National Semiconductor | High-performance Analog

 

 LM49321   
Audio Sub-System with Stereo DAC, Mono Class AB Loudspeaker Amplifier, OCL/SE Stereo Headphone Output and RF Suppression 		Click link to Download

Features

  • 18-bit stereo DAC with up to 192kHz sampling rate
  • Multiple distinct output modes
  • Mono class AB speaker amplifier
  • Stereo OCL/SE headphone amplifier
  • Mono earpiece amplifier
  • Differential mono analog input
  • Single-ended analog inputs
  • Independent loudspeaker, headphone and mono earpiece volume controls
  • I 2C/SPI (selectable) compatible interface
  • Ultra low shutdown current
  • Click and Pop Suppression circuit

    • Description

    The LM49321 is an integrated audio sub-system designed for mono voice, stereo music cell phones connecting to base band processors with mono differential analog voice paths. Operating on a 3.3V supply, it combines a mono speaker amplifier delivering 520mW into an 8Ω load, a stereo headphone amplifier delivering 36mW per channel into a 32Ω load, and a mono earpiece amplifier delivering 55mW into a 32Ω load. The headphone amplifier can be configured for output capacitor-less (OCL) or single-ended (SE) mode. It integrates the audio amplifiers, volume control, mixer, and power management control all into a single package. In addition, the LM49321 routes and mixes the single-ended stereo and differential mono inputs into multiple distinct output modes. The LM49321 features an I 2S serial interface for full range audio and an I 2C or SPI compatible interface for control. The full range music path features an SNR of 85dB with up to 192kHz playback.

    Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.

    Key Specification
    ■  POUT LS, 8Ω, 3.3V, 1% THD+N 520mW (typ)
    ■  POUT HP, 32Ω, 3.3V, 1% THD+N 36mW (typ)
    ■  POUT Mono Earpiece, 32Ω   1% THD+N 55mW (typ)
    ■   Shutdown current 0.6µA (typ)
    ■   SNR (DAC + Amplifier) 85dB (typ)


    Applications

  • Cell Phones
  • PDAs
  • Laptop computers
  • Portable devices

    		• Block Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Power @ 5V 8Ohms, 1% THD 1.25 Watt
    Speaker THD+N 0.04 %
    HP THD+N 0.01 %
    Speaker PSRR 76 dB
    HP PSRR 72 dB
    Speaker SNR 85 dB
    HP SNR 85 dB
    Audio Mux Yes
    Audio Mode Control I2C, SPI
    Supply Range +2.7 - +5.5 V
    Temperature Min -40 deg C
    Temperature Max 85 deg C
    Mono Analog Inputs 1
    Stereo Analog Inputs 1
    Digital Audio Ports 1
    Loudspeaker Type Class AB
    Loudspeaker Outputs 1
    Headphone Type Virtual Ground
    AEC Q-100 Automotive Grade Undefined
    Automotive No
    PowerWise No
    A/D Channels 0 Channels

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM49321RL/NOPB


    RoHS Status

    MICRO SMDXT    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide600
    MOUSERWorldwide250
    		$2.99 each at 1K+ pcsreel
    of
    250
    LM49321RLX/NOPB


    RoHS Status

    MICRO SMDXT    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$2.99 each at 1K+ pcsreel
    of
    1000

    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 LM49321.

    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 LM49321 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM49321RL/NOPB

    		12.778
    		MICRO SMDXT361260DetailDownloadN/A
    		XYTT
    I GK9
    LM49321RLX/NOPB

    		12.778
    		MICRO SMDXT361260DetailDownloadN/A
    		XYTT
    I GK9

    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 LM49321.

    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 LM49321 is located at RoHS Status.

    CAD Symbols and Models
    Download LM49321 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM49321RLCMOS70213010015840003449464325
    LM49321RLXCMOS70213010015840003449464325

    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 LM49321.

    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 LM49321 is located at RoHS Status.

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