THERMOPILE OTP-537F4 Introduction TheOTP-537F4isathermopilesensorinclassicTO-5housing.Thesensoriscomposedof116elementsofthermocoupleinseriesonafloatingmicro-membranehavinganactivediameterof545 m and with blacken surface to absorb the incident thermal infrared radiation, which induces avoltageresponseatoutputterminals. Thesensorchipisfabricatedbyauniquefront-surfacebulkmicromachining technology, which result in smaller size and faster to response ambienttemperaturechange. TheIRwindowisabandpassfilterhavingcut-onwavelengthat8 m,andcut-downat14 m. ThesensorresponsesproportionallytotheincidentIRradiationandhasaconstantsignalresponseupto its cut-off frequency, which is limited by the sensor thermal time constant of tens millisecondrange. TheOTP-537F4thermopilesensorprovidesnearlyJohnson-noise-limitedperformance,whichcanbe calculated by its ohmic series resistance.A thermistor element, with a lead connected toground,isalsoprovidedinsidetheTOpackageforambienttemperaturereference. Features z Non-contacttemperaturedetectionz Voltageoutput,easytotakesignalz Zeropowerconsumptionz Widedetectiontemperaturerange Applications z MedicalApplication: Earthermometers z HomeFacility: Microwaveoven,Hairdryer,Safetysystem,Homesecurity Airconditioner z IndustryApplication: Processmonitorandcontroller,Infrarednon-contactthermometers z AutomobileApplication: Thermalsensingsystem TableofContents 1GeneralCharacteristics 1.1 AbsoluteMaximumRatings 1.2HandlingGuidelines 2DeviceCharacteristics 2.1 DeviceDescriptions 2.2 SensorCharacteristics 2.3 SignalOutputCharacteristics 2.4 FrequencyResponse 2.5 ThermistorCharacteristics 2.6 OpticalCharacteristics 2.7 FilterCharacteristics 2.8 MechanicDrawingandPinAssignment 3LiabilityStatement ListofFigures Figure1:Typicaloutputvoltageversusobjecttemperaturewithsensorat25 CFigure2:FrequencyresponseFigure3:Fieldofviewcurve Figure4:Typicalspectraltransmittancecurve Figure5:Mechanicaldrawingandpinassignment ListofTables Table1:Absolutemaximumratings Table2:Devicecharacteristics Table3:Thermopilesensorcharacteristics Table4:TypicalnumericaldataofThermopile soutputvoltage(sensorat25 C)Table5:ThermistorinformationTable6:TabulatedthermistordataTable7:OpticalcharacteristicsTable8:Filterparameters