National Semiconductor | High-performance Analog

 

 LMH6514   

600 MHz, Digital Controlled, Variable Gain Amplifier from the PowerWise® Family
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Features

  • Adjustable gain with a 42 dB range
  • Precise 6.02 dB gain steps
  • Parallel 3 bit gain control
  • On chip register gain setting
  • Fully differential signal path
  • Single ended to differential capable
  • 200Ω input impedance
  • Small footprint (4 mm x 4 mm) LLP package
  • Description

    The LMH6514 is a high performance, digitally controlled variable gain amplifier (DVGA). It combines precision gain control with a low noise, ultra-linear, differential amplifier. Typically, the LMH6514 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range. When used in conjunction with a high speed ADC, system dynamic range can be extended by up to 42 dB.

    The LMH6514 has a differential input and output allowing large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance is either 200Ω or 400Ω and is user selectable. A unique internal architecture allows use with both single ended and differential input signals.

    Input signals to the LMH6514 are scaled by a highly linear, digitally controlled attenuator with seven accurate 6 dB steps. The attenuator output provides the input signal for a high gain, ultra linear differential transconductor. The transconductor differential output current can be converted into a voltage by using the on-chip 200Ω or 400Ω loads. The transconductance gain is 0.1 Amp/Volt resulting in a maximum voltage gain of +32 dB when driving a 200Ω load, or 38 dB when driving the 400Ω load. On chip digital latches are provided for local storage of the gain setting. The gain step settling time is 5 ns and care has been taken to reduce the sensitivity of bandwidth and phase to gain setting.

    The LMH6514 operates over the industrial temperature range of −40°C to +85°C. The LMH6514 is available in a 16-Pin, thermally enhanced, LLP package.

    Key Specification

  • 600 MHz bandwidth at 100Ω load
  • 39 dBm OIP3 at 75 MHz, 200Ω load
  • 26 dB to 38 dB maximum gain
  • Selectable output impedance of 200Ω or 400Ω.
  • 8.3 dB noise figure
  • 5 ns gain step switching time
  • 100 mA supply current

  • Applications

  • Cellular base stations
  • IF sampling receivers
  • Instrumentation
  • Modems
  • Imaging
  • Differential line receiver
  • Also Recommended
    ADC14155Complimentary ADC With 14-bit Performance
    LM97593Complimentary Dual 12-bit/ 65Msps ADC + DDC (Diversity Receiver Chipset)
    LMH6515Similar DVGA With 1dB Gain Steps And 31dB Gain Adjust Range
    CLC5903Digital Down Converter (Diversity Receiver Chipset)


    Typical Application

    Parameters / ValuesLMH6514 LMH6515
    Gain Adjust Range42 dB 31 dB
    Signal Channel BW600 MHz 600 MHz
    Supply Min4 Volt 4 Volt
    Supply Max5 Volt 5 Volt
    Gain Control InterfaceParallel TTL/CMOS Parallel TTL/CMOS
    Supply Current107 mA 100 mA
    PowerWise Rating 2167 uA/MHz 167 uA/MHz
    Output Current20 mA 20 mA
    Offset Voltage max, 25C30 mV 30 mV
    Voltage Noise1.8 nV/root(Hz) 1.8 nV/root(Hz)
    HD 2nd-82 dB -80 dB
    HD 3rd-70 dB -60 dB
    Special Features6db Steps, Differential I/O 1db Steps, Differential I/O
    FunctionVGA VGA
    Temperature Min-40 deg C -40 deg C
    Temperature Max85 deg C 85 deg C
    PowerWiseYes Yes

    Datasheets
    TitleSizeDateOther
    Language
    LMH6514 600 MHz, Digital Controlled, Variable Gain Amplifier529
    Kbytes
    24-Jan-08   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1828: Application Note 1828 LMH6514 Digital Controlled Variable Gain Amplifier Evaluation Board2238
    Kbytes
    8-Apr-08 

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMH6514SQ/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $4.50 each at 1K+ pcsreel
    of
    1000
    LMH6514SQE/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide451
    FARNELLEurope and Asia118
    MOUSERWorldwide236
    RS COMPONENTSWorldwide15
    $4.50 each at 1K+ pcsreel
    of
    250
    LMH6514SQX/NOPB


    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $4.50 each at 1K+ pcsreel
    of
    4500

    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 LMH6514.

    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 LMH6514 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LMH6514SQEVAL
    Evaluation Kit for the LMH6514Full production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $340.00 each1

    Description:

    The LMH6514 evaluation board (part # LMH6514SQEVAL) is designed to aid in the characterization of National Semiconductors High Speed LMH6514 Digital Controlled Variable Gain Amplifier (DVGA). Use the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and characterization.

    Contents:

    • LMH6514 Evaluation Board
    • LMH6514 600 MHz, Digital Controlled, Variable Gain Amplifier Datasheet
    • Application Note 1828 Digital Controlled Variable Gain Amplifier Evaluation Board



      National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

      Lead Free product status is available through the search tool located here

      Part Number(s)
      (NSID)
      Weight
      (milligrams)
      TypePinsMSL RatingPeak ReflowRoHS
      Status
      CAD SymbolsModelsPackage
      Marking
      Format
      LMH6514SQ/NOPB

      39.461
      LLP163260DetailDownloadN/A
      NS
      UZXYTT
      L6514SQ
      LMH6514SQE/NOPB

      39.461
      LLP163260DetailDownloadN/A
      NS
      UZXYTT
      L6514SQ
      LMH6514SQX/NOPB

      39.461
      LLP163260DetailDownloadN/A
      NS
      UZXYTT
      L6514SQ

      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 LMH6514.

      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 LMH6514 is located at RoHS Status.

      CAD Symbols and Models
      Download LMH6514 CAD Symbols
       Models
      N/A


      Reliability Metrics
      Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
      LMH6514SQBICMOS8B+036320027622922783807897
      LMH6514SQEBICMOS8B+036320027622922783807897
      LMH6514SQXBICMOS8B+036320027622922783807897

      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 LMH6514.

      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 LMH6514 is located at RoHS Status.

      [Information as of 9-Feb-2012]