National Semiconductor | High-performance Analog

 

 LM285-ADJ   
Adjustable Micropower Voltage Reference 		Click link to Download

Features

  • Adjustable from 1.24V to 5.30V
  • Operating current of 10μA to 20mA
  • 1% and 2% initial tolerance
  • 1Ω dynamic impedance
  • Low temperature coefficient

    • Description

    The LM185/LM285/LM385 are micropower 3-terminal adjustable band-gap voltage reference diodes. Operating from 1.24 to 5.3V and over a 10μA to 20mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM185 band-gap reference uses only transistors and resistors, low noise and good long-term stability result.

    Careful design of the LM185 has made the device tolerant of capacitive loading, making it easy to use in almost any reference application. The wide dynamic operating range allows its use with widely varying supplies with excellent regulation.

    The extremely low power drain of the LM185 makes it useful for micropower circuitry. This voltage reference can be used to make portable meters, regulators or general purpose analog circuitry with battery life approaching shelf life. Further, the wide operating current allows it to replace older references with a tighter tolerance part.

    The LM185 is rated for operation over a −55°C to 125°C temperature range, while the LM285 is rated −40°C to 85°C and the LM385 0°C to 70°C. The LM185 is available in a hermetic TO-46 package and a leadless chip carrier package, while the LM285/LM385 are available in a low-cost TO-92 molded package, as well as S.O.




    Typical Application
    *click for larger image


    		Block Diagram
    *click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Initial Accuracy (+/-) Max 2 %
    Reference Voltage Adjustable
    Tempco, max (ppm/C) 150 ppm
    Operating Current 0.01 mA
    Output Current 20 mA
    Reference with respect to Cathode (high side)
    Temperature Min -40 deg C
    Temperature Max 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM285-ADJ Adjustable Micropower Voltage Reference724
    Kbytes    		30-Jan-08日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM285BXZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    ARROWWorldwide401
    AVNET-EMWorldwide729
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia362
    MOUSERWorldwide1792
    NEWARKAmericas187
    TAYLORAmericas2431
    		$1.02 each at 1K+ pcsbox
    of
    1800
    LM285BYM/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide408
    AVNET-EMWorldwide155
    DIGI-KEYWorldwide407
    MOUSERWorldwide464
    TAYLORAmericas408
    		$0.96 each at 1K+ pcsrail
    of
    95
    LM285BYMX/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.96 each at 1K+ pcsreel
    of
    2500
    LM285BYZ/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide530
    DIGI-KEYWorldwide0
    MOUSERWorldwide1775
    		$0.82 each at 1K+ pcsbox
    of
    1800
    LM285M/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide2246
    AVNET-EMWorldwide676
    DIGI-KEYWorldwide2336
    FARNELLEurope and Asia165
    MOUSERWorldwide1010
    NEWARKAmericas706
    RS COMPONENTSWorldwide30
    TAYLORAmericas4107
    		$0.37 each at 1K+ pcsrail
    of
    95
    LM285MX/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide7500
    MOUSERWorldwide2300
    		$0.37 each at 1K+ pcsreel
    of
    2500
    LM285Z/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2135
    AVNET-EMWorldwide2625
    DIGI-KEYWorldwide0
    MOUSERWorldwide1310
    TAYLORAmericas2135
    		$0.34 each at 1K+ pcsbox
    of
    1800

    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 LM285-ADJ.

    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 LM285-ADJ is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM285BXZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    LM285
    BXZ
    LM285BYM/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    BYM
    LM285BYMX/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    BYM
    LM285BYZ/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    LM285
    BYZ
    LM285M/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    M
    LM285MX/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    M
    LM285Z/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    LM285
    Z

    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 LM285-ADJ.

    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 LM285-ADJ is located at RoHS Status.

    CAD Symbols and Models
    N/A
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM285BXZSLM04404600353250011002356520
    LM285BYMSLM04404600353250011002356520
    LM285BYMXSLM04404600353250011002356520
    LM285BYZSLM04404600353250011002356520
    LM285MSLM04404600353250011002356520
    LM285MXSLM04404600353250011002356520
    LM285ZSLM04404600353250011002356520

    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 LM285-ADJ.

    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 LM285-ADJ is located at RoHS Status.

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation