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MicronSensIR™Infrared Emitter and Detectors

New Technology Provides Industry-Leading Sensitivity, Reliability and DurabiltyIn the detection and identification of gases in the 1.0 to 5.5 µm infrared region, PbS and PbSe detectors provide unparal-leled sensitivity versus cost. In addition to their best-in-class performance statistics, Lumex’s new MicronSensIR family of infrared emitter and detector products are ideal for a wide range of applications.

Features: • Industry-leadingsensitivityof1.5E10Jonesacrossthe1to5.5microninfraredspectrum • Availableinoff-the-shelfandcustomizableformats • TheMicronSensIRfamilyofDetectorsofferssignificantopportunitiesforcostreductionanddesignsimplification reducing the need for multiple individual detectors and complex optics • MicronSensIREmittershigh-speedinfraredsourcecombinesahigh-performancepulsableemitterwith correspondingdriveelectronics.Designedtomaximizeoutputover1Hzto200Hzpulserates,thissource-driver combinationoptimizessystemsignaltonoiseperformancewhileminimizingtheoverallfootprint

Applications: Markets: • Gasanalysisanddetection •Medical • Greenhousegasmonitoring •Environmental • Fireandsparkdetection •Industrialsafety • Flamemonitoring •RailSafety • Emissionmonitoring •Automotive&Aviation • Processandqualitycontrol •Underground&TunnelSafety

Q U A L I T Y S E R V I C E I N N O V A T I O N

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02/28/2011

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MicronSensIR™ InfraredEmitters

LumexP/N:SNR-40636ProductSpecificationsMicronSensIR™ Infrared EmittersLumex’shigh-performanceMicronSensIRInfraredEmitters, combine a high-speed pulsable emitter with its corresponding drive electronicsonacompact14pincircuitboard.Designedtomaximizeoutputovera1Hzto200Hzrangeofpulsespeeds,these complementary assemblies enhance signal to noise performance, whileminimizingtheoverallsystemfootprint.

Theconstructionandimplementationoftheemitterandcontrolcircuitry,optimizeperformancebymatchingthedrivewaveform forthedesiredoperatingfrequency.Thisensurespeakoutputtem-peraturesatallpulsefrequenciesandpromotesthehighestoutputforanyapplication.Withtypicalpulsespeedsof180Hzand50%modulation depth, even trace elements in low parts per million con-centrations can be accurately detected.

TheMicronSensIRInfraredEmitterssub-systemisanidealsolutionforavarietyofapplications.Thecontrolcircuitrywillexploitthecapabilities of the high-speed source in any application, pulsed or steady state. With this emitter and controller set, designers can now focusonmaximizingtheoverallsystemperformanceratherthaninterfacingwiththesource.

Key Features: • Fastpulserates,upto180Hzwith50%modulation

depth • Adjustablepulserateswith0to5Vcontrolcircuitry • Highoutputemitter,.04watts/cm2atoneinchfrom

filament compact, reduced footprint solution • Softwaresupportofcustompulseconfigurations • Broadbandoutputwith88%emissivity • Loweroverallsystemcosts • Typ.MTTFof>26,000hrsatmaxratedpower

Applications: • Gasanalysis • Environmentalmonitoring • Spectrosopy • Processcontrolsystems • Plasticssorting

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MicronSensIR™ InfraredEmitters

LumexP/N:SNR-40636ProductSpecifications

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MicronSensIR PbS High Sensitivity Infrared Single Element DetectorsMicronSense™PbShigh-sensitivityinfrareddetectors(single-channeldetector)integraterecognizedPbStechnologywithproven manufacturing processes to provide the highest sensitivity detectors across the 1 to 3 micron spectrum. In addition,theseproductsminimizemaintenancecostandassuredependableoperationwithindustry-leadingreliability.

Availableinseveralconfigurations,customerscanchooseelementsize,coolingalternativesandpackagesizetosuitavarietyofsystemandapplicationrequirements.Cooledunitsprovideadditionalsensitivityforverylowlevelsignaldetectionand enhance stability for environments where temperatures are in constant flux.

MicronSensIR™ Infrared DetectorsLumex’s MicronSensIR Infrared PbSe and PbS detectors are available in single element and multi-element formats and provide industry-leadingsensitivityof1.5E10Jonesacrossthe1to5.5microninfraredspectrum.

In the detection and identification of gases and materials in the 1.0 to 5.5 µm infrared region, PbSe and PbS detectors provide unparal-leled sensitivity versus cost.

Key Features: • Highestsensitivitydetectorsoperatinginthe1-3

micron region. Provides high signal to noise perfor-mance for wide measurement dynamic range

• Highdurabilityensureslongoperationinthefield.Minimizesmaintenanceandrepair.

• Repeatableperformance,promoteshigh manufacturingyields.Consistentresultsfrombatch to batch

Applications: • Gasanalysis • Emissionsmonitoring • Spectroscopy • Processcontrolsystems • Thermalimaging • FlameMonitoringandDetection

SNR-40147 SNR-40013 SNR-40029

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MicronSensIR™ InfraredDetectors

LumexP/N:SNR-40013ProductSpecificationsMicronSensIR™ InfraredDetectors

LumexP/N:SNR-40147ProductSpecifications

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MicronSensIR™ InfraredDetectors

LumexP/N:SNR-40029ProductSpecificationsMicronSensIR PbSe Single Element Infrared DetectorsMicronSense™PbSeSingleElementInfraredDetectors(single-channeldetector)familyintegratesrecognizedPbSetechnologywithproven manufacturing processes to provide the highest sensitivity detectors across the one to five micron spectrum. In addition, MicronSense™PbSeSingleElementInfraredDetectorsproductsminimizemaintenancecostandassuredependableoperationwithindustry-leading reliability.

Thehighsensitivitymaximizesmeasurementdynamicrangeforapplicationswithtraceelements.Real-timemeasurementsareeasilysupportedwiththeMicronSense™PbSeSingleElementInfraredDetector’sfastresponsetime.Highdurabilityandlonglifeminimizerepair and maintenance costs.

Availableinseveralconfigurations,customerscanchooseelementsize,coolingalternativesandpackagesizetosuitavarietyofsystemandapplicationrequirements.Cooledunitsprovideadditionalsensitivityforverylowlevelsignaldetectionandenhancestabilityforenvironments where temperatures are in constant flux.

MicronSensIR™ Infrared Detectors

Key Features: • Highestsensitivitydetectorsoperatinginthe1-5

micron region. Provide high signal to noise perfor-mance for wide measurement dynamic range.

• Fastestresponsespeedformid-IRapplications

• Highreliabilityforlonglife

• Bestoverallperformanceforthe1-5micronspectrum

• Consistentrepeatableresultsminimizetesting

Applications: • Gasanalysis • Emissionsmonitoring • Spectroscopy • Processcontrolsystems • Thermalimaging • FlameMonitoringandDetection

SNR-40135 SNR-40059 SNR-40186

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MicronSensIR™ InfraredDetectors

LumexP/N:SNR-40135ProductSpecificationsMicronSensIR™ InfraredDetectors

LumexP/N:SNR-40059ProductSpecifications

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MicronSensIR™ InfraredDetectors

LumexP/N:SNR-40186ProductSpecificationsMicronSensIR High Performance Multi-Channel Infrared DetectorsNewapplicationdemandsaredrivinginstrumentmanufacturerstomeasuremoreelementsinsmallerdeviceswithoutsacrificingperformance.Tomeetthesechallenges,Lumex’sMicronSensIRHighPerformanceMulti-ChannelInfraredDetectorsproductfamilyprovidesfourdiscreteopticalchannelsinacompactTO-5package.Offeringlong-life,high-sensitivityPbSedetectors,MicronSensIRproducts cover the 1-5.5 micron spectrum for near- and mid-infrared applications.

Thesemulti-channeldetectorsaredesignedinaquadrantconfigura-tion.Fourisolatedopticalbandpassfiltersaremountedonfourdiscreteelements.Wellsuitedforavarietyofapplications,includingairqualitymonitoringandemissionsanalysis,thefiltershavepeakwavelengthsof4.62,4.60,and3.34micronstocoverforCO2,COandHCtestrequire-ments.

MicronSensIRHighPerformanceMulti-ChannelInfraredDetectorsprovides industry-leading sensitivity in the detection of up to four dis-tinctgasesinthe1.0to5.5µminfraredregion.Combiningthesuperiorsensitivity,highqualityandexceptionalreliabilityoftheMicronSensIR™products,thesedetectorsofferthefourchannelswithunmatchedchannelisolationandacompactTO-5footprint.Inaddition,theyprovideopticalfilteringCO,CO2andCH4(methane).Thefourthchannelistypicallyusedasanopticalreference(filteredat3.8um)tominimizemeasurementdegradation from obstacles in the optical path.

Key Features: • Fourdiscretehighsensitivityopticalchannelsallow

for simultaneous measurement of multiple materials including

-CO2,COandHCat4.62,4.60and3.34micronsrespectively

-Opticalreferenceat3.85microns • Covers1-5micronsfornear-andmid-IRapplications • Compact,TO5packagemaximizespotentialapplica-

tions -Idealforportableinstrumentswheresizeiscritical -Hermeticallysealedforuseinharshenvironments• Designedforreliabilitytopromotelonglifeinthefield

Applications: • Medicalgasanalysis • Industrialgasanalysis • Autoandaviationemissionsmonitoring • Airqualitymonitoringoranalysis -Environmental - In tunnels -Underground

MicronSensIR™ InfraredDetectors

LumexP/N:SNR-40642ProductSpecifications

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MicronSensIR Integrated Detector AssemblyLumex’sMicronSensIRIntegratedDetectorAssemblyincorporateselectronicswhilestillprovidingtheexceptionalsensitivityofthe2mmsquarePbSedetector(2.8xx1010cmHz1/2w-1peakD*)acrossthe1to5.5micronspectrum.Idealforportableinstruments,wheresize,durabilityandcostsaresoimportant,thiscompactdetectorprovidesa10dBgainamplifier,acoolerandathermistorallwithinahermeticallyshieldedpackage.Thisconfigurationhelpsminimizesystemnoise,optimizingthemeasurementdynamicrange,while reducing the system footprint and costs.

Standingoutfromothersingle-elementdetectors,MicronSensIRIntegratedDetec-torAssemblywascreatedtominimizesizeandsimplifysystemimplementation,withoutsacrificingperformance.ThestandardMicronSensIRIntegratedDetectorAssemblyincludesa2x2mmPbSedetectorandsupportssingleorbipolarbiassup-plies.ItisconfiguredwithanACcoupled10dBgainamplifier.

Thecompactsizesignificantlyreducesthefootprintascomparedtotraditionaldetector schemes and provides a hermetically sealed assembly for harsh environ-ments.MicronSensIRIntegratedDetectorAssemblyisidealformanufacturersofportableequipmentwheresize,durabilityandcostsaresoimportant.

TheMicronSensIRIntegratedDetectorAssemblydesigntakesadvantageofashielded,highimpedancedetectornodetominimizenoise.Withtheintegratedthermistorandthermoelectriccooler(TEC),MicronSenseIRIntegratedDetector

Assemblycanmanagetemperaturefluctuationsreliably.Thesecomplementaryfeaturescombinetooptimizethesignaltonoiseratio.ThusLumex’sMicronSensIRIntegratedDetectorAssemblyispreparedtomeetthechallengesoftoday’sandtomorrow’sdemandingapplications.

Key Features: • Highsensitivitydetectorwithintegratedelectronics

including: -SinglestageTECandthermistorfortemperature

control -Hermeticsealingforuseinharshenvironments -AcompactTO-8package • Idealforportableinstrumentswheresmallsizeiscriti-

cal • Lesssusceptibletonoisethanexternalcircuitrycon-

figurations • ExternalinterfacerequiredtocontrolTEC

Applications: • Gasanalysis,medicalandindustrial • Emissionsmonitoring • Spectroscopy • Processcontrolsystems • Thermalimaging • Flamedetection

MicronSensIR™ InfraredDetectors

LumexP/N:SNR-40633ProductSpecifications

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MicronSensIR Integrated Detector Assembly - Operating InstructionsTheMicronSensIRIntegratedDetectorAssemblyconsistsofaPbSe2x2mmdetectorwithanintegratedlow-noise10gainbuffer/ampli-fier,thermistor,andThermoelectricCooler(TEC).TheThermoelectricCooleristypicallyconfiguredwithatemperaturecontrolcircuitusingthethermistortoprovidefeedbacktothecontroller.Additionally,alownoisevoltagesourceisrequiredalongwithameasuringinstrument,suchasawaveanalyzerorA/Dconverterandasoftwarepackage,suchasLabview.Amodulatedor“chopped”infraredsourcebetween50-500HzisneededtoobtainVooutputbetween0-1000μVAC.Itisimportanttofollowtheguidelinesprovidedinthisdocument to achieve the optimal performance.

TypicalSystemDiagram

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Measuring Instrument

Thesignaloutputwillvarydependingontheapplication.Atypicalsignalwillbeintherangeof10-1000μV.Thesignalvalues(inμV)reportedonthetestdatasheetarevaluesobtainedbyconnectingawaveanalyzerdirectlytotheoutputoftheIDAwithoutfurthersignal conditioning or amplification.

Modulated Infrared Source:

Onecanchoosefromawidevarietyofinfraredsources.ThetworequirementsfortheMicronSensIRIntegratedDetectorAssemblyare:1.Thesourceshouldbemodulatedatafrequencybetweenthelower3dBrolloffpoints,between10Hzand825Hz.2.Theincidentradiationshouldbewithinthedynamicrangeofthedetector.Thelinearresponserangeforincidentradiationis10-6watts/cm2-10-3watts/cm2.

Ground Loops:

Specialattentioninconnectingthisandcertainothersensorsshouldbepaidwhendetermininghowtoconnectthegrounds.Theyshould be constructed so that all grounds have a single path to earth.

RequirementsOverview

Bias VoltageAbiassupply(+Vb,-Vb)isneededtooperatetheMicronSensIRIntegratedDetectorAssembly.ThesupplyneedstobefreeofACcomponentsthatcouldpassthroughtheamplifierasnoise.Thebestchoiceforabiassupply(withcurrent>10μA)is50VDC.Othervoltagescanbeused,suchas25V,butitwilldecreasetheresultingperformance.

TEC ControllerThemaximumcurrentforthecooleris1.3Aat2.4-3VDC.Thethermistortemperaturecanbedeterminedusingthethermistorcurvebelow.Duringthemanufacturingprocess,theMicronSensIRIntegratedDetectorAssemblyistestedat0°C.However,theunitcanbeoperatedatothertemperaturesaslowas-20°Cwhencooledfrom23°C.

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InstallingCooledDetectorAssembly

Thermoelectriccoolersareoftenusedtocooldevicesforincreasedsensitivityorstability.Packagesinvolvingtheuseofthermoelectriccoolersrequiresomecarefulconsiderationtoinsuremaximumlifeandperformance.

AThermoelectricCoolerusesthePeltiereffecttoconvertDCcurrentintoadifferentialtemperature(ΔT)andissometimesreferredtoasaSolidStateHeatPump.Asthenameimplies,thedevice“pumps”heatfromoneplacetoanother.Heat(Q)istypicallypumpedfromtheobjectthatisbeingcooledtotheatmosphere.Itisveryimportantthatthethermalresistanceinthispathbelowenoughtodissipateboth the heat being pumped and the heat generated by the cooler itself. If it is not, the cooler and the device will overheat, damaging both components.

Whendesigningandusingathermoelectricallycooledpackage,someimportantitemstoconsideraretheheatsinkselection,themounting method, and the current limit of the control electronics.1.HeatSinkSelectionAproperheatsinkmustbeused.Heatcanbegeneratedbythedevicebeingcooledandalsobythethermoelectriccooleritself,totalingseveralwatts.Theselectedheatsinkmustbeadequatetodissipatealloftheheatbeinggeneratedandpumpedbythecooler.Theheatsinkrepresentsthefinalthermalresistancetotheatmosphere,soitsdesigniscriticaltotheperformanceandlongevityofthedevice.Inadequateheatsinkdesign,mountingorsizewillreducedetectorperformanceandcouldleadtoearlyfailureofthedeviceandcooler.

2.MountingAsshownbelow,theoptimalthermalpathisoutofthepinsideofthepackage.

Thepackagematerialisdesignedtoprovideahermeticseal,notnecessarilylowthermalresistance.Sincethegoalofheatsinkingistominimizethethermalresistanceinthethermalpath,itisimportantthatitbemounteddirectlytothesideofthepackagewherethepinsprotrude.Mountingtoanyothersurfaceonthepackageincreasesthethermalresistance,compromisesthermalperformanceandreduces reliability.

Toreducethethermalresistanceattheheatsink/packagethermalinterface,themountingsurfacesmustbeflatandfreeofanyburrsorprotrusionsonany“casting”surface.Reducingthethermalresistanceatthisinterfaceisaidedbytheuseofthermallyconductiveinter-facematerialsbetweenthebackofthepackageandtheheatsink.ThermalcompoundsareprovidedbycompaniessuchasWakefieldEngineering.Tomaintainaconsistentthermalpathbeyondfive(5)years,athermalpadmustbeusedinplaceofthethermalcom-pound.ThiswillincreasethethermalresistanceandtherebyreducethecoolerdeltaTbyasmuchasten(10)percentbutcanincreasethedevicelifetimeifproperlyassembledandtightenedwheninstalledintotheheatsinkassembly.Theassemblyandtorquearealwaysvery critical, but even more so when using a thermal pad in place of the compound.

Theconnectingpinsorleadsthatprotrudefromthebackofthepackagearehermeticallysealedwithaglass-filledfeedthrough.Com-pletetheassemblyoftheheatsink,includingthefinaltorqueofthemountingscrews,priortosolderingthesepinsintoplace.Failuretomounttheheatsinkbeforesolderingthepinscanputstressontheglassjointastheheatsinkistightenedandcanleadtoahermeticsealfailure.Hermeticsealfailurecancausedevicefailure.

Avoidbendingthepins.Iftheymustbebent,useapairofbendingpliersortweezerstoisolatethebendareafromtheglass-filledseal.Multiple bends of these pins will lead to pin failure.

3.ControlElectronicsExternalelectronicsareresponsibleforcontrollingthetemperatureandprotectingthepackagefromoverheating.ΔTincreaseswithincreasing current (I) up to the point that the internal heating is greater than the heat pumping capacity. Increasing the current beyond thatpointwillheatthedevice,possiblytodestruction.Thethermistorshouldbeusedtoprovidefeedbacktocontroller/powersup-plycircuitry,whichregulatestheinputpowerandmaintainstheappropriatesetpointtemperature.AcurrentlimitmustbesetonthecoolerpowersupplywhichislessthanImaxandalsopreventsoverheatingforthecoolerinuse.Notethatthepointatwhichacooleroverheats depends directly on the thermal resistance to the atmosphere and the ambient temperature.

TheTECcanberuninopen-loopmodewithafixedvoltage.Thiswillincreasethesensitivityandspectralresponseofthedetectorbutdoes not reduce temperature-induced sensitivity fluctuations.

4.SummaryTheperformanceofdetectorpackageswiththermoelectriccoolersisdirectlyrelatedtotheadequateheatsinkingofthepackage.Thermalresistanceisminimizedbyproperheatsinkselectionandmountingusingathermalinterfacematerial.Overallcontrolandprotection is the responsibility of the system cooler control electronics. Proper thermal and electronic design will prevent damage and optimizetheperformanceofthedetector.

Failuretouseproperhandling,heatsinking,thermalpath,mountingmethods,and/orpowerlimitswillvoidanyexpressedorimpliedwarranty by Lumex.