National Semiconductor | High-performance Analog

 

 LME49721   

High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier
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Features

  • Rail-to-rail Input and Output
  • Easily drives 10kΩ loads to within 10mV of each power supply voltage
  • Optimized for superior audio signal fidelity
  • Output short circuit protection
  • Description

    The LME49721 is a low distortion, low noise Rail-to-Rail Input/Output operational amplifier optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state-of-the-art circuit design, the LME49721 Rail-to-Rail Input/Output operational amplifier delivers superior signal amplification for outstanding performance. The LME49721 combines a very high slew rate with low THD+N to easily satisfy demanding applications. To ensure that the most challenging loads are driven without compromise, the LME49721 has a high slew rate of ±8.5V/μs and an output current capability of ±9.7mA. Further, dynamic range is maximized by an output stage that drives 10kΩ loads to within 10mV of either power supply voltage.

    The LME49721 has a wide supply range of 2.2V to 5.5V. Over this supply range the LME49721’s input circuitry maintains excellent common-mode and power supply rejection, as well as maintaining its low input bias current. The LME49721 is unity gain stable.

    Key Specification
    Power Supply Voltage Range 2.2V to 5.5V
    Quiescent Current 2.15mA (typ)
    THD+N (AV = 2, VOUT = 4Vp-p, f IN = 1kHz)  
      RL = 2kΩ 0.00008% (typ)
      RL = 600Ω 0.0001% (typ)
    Input Noise Density 4nV/ ^Hz (typ), @ 1kHz
    Slew Rate ±8.5V/μs (typ)
    Gain Bandwidth Product 20MHz (typ)
    Open Loop Gain (RL = 600Ω) 118dB (typ)
    Input Bias Current 40fA (typ)
    Input Offset Voltage 0.3mV (typ)
    PSRR 103dB (typ)


    Applications

  • Ultra high quality portable audio amplification
  • High fidelity preamplifiers
  • High fidelity multimedia
  • State of the art phono pre amps
  • High performance professional audio
  • High fidelity equalization and crossover networks
  • High performance line drivers
  • High performance line receivers
  • High fidelity active filters
  • DAC I–V converter
  • ADC front-end signal conditioning



  • Typical Application
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    Typical Performance
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    ParametersValues
    THD .0002 %
    PSRR 103 dB
    Supply Min 2.2 Volt
    Single/Dual/Quad Dual
    Special Features Rail to rail
    THD Conditions Av=+1, Vout=2Vpp, Rl=2kohm, Rl=600ohm
    User Supply 5 Volt
    Supply Current per Amplifier 2.15 mA
    Supply Max 5.5 Volt
    Shut down No
    Voltage Noise 4 nV/root(Hz)
    Supply Range +2.2 - +5.5 V
    Max Input Bias Current 0.00004 nA
    Output Current 9.7 mA
    Offset Voltage, typ 0.3 mV
    Gain Bandwidth 20 MHz
    Slew Rate 8.5 Volts/usec
    CMRR 93 dB
    CMRR Conditions Vss-100mV < Vout < Vdd+200mV
    Mono/Stereo Stereo
    Temperature Min -40 deg C
    Temperature Max 85 deg C
    Channels 2 Channels
    Input OutputType R-R In and Out
    Offset Voltage max, 25C 1.5 mV
    Automotive Yes

    Datasheets
    TitleSizeDateOther
    Language
    LME49721 High Performance, High Fidelity Rail-to-Rail Input/Output Audio Operational Amplifier751
    Kbytes
    21-Apr-10   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1767: Application Note 1767 LME49721 Evaluation Board649
    Kbytes
    24-Feb-08 中文

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LME49721MA/NOPB


    RoHS Status


    SOIC NARROW
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide391
    FARNELLEurope and Asia221
    RS COMPONENTSWorldwide42
    $1.50 each at 1K+ pcsrail
    of
    95
    LME49721MAX/NOPB

    LME49721MAX

    RoHS Status


    SOIC NARROW
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.50 each at 1K+ pcsreel
    of
    2500

    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 LME49721.

    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 LME49721 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LME49721MABD
    LME49721MABD Evaluation BoardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $150.00 each1

    The LME49721MA is a low distortion, low noise Rail-to-Rail Input/ Output operational amplifier optimized and fully specified for high performance, high fidelity applications. Combining advanced leading-edge process technology with state-of the-art circuitry, the LME49721 Rail-to-Rail Input/Output operational amplifier delivers superior signal amplification for outstanding signal path performance.

    This LME49721MABD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LME49721. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load.

    Features:

    • True Rail to Rail Input and Output.
           Easily Drives 10K ohm loads to within 10mv of each supply rail.
    • Optimized for Superior Audio Signal Fidelity
    • Output Short Circuit Protection

    Applications:

    • Ultra high quality portable audio amplification
    • High fidelity preamplifiers
    • High fidelity multimedia
    • State of the art phono pre amps
    • High performance professional audio
    • High fidelity equalization and crossover networks
    • High performance line drivers
    • High performance line receivers
    • High fidelity active filters
    • DAC I?V converter
    • ADC front-end signal conditioning

    Evaluation Board Contents:

    • Fully Assembled LME49721MABD Evaluation Board
    • Instructions for where to locate and download the datasheet

    Please note: application information and board layout can be found in datasheet




    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
    LME49721MA/NOPB

    69.761
    69.761
    SOIC NARROW81260DetailDownloadN/A
    NSZXTT
    L49721
    MA
    LME49721MAX/NOPB

    LME49721MAX
    69.761
    69.761
    SOIC NARROW81
    1
    260
    260
    DetailDownloadN/A
    NSZXTT
    L49721
    MA

    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 LME49721.

    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 LME49721 is located at RoHS Status.

    CAD Symbols and Models
    Download LME49721 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LME49721MACMOS70213010015840003449464325
    LME49721MAXCMOS70213010015840003449464325

    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 LME49721.

    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 LME49721 is located at RoHS Status.

    [Information as of 6-Feb-2012]