LM4543VH ,AC 97 Codec with National 3D SoundElectrical Characteristics (Notes 1, 3)The following specifications apply for AV = 5V, DV = 5V unle ..
LM4543VHX ,AC 97 Codec with Stereo with National 3D SoundElectrical Characteristics (Notes 1, 3)The following specifications apply for AV = 5V, DV = 5V unle ..
LM4546AVH ,AC '97 Rev 2.1 Codec with Sample Rate Conversion and National 3D Soundfeatures full duplex stereoADCs and DACskHz in 1 Hz incrementsand analog mixers with access to 2 st ..
LM4546VH ,AC '97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound [Life-time buy]features full duplex stereo A/D’s and D/A’sn AC’97 Rev 2 compliantand an analog mixer with 2 stereo ..
LM4546VHX ,AC '97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound [Life-time buy]Block Diagram 2000 National Semiconductor Corporation DS100985 Absolute Maximum Ratings (Note 3) So ..
LM4548AVH ,AC '97 Rev 2.1 Codec with Sample Rate Conversion and National 3D Soundfeatures full duplex stereoADCs and DACskHz in 1 Hz incrementsand analog mixers with access to 4 st ..
LP2952IM-3.3 ,Adjustable Micropower Low-Dropout Voltage RegulatorFeaturesn Output voltage adjusts from 1.23V to 29VThe LP2952 and LP2953 are micropower voltage regu ..
LP2952IM-3.3 ,Adjustable Micropower Low-Dropout Voltage RegulatorApplicationsload regulation.n High-efficiency linear regulatorThe parts are available in DIPand sur ..
LP2952IMX ,Adjustable Micropower Low-Dropout Voltage RegulatorFeaturesn Output voltage adjusts from 1.23V to 29VThe LP2952 and LP2953 are micropower voltage regu ..
LP2952IMX/NOPB ,Adjustable Micropower Low-Dropout Voltage Regulator 16-SOIC -40 to 125features, and an improved• Reverse Battery-Input Protectionshutdown function.• 50-mA (Typical) Auto ..
LP2952IMX-3.3 ,Adjustable Micropower Low-Dropout Voltage RegulatorFeaturesn Output voltage adjusts from 1.23V to 29VThe LP2952 and LP2953 are micropower voltage regu ..
LP2952IN ,Adjustable Micropower Low-Dropout Voltage RegulatorFeaturesn Output voltage adjusts from 1.23V to 29VThe LP2952 and LP2953 are micropower voltage regu ..
LM4543VH
AC 97 Codec with National 3D Sound
LM4543 ’97 Codec with National 3D Sound
General DescriptionThe LM4543isan audio codecforPC systems which per-
formsthe analog-intensive functionofthe Analog Codec’97
Rev 1.03 architecture. Using 18-BitΣΔA/DandD/A convert-
ers,the LM4543 provides 90dBof dynamic range.
The LM4543 was designed specificallyto providea high
qualityaudio pathandprovideall analogfunctionalityin aPC
audio system.It featuresfull duplex stereo A/D’sand D/A’s
andan analog mixer with4 stereoand3 mono inputs, each whichhas separate gain, attenuationand mute control.In
addition,the LM4543 provides National’s3D Sound stereo
enhancement technology.
The LM4543featuresAC-Link, asynchronous, fixedratese-
rialbusfor connectiontothe digitalAC’97 Controller. The
separationofthe analogand digital functionsoftheAC’97
architecture allowsfor system design flexibility andin-
creased overall performance.
Key Specifications Analog Mixer Dynamic Range 95dB (typ) D/A Dynamic Range 89dB (typ) A/D Dynamic Range 90dB (typ)
Features Audio Codec’97 compliant Stereo 18-Bit ΣΔA/D’sand D/A’s with 128X
oversampling National’s3D Sound circuitry Power management support Digital Interface3Vand5V compliant
Applications DesktopPC Audio Systems PortablePC Audio Systems MobilePC Audio Solutions
Block DiagramDS100907-1
FIGURE1. LM4543 Block DiagramFebruary 1999
LM4543
’97
Codec
with
National
Sound 1999 National Semiconductor Corporation DS100907
