LM4831VF ,Multimedia Computer Audio ChipElectrical Characteristics(Notes 1, 2) The following specifications apply for V = 5V, R =8Ω andf=1 ..
LM4832M ,Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D SoundLM4832 Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier,Microphone Pr ..
LM4832MT ,Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D SoundApplicationsphone preamp stage, it is optimally suited to multimedian Multimedia Monitorsmonitors a ..
LM4832MX ,Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D SoundGeneral Description Key Specificationsn Output Power at 10% into 8Ω 350mW (typ)The LM4832 is a mono ..
LM4832N ,Digitally Controlled Tone and Volume Circuit with Stereo Audio Power Amplifier, Microphone Preamp Stage and National 3D SoundGeneral Description Key Specificationsn Output Power at 10% into 8Ω 350mW (typ)The LM4832 is a mono ..
LM4834 ,1.75W Audio Power Amplifier with DC Volume Control and Microphone PreampElectrical Characteristics for Bridged Speaker Amplifer(Notes 1, 2)The following specifications app ..
LP2980IM5-3.1 ,Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD Packagesapplications.n Guaranteed 50 mAoutput currentUsing an optimized VIP™ (Vertically Integrated PNP) pr ..
LP2980IM5-3.1 ,Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD PackagesLP2980 Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD PackagesJanuary 2003LP2 ..
LP2980IM5-3.2 ,Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD Packagesapplications.n Guaranteed 50 mAoutput currentUsing an optimized VIP™ (Vertically Integrated PNP) pr ..
LP2980IM5-3.3 ,Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD PackagesFeaturesn Ultra low dropout voltageThe LP2980 is a 50 mA, fixed-output voltage regulator de-signed ..
LP2980IM5-3.5 ,Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD Packagesapplications.n Guaranteed 50 mAoutput currentUsing an optimized VIP™ (Vertically Integrated PNP) pr ..
LP2980IM5-3.6 ,Micropower 50 mA Ultra Low-Dropout Regulator In SOT-23 and micro SMD Packagesapplications.n Guaranteed 50 mAoutput currentUsing an optimized VIP™ (Vertically Integrated PNP) pr ..
LM4831VF
Multimedia Computer Audio Chip
LM4831
Multimedia Computer Audio Chip
General DescriptionThe LM4831isa monolithicintegrated circuitthat providesa
stereo threeinputmixer,two stereo input analog multiplexer, stereolineoutanda dual1W bridged audio power ampli-
fier.In addition,alow noise microphone preampis included
on-chip.
The LM4831is idealfor multimedia computers sinceit incor-
poratesan input mixer, analog multiplexer,and configurable
stereo audio power amplifier,as wellasa microphone
preamp stage. This combination allowsforallofthe analog
audio processingtobe enclosedina 44-pin TQFP package.
The LM4831 featuresan externally controlled, low-power
consumption shutdown mode,as wellas both headphone
and docking station modes.To temporarily overridethe shut-
down mode and allow audio signalstobe amplified,the
LM4831 provides four “beep” pins.
Key Specifications THD+Nat1Winto8Ω 0.6% (typ) Microphone Input Referred Noise 10μV (typ) Supply Current- Bridged Mode 16mA (typ) Shutdown Current 2μA (typ)
Features Stereo1W audio power amplifier “Clickand pop” suppression circuitry Stereo three input mixer Shutdown mode Multiple operating modes —bridged, single-endedand
docking station modes Internal muxfor switching in/out external filter Beep circuitryfor “wake-up” whilein shutdown44Pin TQFP Packaging
Applications Portableand Desktop Computers
Block Diagram Connection DiagramBoomer®isa registeredtrademarkofNationalSemiconductor Corporation.
TRI-STATE®isa registeredtrademark ofNationalSemiconductorCorporation.
DS100057-1
FIGURE1. LM4831 Block DiagramDS100057-3
Top View
Order Number LM4831VF
SeeNS Package Number VEJ44ANovember 1998
LM4831
Multimedia
Computer
Audio
Chip 1998 National Semiconductor Corporation DS100057
