineregulationiscalculatedby subtractingtheoutputvoltageatthehighestsupplyinputvoltagefromtheoutputvoltageatthelowest supplyinputvoltage.

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  • T isthemiddleofthetemperaturerangeofinterestand m isinV/°C. (4) Forexample forthetemperaturerangeofTmin = −30 toTmax = +100°C: T = 35°C and m = −11.77mV/°C The offsetofthelineartransferfunctioncan be calculatedusingthefollowingequation: b = (VOP (Tmax )+ VOP (T)− m × (Tmax +T))/2 where
  • VOP (Tmax )isthecalculatedoutputvoltageatTmax usingtheparabolictransferfunctionforVO .
  • VOP (T)isthecalculatedoutputvoltageatT usingtheparabolictransferfunctionforVO . (5) Using thisprocedurethebestfitlineartransferfunctionformany populartemperaturerangeswas calculatedin

Table 1. As shown inTable 1 the errorthatisintroducedby the lineartransferfunctionincreaseswithwider

SNIS122E –MAY 2001–REVISED MARCH 2013 www.ti.com Table1.FirstOrder EquationsOptimizedFor DifferentTemperature Ranges TemperatureRange LinearEquation Maximum DeviationofLinearEquationfrom VO = ParabolicEquation(°C)Tmin (°C) Tmax (°C) Mounting The LM19 can be appliedeasilyinthesame way as otherintegrated-circuittemperaturesensors.Itcan be glued orcemented toa surface.The temperaturethattheLM19 issensingwillbe withinabout+0.02°C ofthesurface temperaturetowhichtheLM19's leadsareattached. This presumes thatthe ambient airtemperatureis almost the same as the surfacetemperature;ifthe air temperaturewere much higheror lowerthanthesurfacetemperature,theactualtemperaturemeasured would be atan intermediatetemperaturebetween thesurfacetemperatureand theairtemperature. To ensure good thermalconductivitythe backsideof the LM19 dieisdirectlyattachedto the GND pin.The temperturesofthelandsand tracestotheotherleadsoftheLM19 willalsoaffectthetemperaturethatisbeing sensed. Alternatively,theLM19 can be mounted insidea sealed-endmetaltube,and can thenbe dippedintoa bathor screwed intoa threadedholeina tank.As withany IC,theLM19 and accompanyingwiringand circuitsmust be keptinsulatedand dry,toavoidleakageand corrosion.Thisisespeciallytrueifthecircuitmay operateatcold temperatureswhere condensationcan occur.Printed-circuitcoatingsand varnishessuch as Humisealand epoxy paintsordipsareoftenused toensurethatmoisturecannotcorrodetheLM19 oritsconnections. The thermalresistancejunctiontoambient(θJA)istheparameterused tocalculatetheriseofa devicejunction temperaturedue to itspower dissipation.For the LM19 the equationused to calculatethe risein the die temperatureisas follows: TJ = TA + θJA [(V+ IQ )+ (V+ − VO )IL] where

  • IQ isthequiescentcurrentand IListheloadcurrenton theoutput. (6) Since the LM19's junctiontemperatureis the actualtemperaturebeing measured care should be taken to minimizetheloadcurrentthattheLM19 isrequiredtodrive. Table2 summarizes theriseindietemperatureoftheLM19 withoutany loading,and thethermalresistancefor differentconditions. Table2.Temperature Rise ofLM19 Due toSelf-Heatingand Thermal Resistance(θJA ) TO-92 TO-92 no heatsink smallheatfin θJA TJ − TA θJA TJ − TA (°C/W) (°C) (°C/W) (°C) Stillair 150 TBD TBD TBD Moving air TBD TBD TBD TBD

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www.ti.com SNIS122E –MAY 2001–REVISED MARCH 2013 CapacitiveLoads The LM19 handlescapacitiveloadingwell.Withoutany precautions,theLM19 can driveany capacitiveloadless than 300 pF as shown inFigure3. Over the specifiedtemperaturerange the LM19 has a maximum output impedance of160 Ω.Inan extremelynoisyenvironmentitmay be necessarytoadd some filteringtominimize noisepickup.Itisrecommended that0.1μF be added fromV+ toGND tobypass thepower supplyvoltage,as shown inFigure4.Ina noisyenvironmentitmay even be necessarytoadd a capacitorfromtheoutputtoground witha seriesresistoras shown inFigure4.A 1 μF outputcapacitorwiththe160 Ω maximum outputimpedance and a 200 Ω seriesresistorwillform a 442 Hz lowpass filter.Since the thermaltimeconstantof the LM19 is much slower,theoverallresponsetimeoftheLM19 willnotbe significantlyaffected. Figure3. LM19 No Decoupling Required forCapacitiveLoads Less than 300 pF Table3.LM19 withFilterforNoisy Environment and CapacitiveLoading greaterthan 300 pF R (Ω) C (µF) 200 1 470 0.1 680 0.01 1 k 0.001 Eitherplacementofresistoras shown above isjustas effective. Figure4. LM19 withFilterforNoisy Environment and CapacitiveLoading greaterthan 300 pF Copyright© 2001–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LM19

R14.1V R20.1 PFU3LM4040 VOUT VT VTemp LM19V+ (High = overtemp alarm) VT1 VT2 VTEMP VOUT VT1 = R1 + R2||R3 (4.1)R2 VT2 = R2 + R1||R3 (4.1)R2||R3 LM7211 LM19 SNIS122E –MAY 2001–REVISED MARCH 2013 www.ti.com ApplicationsCircuits Figure5. CentigradeThermostat Figure6. Conserving Power DissipationwithShutdown Figure7. Suggested Connection toa Sampling Analog toDigitalConverterInputStage Most CMOS ADCs foundinASICs have a sampled datacomparatorinputstructurethatisnotoriousforcausing grieftoanalogoutputdevicessuch as theLM19 and many op amps. The cause ofthisgriefistherequirementof instantaneouschargeoftheinputsamplingcapacitorintheADC. Thisrequirementiseasilyaccommodated by the additionof a capacitor.Since not allADCs have identicalinputstages,the charge requirementswillvary necessitatinga differentvalueof compensatingcapacitor.ThisADC isshown as an example only.Ifa digital outputtemperatureisrequiredpleaserefertodevicessuch as theLM74.

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REVISION HISTORY

Changes from RevisionD (March 2013)toRevisionE Page Copyright© 2001–2013,Texas InstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LM19

www.ti.com 11-Nov-2025 PACKAGING INFORMATION Orderable part number Status (1) Material type (2) Package | Pins Package qty | Carrier RoHS (3) Lead finish/ Ball material (4) MSL rating/ Peak reflow (5) Op temp (°C) Part marking (6) LM19CIZ/LFT4 Active Production TO-92 (LP) | 3 2000 | LARGE T&R Yes SN N/A for Pkg Type - LM19 CIZ LM19CIZ/LFT4.A Active Production TO-92 (LP) | 3 2000 | LARGE T&R Yes SN N/A for Pkg Type -55 to 130 LM19 CIZ LM19CIZ/NOPB Active Production TO-92 (LP) | 3 1800 | SMALL T&R Yes SN N/A for Pkg Type -55 to 130 LM19 CIZ LM19CIZ/NOPB.A Active Production TO-92 (LP) | 3 1800 | SMALL T&R Yes SN N/A for Pkg Type -55 to 130 LM19 CIZ (1) Status: For more details on status, see our product life cycle. (2) Material type: When designated, preproduction parts are prototypes/experimental devices, and are not yet approved or released for full production. Testing and final process, including without limitation quality assurance, reliability performance testing, and/or process qualification, may not yet be complete, and this item is subject to further changes or possible discontinuation. If available for ordering, purchases will be subject to an additional waiver at checkout, and are intended for early internal evaluation purposes only. These items are sold without warranties of any kind. (3) RoHS values: Yes, No, RoHS Exempt. See the TI RoHS Statement for additional information and value definition. (4) Lead finish/Ball material: Parts may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two lines if the finish value exceeds the maximum column width. (5) MSL rating/Peak reflow: The moisture sensitivity level ratings and peak solder (reflow) temperatures. In the event that a part has multiple moisture sensitivity ratings, only the lowest level per JEDEC standards is shown. Refer to the shipping label for the actual reflow temperature that will be used to mount the part to the printed circuit board. (6) Part marking: There may be an additional marking, which relates to the logo, the lot trace code information, or the environmental category of the part. Multiple part markings will be inside parentheses. Only one part marking contained in parentheses and separated by a "~" will appear on a part. If a line is indented then it is a continuation of the previous line and the two combined represent the entire part marking for that device. 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

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www.ti.com PACKAGE OUTLINE 3X 2.67 2.03 5.21 4.44 5.34 4.32

12.7 MIN

2X 1.27 0.13 3X 0.55 0.38 4.19 3.17

3.43 MIN

3X 0.43 0.35 (2.54) NOTE 3 2X 2.9 2.4

4 MAX

0.076 MAX

(0.51) TYP (1.5) TYP TO-92 - 5.34 mm max heightLP0003A TO-92 4215214/C 04/2025 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. EJECTOR PIN OPTIONAL PLANE SEATING STRAIGHT LEAD OPTION 3 2 1 SCALE 1.200 FORMED LEAD OPTION OTHER DIMENSIONS IDENTICAL TO STRAIGHT LEAD OPTION SCALE 1.200

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0.05 MAX

(1.07) (1.5) 2X (1.5) 2X (1.07) (1.27) (2.54) FULL R TYP ( 1.4)0.05 MAX ALL AROUND TYP (2.6) (5.2) (R0.05) TYP 3X ( 0.9) HOLE 2X ( 1.4) METAL 3X ( 0.85) HOLE (R0.05) TYP 4215214/C 04/2025 TO-92 - 5.34 mm max heightLP0003A TO-92 LAND PATTERN EXAMPLE FORMED LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X SOLDER MASK OPENING METAL SOLDER MASK OPENING 1 2 3 LAND PATTERN EXAMPLE STRAIGHT LEAD OPTION NON-SOLDER MASK DEFINED SCALE:15X METAL TYP SOLDER MASK OPENING SOLDER MASK OPENING METAL 1 2 3

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