National Semiconductor | High-performance Analog

 

 LM34   
Precision Fahrenheit Temperature Sensor 		Click link to Download

Features
  • Calibrated directly in degrees Fahrenheit
  • Linear +10.0 mV/°F scale factor
  • 1.0°F accuracy guaranteed (at +77°F)
  • Rated for full -50° to +300°F range
  • Suitable for remote applications
  • Low cost due to wafer-level trimming
  • Operates from 5 to 30 volts
  • Less than 90 µA current drain
  • Low self-heating, 0.18°F in still air
  • Nonlinearity only ±0.5°F typical
  • Low-impedance output, 0.4Ohm for 1 mA load

    • Description

    The LM34 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 thus has an advantage over linear temperature sensors calibrated in degrees Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Fahrenheit scaling. The LM34 does not require any external calibration or trimming to provide typical accuracies of ±½°F at room temperature and ±1½°F over a full -50 to +300°F temperature range. Low cost is assured by trimming and calibration at the wafer level. The LM34's low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy. It can be used with single power supplies or with plus and minus supplies. As it draws only 75 µA from its supply, it has very low self-heating, less than 0.2°F in still air. The LM34 is rated to operate over a -50° to +300°F temperature range, while the LM34C is rated for a -40° to +230°F range (0°F with improved accuracy). The LM34 series is available packaged in hermetic TO-46 transistor packages, while the LM34C, LM34CA and LM34D are also available in the plastic TO-92 transistor package. The LM34D is also available in an 8-lead surface mount small outline package. The LM34 is a complement to the LM35 (Centigrade) temperature sensor.

    Also Recommended
    LM94021▲1.5V Supply, Celsius,4 Selectable Gains
    LM94022▲1.5V Supply, Celsius,4 Selectable Gains



    Typical Application
    *click for larger image



    Typical Performance
    *click for larger image


    Parameters / ValuesLM34 LM94021 LM94022
    Temperature Accuracy (+/-)1.11, 0.556 deg C 1.5 deg C 1.5 deg C
    Supply Min5 Volt 1.5 Volt 1.5 Volt
    Quiescent Current_75 uA 9 uA 5.4 uA
    Temperature Min-45.5555, -40, 0 deg C -50 deg C -50 deg C
    Temperature Max148.889008, 100, 110 deg C 150 deg C 150 deg C
    Sensor Gain10 mV/Deg F -5.5 to -13.6 mV/degC -5.5 to -13.6 mV/degC
    Supply Max30 Volt 5.5 Volt 5.5 Volt
    Single SupplyNo Yes Yes
    Output Impedance0.4 Ohm 8 Ohm 5.2 Ohm
    Quiescent Current0.075 mA 0.012 mA 0.0081 mA

    Datasheets
    TitleSizeDateOther
    Language
    LM34 Precision Fahrenheit Temperature Sensor251
    Kbytes    		30-Nov-00日本語  


    Application Notes
    TitleSizeDateOther
    Language
    AN-460: Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors306
    Kbytes    		20-Sep-02日本語


    Other Technical Documents
    TitleTypeDate
    Temperature Sensors HandbookApp Note 2003-03-13

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM34CAZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide7955
    AVNET-EMWorldwide5598
    DIGI-KEYWorldwide3292
    FARNELLEurope and Asia858
    MOUSERWorldwide1733
    NEWARKAmericas958
    TAYLORAmericas7955
    		$4.00 each at 1K+ pcsbox
    of
    1800
    LM34CZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide14
    DIGI-KEYWorldwide484
    FARNELLEurope and Asia1216
    MOUSERWorldwide1411
    NEWARKAmericas1216
    TAYLORAmericas14
    		$3.10 each at 1K+ pcsbox
    of
    1800
    LM34DM/NOPB

    LM34DM

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide15
    AVNET-EMWorldwide151
    DIGI-KEYWorldwide1202
    FARNELLEurope and Asia76
    MOUSERWorldwide228
    NEWARKAmericas76
    TAYLORAmericas330
    		$0.92 each at 1K+ pcsrail
    of
    95
    LM34DMX/NOPB

    LM34DMX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide7500
    AVNET-EMWorldwide830
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    TAYLORAmericas5000
    		$0.92 each at 1K+ pcsreel
    of
    2500
    LM34DZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide183
    AVNET-EMWorldwide7515
    DIGI-KEYWorldwide5907
    FARNELLEurope and Asia1638
    MOUSERWorldwide1314
    NEWARKAmericas877
    TAYLORAmericas8314
    		$0.95 each at 1K+ pcsbox
    of
    1800
    LM34AH/NOPB

    LM34AH

    RoHS Status

    TO-46    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    ARROWWorldwide126
    DIGI-KEYWorldwide1008
    TAYLORAmericas326
    		$9.90 each at 1K+ pcsbox
    of
    1000
    LM34CAH/NOPB

    LM34CAH

    RoHS Status

    TO-46    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    ARROWWorldwide380
    AVNET-EMWorldwide1
    DIGI-KEYWorldwide2011
    TAYLORAmericas380
    		$8.25 each at 1K+ pcsbox
    of
    1000
    LM34DH/NOPB

    LM34DH

    RoHS Status

    TO-46    		Full production
    Lead Time: 8 weeks

     
    DistributorRegionQty
    ARROWWorldwide648
    AVNET-EMWorldwide87
    DIGI-KEYWorldwide0
    TAYLORAmericas648
    		$5.17 each at 1K+ pcsbox
    of
    1000

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM34CH
    		LM34CAH
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM34.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM34 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM34CAZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM34
    CAZ
    LM34CZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM34
    CZ
    LM34DM/NOPB

    LM34DM
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM34D
    M
    LM34DMX/NOPB

    LM34DMX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    LM34D
    M
    LM34DZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailDownloadN/A
    		NSXYTT
    LM34
    DZ
    LM34AH/NOPB

    LM34AH
    		279.309
    279.699
    		TO-4631
    1    		NA
    NA    		DetailDownloadN/A
    		NSXYTTE# LM34AH
    LM34CAH/NOPB

    LM34CAH
    		279.309
    279.699
    		TO-4631
    1    		NA
    NA    		DetailDownloadN/A
    		NSXYTTE# LM34CAH
    LM34DH/NOPB

    LM34DH
    		279.309
    279.699
    		TO-4631
    1    		NA
    NA    		DetailDownloadN/A
    		NSXYTTE# LM34DH

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM34.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM34 is located at RoHS Status.

    CAD Symbols and Models
    Download LM34 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM34CAZSLM04404600353250011002356520
    LM34CZSLM04404600353250011002356520
    LM34DMSLM04404600353250011002356520
    LM34DMXSLM04404600353250011002356520
    LM34DZSLM04404600353250011002356520

    Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

    For more information on Reliability Metrics, please click here.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM34.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM34 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM34CH
    		LM34CAH
    		NATIONAL SEMICONDUCTOR
    		01 Dec 2009

    What's All This Signal Current Stuff, Anyhow?
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    What's All This Signal Current Stuff, Anyhow?
    Date: 2004-09-28
    Length: 00:49:32
    [Information as of 3-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation