National Semiconductor | High-performance Analog

 

 LM285-2.5   
Micropower Voltage Reference Diode 		Click link to Download

Features

  • ±20 mV (±0.8%) max. initial tolerance (A grade)
  • Operating current of 20 μA to 20 mA
  • 0.6Ω dynamic impedance (A grade)
  • Low temperature coefficient
  • Low voltage reference—2.5V
  • 1.2V device and adjustable device also available—LM185-1.2 series and LM185 series, respectively

    • Description

    The LM185-2.5/LM285-2.5/LM385-2.5 are micropower 2-terminal band-gap voltage regulator diodes. Operating over a 20 μA to 20 mA current range, they feature exceptionally low dynamic impedance and good temperature stability. On-chip trimming is used to provide tight voltage tolerance. Since the LM-185-2.5 band-gap reference uses only transistors and resistors, low noise and good long term stability result.

    Careful design of the LM185-2.5 has made the device exceptionally 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 LM185-2.5 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. For applications requiring 1.2V see LM185-1.2.

    The LM185-2.5 is rated for operation over a −55°C to 125°C temperature range while the LM285-2.5 is rated −40°C to 85°C and the LM385-2.5 0°C to 70°C. The LM185-2.5/LM285-2.5 are available in a hermetic TO-46 package and the LM285-2.5/LM385-2.5 are also available in a low-cost TO-92 molded package, as well as S.O. and SOT-23. The LM185-2.5 is also available in a hermetic leadless chip carrier package.

    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Initial Accuracy (+/-) Max 1.5 %
    Reference Voltage 2.5 V
    Tempco, max (ppm/C) 30, 50, 150 ppm
    Operating Current 0.02 mA
    Output Current 20 mA
    Temperature Min -40 deg C
    Temperature Max 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM285-2.5 Micropower Voltage Reference Diode334
    Kbytes    		30-Jan-08日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM285BXM-2.5/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide241
    AVNET-EMWorldwide159
    DIGI-KEYWorldwide0
    MOUSERWorldwide130
    TAYLORAmericas241
    		$0.99 each at 1K+ pcsrail
    of
    95
    LM285BXMX-2.5/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide2500
    		$0.99 each at 1K+ pcsreel
    of
    2500
    LM285BXZ-2.5/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 16 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide910
    DIGI-KEYWorldwide0
    MOUSERWorldwide1780
    		$0.96 each at 1K+ pcsbox
    of
    1800
    LM285BYM-2.5/NOPB

    LM285BYM-2.5

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide600
    DIGI-KEYWorldwide0
    MOUSERWorldwide475
    		$0.80 each at 1K+ pcsrail
    of
    95
    LM285BYMX-2.5/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.80 each at 1K+ pcsreel
    of
    2500
    LM285BYZ-2.5/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide115
    AVNET-EMWorldwide1996
    DIGI-KEYWorldwide849
    MOUSERWorldwide1800
    NEWARKAmericas1774
    TAYLORAmericas1420
    		$0.78 each at 1K+ pcsbox
    of
    1800
    LM285M-2.5/NOPB


    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide633
    AVNET-EMWorldwide1858
    DIGI-KEYWorldwide535
    MOUSERWorldwide1019
    NEWARKAmericas4410
    RS COMPONENTSWorldwide10
    TAYLORAmericas1255
    		$0.29 each at 1K+ pcsrail
    of
    95
    LM285MX-2.5/NOPB

    LM285MX-2.5

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide7152
    AVNET-EMWorldwide2500
    DIGI-KEYWorldwide3601
    MOUSERWorldwide2489
    RSL MICROAsia Pacific10000
    TAYLORAmericas18486
    		$0.29 each at 1K+ pcsreel
    of
    2500
    LM285Z-2.5/NOPB


    RoHS Status

    TO-92    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide1547
    AVNET-EMWorldwide2301
    DIGI-KEYWorldwide2339
    MOUSERWorldwide1771
    NEWARKAmericas1093
    TAYLORAmericas2380
    		$0.29 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 LM285-2.5.

    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 LM285-2.5 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM285BXM-2.5/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    285BX
    M2.5
    LM285BXMX-2.5/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    285BX
    M2.5
    LM285BXZ-2.5/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    285BX
    Z2.5
    LM285BYM-2.5/NOPB

    LM285BYM-2.5
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailN/AN/A
    		NSZXTT
    285BY
    M2.5
    LM285BYMX-2.5/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    285BY
    M2.5
    LM285BYZ-2.5/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    285BY
    Z2.5
    LM285M-2.5/NOPB

    		69.761
    70.001
    		SOIC NARROW81260DetailN/AN/A
    		NSZXTT
    LM285
    M2.5
    LM285MX-2.5/NOPB

    LM285MX-2.5
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailN/AN/A
    		NSZXTT
    LM285
    M2.5
    LM285Z-2.5/NOPB

    		201.662
    202.003
    		TO-9231NADetailN/AN/A
    		NSXYTT
    LM285
    Z-2.5

    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 LM285-2.5.

    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 LM285-2.5 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)
    LM285BXM-2.5SLM04404600353250011002356520
    LM285BXMX-2.5SLM04404600353250011002356520
    LM285BXZ-2.5SLM04404600353250011002356520
    LM285BYM-2.5SLM04404600353250011002356520
    LM285BYMX-2.5SLM04404600353250011002356520
    LM285BYZ-2.5SLM04404600353250011002356520
    LM285M-2.5SLM04404600353250011002356520
    LM285MX-2.5SLM04404600353250011002356520
    LM285Z-2.5SLM04404600353250011002356520

    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 LM285-2.5.

    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 LM285-2.5 is located at RoHS Status.

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