Especificações Técnicas

FEATURES 3 DESCRIPTION 1- COMPLIANT WITH AC 97 REV 2.1 THE LM4549B DEVICE IS AN AUDIO CODEC FOR PC SYSTEMS WHICH IS FULLY COMPLIANT WITH THE PC99 AND - HIGH-QUALITY SAMPLE RATE CONVERSION FROM 4 KHZ PERFORMS THE ANALOG INTENSIVE S OF THE AC 97 TO 48 KHZ IN 1-HZ INCREMENTS REV 2.1 ARCHITECTURE. USING 18-BIT SIGMA-DELTA ADCS - MULTIPLE CODEC SUPPORT AND DACS, THE LM4549B PROVIDES 90 DB OF DYNAMIC RANGE. - TRUE LINE LEVEL OUTPUT WITH SEPARATE GAIN CONTROL THE LM4549B WAS DESIGNED SPECIFICALLY TO PROVIDE A - TEXAS INSTRUMENTS 3D SOUND STEREO HIGH QUALITY AUDIO PATH AND PROVIDE ALL ANALOG ENHANCEMENT CIRCUITRY ALITY IN A PC AUDIO SYSTEM. IT FEATURES FULL DUPLEX STEREO ADCS AND DACS AND ANALOG MIXERS - ADVANCED POWER MANAGEMENT SUPPORT WITH ACCESS TO 4 STEREO AND 4 MONO INPUTS. EACH - EXTERNAL AMPLIFIER POWER DOWN (EAPD) CONTROL MIXER INPUT HAS SEPARATE GAIN, ATTENUATION AND MUTE - PC-BEEP PASSTHROUGH TO LINE OUT DURING CONTROL AND THE MIXERS DRIVE 1 MONO- AND 2-STEREO INITIALIZATION OR COLD RESET OUTPUTS, EACH WITH ATTENUATION AND MUTE CONTROL. THE LM4549B SUPPORTS TEXAS INSTRUMENTS 3D SOUND - DIGITAL 3.3-V AND 5-V SUPPLY OPTIONS STEREO ENHANCEMENT AND A COMPREHENSIVE SAMPLE - EXTENDED TEMPERATURE: -40°C - TA - 85°C RATE CONVERSION CAPABILITY. THE SAMPLE RATE FOR THE - KEY SPECIFICATIONS ADCS AND DACS CAN BE PROGRAMMED SEPARATELY WITH A RESOLUTION OF 1 HZ TO CONVERT ANY RATE IN THE RANGE 4 - ANALOG MIXER DYNAMIC RANGE: 97 DB (TYPICAL) KHZ - 48 KHZ. SAMPLE TIMING FROM THE ADCS AND - DAC DYNAMIC RANGE: 89 DB (TYPICAL) SAMPLE REQUEST TIMING FOR THE DACS ARE COMPLETELY - ADC DYNAMIC RANGE: 90 DB (TYPICAL) DETERMINISTIC TO EASE TASK SCHEDULING AND APPLICATION SOFTWARE DEVELOPMENT. THESE FEATURES TOGETHER WITH 2 APPLICATIONS AN EXTENDED TEMPERATURE RANGE ALSO MAKE THE LM4549B SUITABLE FOR NON-PC CODEC APPLICATIONS.     AC 97 REV 2.1 CODEC WITH SAMPLE RATE CONVERSION AND NATIONAL 3D SOUND AC 97 REV 2.1 CODEC WITH SAMPLE RATE CONVERSION AND NATIONAL 3D SOUND   THE IS AN AUDIO CODEC FOR PC SYSTEMS WHICH IS FULLY PC98 COMPLIANT AND PERFORMS THE ANALOG INTENSIVE S OF THE AC97 REV2.1 ARCHITECTURE. USING 18-BIT SIGMA-DELTA A/DS AND D/AS, THE LM4549A PROVIDES 90DB OF DYNAMIC RANGE. THE LM4549A WAS DESIGNED SPECIFICALLY TO PROVIDE A HIGH QUALITY AUDIO PATH AND PROVIDE ALL ANALOG ALITY A PC AUDIO SYSTEM. IT FEATURES FULL DUPLEX STEREO A/DS AND D/AS AND AN ANALOG MIXER WITH 4 STEREO AND 3 MONO INPUTS, EACH OF WHICH HAS SEPARATE GAIN, ATTENUATION AND MUTE CONTROL. THE CODEC FEATURES A SECOND LINE OUTPUT KNOWN AS TRUE LINE LEVEL OUT THAT IS IDENTICAL TO LINE OUT BUT WITH INDEPENDENT VOLUME CONTROL. THE LM4549A ALSO FEATURES NATIONALS 3D SOUND STEREO ENHANCEMENT AND VARIABLE SAMPLE RATE CONVERSION. THE SAMPLE RATE FOR THE A/D AND D/A CAN BE PROGRAMMED SEPARATELY WITH A RESOLUTION 1HZ TO CONVERT ANY RATE BETWEEN 4KHZ-48KHZ. THE AC97 ARCHITECTURE SEPARATES THE ANALOG AND DIGITAL S OF THE PC AUDIO SYSTEM ALLOWING BOTH FOR SYSTEM DESIGN FLEXIBILITY AND INCREASED PERFORMANCE. N ANALOG MIXER DYNAMIC RANGE N D/A DYNAMIC RANGE N A/D DYNAMIC RANGE 97DB (TYP) 89DB (TYP) 90DB (TYP)   FEATURES N AC97 REV 2.1 COMPLIANT N NATIONALS 3D SOUND CIRCUITRY N HIGH QUALITY SAMPLE RATE CONVERSION (SRC) FROM IN 1HZ INCREMENTS. N MULTIPLE CODEC SUPPORT N EXTERNAL AMPLIFIER POWER DOWN (EAPD) CONTROL FROM CODEC N PC-BEEP PASSTHROUGH TO LINE OUT RESET IS HELD ACTIVE LOW N TRUE LINE LEVEL OUTPUT WITH VOLUME CONTROL INDEPENDENT OF LINE OUT N DIGITAL 3V AND 5V COMPLIANT   APPLICATIONS N DESKTOP PC AUDIO SYSTEMS ON PCI CARDS, AMR CARDS, OR WITH MOTHERBOARD CHIPS SETS FEATURING AC-LINK N PORTABLE PC SYSTEMS AS ON MDC CARDS, OR WITH A CHIPSET OR ACCELERATOR FEATURING AC-LINK VAPOR PHASE (60 SEC.) INFRARED (15 SEC.) SEE AN-450 SURFACE MOUNTING AND THEIR EFFECTS ON PRODUCT RELIABILITY FOR OTHER METHODS OF SOLDERING SURFACE MOUNT DEVICES. JA (TYP) VBH48A IF MILITARY/AEROSPACE SPECIFIED DEVICES ARE REQUIRED, PLEASE CONTACT THE NATIONAL SEMICONDUCTOR SALES OFFICE/ DISTRIBUTORS FOR AVAILABILITY AND SPECIFICATIONS. SUPPLY VOLTAGE STORAGE TEMPERATURE INPUT VOLTAGE ESD SUSCEPTIBILITY (NOTE 5) PIN 3 ESD SUSCEPTIBILITY (NOTE 6) PIN 3 JUNCTION TEMPERATURE SOLDERING INFORMATION LQFP PACKAGE -0.3V TO VDD 100V 150°C   TEMPERATURE RANGE TMIN TA TMAX ANALOG SUPPLY RANGE DIGITAL SUPPLY RANGE 85°C 4.2V AVDD 5.5V 3.0V DVDD 5.5V ELECTRICAL CHARACTERISTICS (NOTES 1, 3) THE FOLLOWING SPECIFICATIONS APPLY FOR AVDD = 5V, DVDD = 48KHZ, SINGLE CODEC CONFIGURATION, UNLESS OTHERWISE NOTED. LIMITS APPLY FOR TA= 25°C. THE REFERENCE FOR IS 1VRMS UNLESS OTHERWISE SPECIFIED. SYMBOL PARAMETER CONDITIONS LM4549A TYPICAL (NOTE 7) AVDD DVDD ANALOG SUPPLY RANGE DIGITAL SUPPLY RANGE DIGITAL QUIESCENT POWER SUPPLY CURRENT ANALOG QUIESCENT POWER SUPPLY CURRENT DIGITAL SHUTDOWN CURRENT ANALOG SHUTDOWN CURRENT REFERENCE VOLTAGE POWER SUPPLY REJECTION RATIO CD INPUT TO LINE OUTPUT, -60DB INPUT THD N, A-WEIGHTED = 10K LIMIT (NOTE DIDD DVDD = 5V DVDD = 3.3V AIDD IDSD IASD VREF PSRR V (MIN) V (MAX) V (MIN) V (MAX) V DB UNITS (LIMITS)   ANALOG LOOPTHRU MODE DYNAMIC RANGE (NOTE 2) THD VIN TOTAL HARMONIC DISTORTION LINE INPUT VOLTAGE MIC INPUT WITH 20DB GAIN MIC INPUT WITH 0DB GAIN XTALK ZIN CIN CROSSTALK INPUT IMPEDANCE(NOTE 2) INPUT CAPACITANCE INTERCHANNEL GAIN MISMATCH RECORD GAIN AMPLIFIER - A/D AS MIXER SECTION AS AM STEP SIZE MUTE ATTENUATION 86 DB STEP SIZE DB CD LEFT TO RIGHT CD LEFT TO RIGHT DB (MIN) % (MAX) VRMS DB K (MIN) PF DB (CONTINUED) THE FOLLOWING SPECIFICATIONS APPLY FOR AVDD = 5V, DVDD = 48KHZ, SINGLE CODEC CONFIGURATION, UNLESS OTHERWISE NOTED. LIMITS APPLY FOR TA= 25°C. THE REFERENCE FOR IS 1VRMS UNLESS OTHERWISE SPECIFIED. SYMBOL PARAMETER CONDITIONS LM4549A TYPICAL (NOTE 7) RESOLUTION DYNAMIC RANGE (NOTE 2) FREQUENCY RESPONSE -60DB INPUT THD N, A-WEIGHTED -1DB BANDWIDTH -60DB INPUT THD N, A-WEIGHTED VIN 0.30 X DVDD 0.40 X DVDD 0.50 X DVDD 0.20 X DVDD AC LINK INPUTS HIGH IMPEDANCE AC LINK OUTPUTS AC LINK OUTPUTS 12.288 81.4 VARIATION OF BIT_CLK PERIOD FROM 50% DUTY CYCLE SDATA_IN, SDATA_OUT TO FALLING EDGE OF BIT_CLK HOLD TIME OF SDATA_IN, SDATA_OUT FROM FALLING EDGE OF BIT_CLK BIT_CLK, SYNC, SDATA_IN OR SDATA_OUT BIT_CLK, SYNC, SDATA_IN OR SDATA_OUT FOR COLD RESET LIMIT (NOTE 8) BITS DB (MIN) KHZ BITS DB (MIN) HZ MS (MAX) DB   UNITS (LIMITS) DIGITAL TO ANALOG CONVERTERS RESOLUTION DYNAMIC RANGE (NOTE 2) THD TOTAL HARMONIC DISTORTION FREQUENCY RESPONSE GROUP DELAY (NOTE 2) OUT OF BAND ENERGY STOP BAND REJECTION AS AM DISCRETE TONES STEP SIZE MUTE ATTENUATION TRUE LINE LEVEL OUTPUT VOLUME SECTION LM4549A AC97 REV 2.1 MULTI-CHANNEL AUDIO CODEC 48-LQFP MAIORES DETALHES DE LM4549A NO SITE DO FABRICANTE: HTTPS://WWW.TI.COM/LIT/DS/SYMLINK/LM4549B.PDF?TS=1651327766304&REF_URL=HTTPS%253 TAGS DE LM4549A: LM4549A, LM4549, LM4549B, LM4549AVH, LM4549BVH, LM4549BVHX, LM4549BVH/NOPB

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