LM49350 High Perf Audio Codec Sub-Sys w/GND-Ref Stereo Hdphne Amp

108 Pages·2015·2.33 MB·English

LM49350, LM49350RLEVAL
www.ti.com SNAS359D–SEPTEMBER2008–REVISEDJUNE2012
LM49350 Boomer® Audio Power Amplifier Series High Performance Audio Codec Sub-
System with a Ground-Referenced Stereo Headphone Amplifier & an Ultra Low EMI Class
2
D Loudspeaker Amplifier with Dual I S/PCM Digital Audio Interfaces
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FEATURES • Micro-PowerShutdownMode
1
• HighPerformance96dBSNR StereoDAC • Availableinthe3.5x3.5mm 36BumpDSBGA
2
Package
• HighPerformance94dBSNRStereoADC
• Upto192kHzStereo AudioPlayback
APPLICATIONS
• Upto48kHzStereo Recording
• SmartPhones
• DualBidirectionalI2Sor PCMCompatible
• MobilePhonesandVOIPPhones
AudioInterfaces
• PortableGPSNavigatorandPortableGaming
• Read/WriteI2CCompatibleControl Interface
Devices
• FlexibleDigitalMixerwithSampleRate
• PortableDVD/CD/AAC/MP3/MP4Players
Conversion
• Digital Cameras/Camcorders
• DualSigma-DeltaPLLsfor Operationfromany
ClockatAnySamplerate
KEY SPECIFICATIONS
• Digital3DStereo Enhancement
• P atA_V =3.3V, Stereo32Ω,1%THD
• Dual5BandParametricEqualizers HP DD
69mW/ch(typ)
• CascadableDSPEffectsthatAllow 10Band
• P atLS_V =5V,8Ω,1%THD1.2W (typ)
ParametricEqualization LS DD
• P atLS_V =4.2V, 8Ω,1%THD825mW(typ)
• ALC/Compressor/LimiteronBoth DACand LS DD
ADCPaths • PLSatLS_VDD=3.3V, 8Ω,1%THD495mW(typ)
• UltraLowEMI,ClassDLoudspeakerAmplifier • PEPatA_VDD=3.3V, 32ΩBTL,1%THD58mW
withSpread Spectrum Control (typ)
• GroundReferencedOutputCap-Less • Supply VoltageRange
HeadphoneAmplifier Operation – D_V =1.7Vto2.0V
DD
• EarpieceSpeakerAmplifierwithReduced – LS_V andA_V =2.7Vto5.5V
DD DD
PowerConsumptionModeforMono – I/O_V =1.6Vto4.5V
DD
DifferentialLineoutApplications
• SNR(StereoDACat48kHz) 96dB(typ)
• Stereo AuxiliaryInputsorMonoDifferential
• SNR(StereoADCat48kHz) 94dB(typ)
Input
• PSRRat217Hz, A_V =3.3V, (HPfromAUX)
DD
• DifferentialStereo MicrophoneInputswith
97dB(typ)
Single-Ended Option
• AutomaticLevelControlforDigitalAudio DESCRIPTION
Inputs,Stereo MicrophoneInputs,andStereo
TheLM49350isahighperformanceaudiosubsystem
AuxiliaryInputs that supports both analog and digital audio functions.
• FlexibleAudioRouting fromInputtoOutput The LM49350 includes a high quality stereo DAC, a
high quality stereo ADC, a stereo headphone
• 16StepVolumeControlforMicrophoneswith
amplifier that supports ground referenced output cap-
2dBSteps
less operation, a dual mode earpiece speaker
• 32StepVolumeControlforAuxiliaryInputsin amplifier, and a low EMI Class D loudspeaker
1.5dB Steps amplifier. It is designed for demanding applications in
mobilephonesandother portabledevices.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
Alltrademarksarethepropertyoftheirrespectiveowners.
2
PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©2008–2012,TexasInstrumentsIncorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarilyincludetestingofallparameters.
LM49350, LM49350RLEVAL
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DESCRIPTION CONTINUED
The LM49350 features dual bi-directional I2S or PCM audio interfaces for full range audio and an I2C compatible
interface for control. The stereo DAC path features an SNR of 96dB with 24-bit 48 kHz input. The headphone
amplifier delivers 69mW (typ) to a 32Ω single-ended stereo load with less than 1% distortion (THD+N) when
RMS
A_V = 3.3V. The earpiece speaker amplifier delivers 58mW (typ) to a 32Ω bridged-tied load with less than
DD RMS
1% distortion (THD+N) when A_V = 3.3V. The loudspeaker amplifier delivers up to 495mW into an 8Ω load
DD
withlessthan1%distortionwhenLS_V =3.3Vandupto1.2WwhenLS_V =5.0V.
DD DD
The LM49350 employs advanced techniques to reduce power consumption, to reduce controller overhead, to
speed development time, and to eliminate click and pop. Boomer audio power amplifiers were designed
specifically to provide high quality output power with a minimal amount of external components. It is therefore
ideally suited for mobile phone and other low voltage applications where minimal power consumption, PCB area
andcostareprimaryrequirements.
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LM49350 Overview
I/O_VDD D_VDD DGND A_VDD AGND LS_VDD LSGND
AUX_OUT+
CLOCK
NETWORK POWER MANAGEMENT AB
MCLK with DUAL and CONTROL AUX_OUT-
6’(cid:3)PLLs
T
F
SSDCAL SLI2ACVE REGISTERS EL_CAD THGIR_C TFEL_ TH D LLSS -+
GPIO A X G T
D UA IR_XU FEL_C THG
6’ A IM IR
PORT1_CLK E ADC LEFT _CIM
C EFFECTS ADC CP+
PORT1_SYNC AF CHARGE CP-
RE VOL CTRL PUMP
PORT1_SDI TN 5-BAND EQ 6’ HP_VSS
I T SOFT CLIP
PORT1_SDO R ALC RIGHT
O
P ADC
O
ID
U
A
PORT2_CLK dn DAC 6’
a AB HPL
R EFFECTS LEFT
E DAC
PORT2_SYNC X
IM VOL CTRL
L DIGITAL 3D
PORT2_SDI A
T 5-BAND EQ
IG SOFT CLIP 6’
PORT2_SDO ID ALC RIGHT
DAC
AB HPR
AUX_L / MONO_IN+
VCM
-46.5 dB to 12 dB
AUX_R / MONO_IN-
VCM
BG VREF_FLT
VCM
LEFT_MIC/LINE+
LEFT_MIC/LINE-
6 dB to 36 dB
MIC_BIAS
RIGHT_MIC/LINE+
RIGHT_MIC/LINE-
Figure1. LM49350BlockDiagram
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Typical Application
D_VDD I/O_VDD A_VDD LS_VDD
HP_VSS LEFT_MIC-
LEFT_MIC+
VREF
CP+ MIC_BIAS
CP- RIGHT_MIC+
0.5 - 50
RIGHT_MIC-
MHz
MCLK
2
I C
Baseband LM49350 HPL
Controller
I2S/PCM HPR
(PORT1)
GPIO
LS+
LS-
8O
AUX_OUT+
Bluetooth I2S/PCM AUX_OUT- 32O
Transceiver
(PORT2)
DGND LSGND AGND AUX_L AUX_R
Synthesized
FM Radio/TV Tuner
Figure2. ExampleApplicationinMultimediaPhonewithaDedicatedEarpieceandMonoLoudspeaker
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D_VDD I/O_VDD A_VDD LS_VDD
HP_VSS LEFT_MIC-
LEFT_MIC+
VREF
CP+ MIC_BIAS
CP- RIGHT_MIC+
0.5 - 50 RIGHT_MIC-
MHz
MCLK
2
I C
Baseband LM49350 HPL
Controller
I2S/PCM HPR
(PORT1)
LS+
LS-
AUX_OUT+
Bluetooth I2S/PCM AUX_OUT- LM4675
Transceiver
(PORT2)
GPIO
DGND LSGND AGND AUX_L AUX_R LM4675 Can Be Used
for Stereo 8:(cid:3)Loudspeakers
Synthesized
FM Radio/TV Tuner
Figure3. ExampleApplicationinMultimediaPhoneUsingStereoLoudspeaker
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D_VDD I/O_VDD A_VDD LS_VDD
HP_VSS LEFT_MIC-
LEFT_MIC+
VREF
CP+ MIC_BIAS
CP- RIGHT _MIC+
0.5 - 50
RIGHT _MIC-
MHz
MCLK
2
I C
HPL
Baseband
LM49350
Controller
I2S/PCM HPR
(PORT1)
GPIO LS+
LS-
AUX_OUT+
Bluetooth I2S/PCM AUX_OUT- Voice
Transceiver Modem
(PORT2) MONO_IN+
MONO_IN-
DGND LSGND AGND
Figure4. ExampleApplicationinaMultimediaPhoneUsingaDedicatedRFModuleforVoiceModern
Functions
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D_VDD I/O_VDD A_VDD LS_VDD
HP_VSS LEFT_MIC-
LEFT_MIC+
VREF
CP+ MIC_BIAS
HPL
CP-
0.5 - 50
MHz
MCLK HPR
2
I C
MP3/MP4 LM49350
LS+
CODEC
LS-
2
I S/PCM
(PORT1)
AUX_OUT+
LM4675
AUX_OUT-
GPIO
LM4675 Can Be Used
for Stereo Loudspeakers
RIGHT_LINE+
Bluetooth 2 Synthesized
I S/PCM
Transceiver RIGHT_LINE- FM Radio/
(PORT2)
TV Tuner
AUX_IN+
(Stereo
AUX_IN- Differential)
DGND LSGND AGND
Figure5. ExampleApplicationinaPortableMediaPlayerwithaDifferential StereoLineInput
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Connection Diagram
Figure6. 36BumpDSBGA
TopView (BumpSideDown)
SeePackageNumberYPG0036TTA
PINDESCRIPTIONS
Pin PinName Type Direction Description
A1 HPR Analog Output Headphonerightoutput
A2 A_V Supply Input Headphoneandmixerpowersupplyinput
DD
A3 AGND Supply Input Headphoneandmixerground
A4 VREF_FLT Analog Input/Output Filterpointforthemicrophonepowersupplyandinternalreferences
A5 GPIO Digital Input/Output Generalpurposeinputoroutput
A6 SDA Digital Input/Output I2Cinterfacedataline
B1 HPL Analog Output Headphoneleftoutput
B2 AUX_R Analog Input Rightanaloginput
B3 AUX_L Analog Input Leftanaloginput
B4 PORT2_SYNC Digital Input/Output AudioPort2SYNCSignal(canbemasterorslave)
B5 PORT2_SDI Digital Input AudioPort2serialdatainput
B6 SCL Digital Input I2Cinterfaceclockline
C1 HP_V Analog Output Negativepowersupplypinfortheheadphoneamplifier
SS
C2 AUX_OUT+ Analog Output Auxiliarypositiveoutput
C3 AUX_OUT- Analog Output Auxiliarynegativeoutput
C4 PORT2_SDO Digital Output Audioport2serialdataout
C5 PORT2_CLK Digital Input/Output Audioport2clocksignal(canbemasterorslave)
C6 MCLK Digital Input Inputclockfrom0.5MHzto50MHz
D1 CP- Analog Input/Output Chargepumpflyingcapacitornegativeinput
D2 CP+ Analog Input/Output Chargepumpflyingcapacitorpositiveinput
D3 MIC_BIAS Analog Output Microphoneultracleansupply(2.2V)
D4 PORT1_SYNC Digital Input/Output AudioPort1syncsignal(canbemasterorslave)
D5 PORT1_SDO Digital Output AudioPort1serialdataoutput
D6 DGND Supply Input Digitalground
E1 LSGND Supply Input Loudspeakerground
E2 LS_V Supply Input Loudspeakerpowersupplyinput
DD
E3 RIGHT_MIC- Analog Input Rightmicrophonenegativeinput
E4 LEFT_MIC- Analog Output Leftmicrophonenegativeinput
E5 PORT1_SDI Digital Input AudioPort1serialdatainput
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PINDESCRIPTIONS(continued)
Pin PinName Type Direction Description
E6 D_V Supply Input Digitalpowersupplyinput
DD
F1 LS+ Analog Output Loudspeakerpositiveoutput
F2 LS- Analog Output Loudspeakernegativeoutput
F3 RIGHT_MIC+ Analog Input Rightmicrophonepositiveinput
F4 LEFT_MIC+ Analog Input Leftmicrophonepositiveinput
F5 PORT1_CLK Digital Input/Output AudioPort1clocksignal(canbemasterorslave)
F6 I/O_V Supply Input Digitalinterfacepowersupplyinput
DD
PIN TYPE DEFINITIONS
AnalogInput— Apinthatisusedbytheanalogandisneverdrivenbythedevice. Suppliesarepart ofthis
classification.
AnalogOutput— Apinthatisdrivenbythedeviceandshouldnotbedrivenbyexternalsources.
AnalogInput/Output— Apinthatistypicallyusedfor filteringaDCsignalwithinthedevice. Passive
componentscanbeconnectedtothesepins.
DigitalInput— Apinthatisusedbythedigitalbutisneverdrivenbythedevice.
DigitalOutput— Apinthatisdrivenbythedeviceandshouldnotbedrivenbyanother devicetoavoid
contention.
DigitalInput/Output— Apinthatiseitheropendrain(SDA)orabidirectionalCMOSin/out. Inthelattercase
thedirectionisselectedbyacontrolregisterwithintheLM49350.
Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
ABSOLUTE MAXIMUM RATINGS(1)(2)(3)
AnalogSupplyVoltage (A_V andLS_V ) 6.0V
DD DD
DigitalSupplyVoltageD_V 2.2V
DD
I/OSupplyVoltageI/O_V 5.5V
DD
StorageTemperature −65°Cto+150°C
PowerDissipation(4) InternallyLimited
ESDRatings HumanBodyModel(5) 2000V
MachineModel(6) 200V
JunctionTemperature 150°C
ThermalResistanceθ –YPG36(soldereddowntoPCBwith2in21oz.copperplane) 60°C/W
JA
SolderingInformation SeeApplicationsNoteAN-1112(SNVA009).
(1) “AbsoluteMaximumRatings”indicatelimitsbeyondwhichdamagetothedevicemayoccur,includinginoperabilityanddegradationof
devicereliabilityand/orperformance.Functionaloperationofthedeviceand/ornon-degradationattheAbsoluteMaximumRatingsor
otherconditionsbeyondthoseindicatedintheRecommendedOperatingConditionsisnotimplied.TheRecommendedOperating
Conditionsindicateconditionsatwhichthedeviceisfunctionalandthedeviceshouldnotbeoperatedbeyondsuchconditions.All
voltagesaremeasuredwithrespecttothegroundpin,unlessotherwisespecified.
(2) TheElectricalCharacteristicstableslistensuredspecificationsunderthelistedRecommendedOperatingConditionsexceptas
otherwisemodifiedorspecifiedbytheElectricalCharacteristicsConditionsand/orNotes.Typicalspecificationsareestimationsonlyand
arenotensured.
(3) IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheTexasInstrumentsSalesOffice/Distributorsforavailabilityand
specifications.
(4) ThemaximumpowerdissipationmustbederatedatelevatedtemperaturesandisdictatedbyT ,θ ,andtheambienttemperature,
JMAX JA
T .ThemaximumallowablepowerdissipationisP =(T -T )/θ orthenumbergiveninAbsoluteMaximumRatings,
A DMAX JMAX A JA
whicheverislower.
(5) Humanbodymodel,applicablestd.JESD22-A114C.
(6) Machinemodel,applicablestd.JESD22-A115-A.
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OPERATING RATINGS
TemperatureRange −40°Cto+85°C
SupplyVoltage A_V andLS_V (1) 2.7Vto5.5V
DD DD
D_V 1.7Vto2.0V
DD
I/O_V 1.6Vto4.5V
DD
(1) LS_V needtobethehighestvoltagethanA_V ,D_V ,andI/O_V .Forproperpowersupplysequence,LS_V needtobe
DD DD DD DD DD
appliedfirst.
ELECTRICAL CHARACTERISTICS: A_V = LS_V = 3.3V; D_V = I/O_V = 1.8V(1)(2)
DD DD DD DD
ThefollowingspecificationsapplyforR =8Ω,R =32Ω,f=1kHz,unlessotherwisespecified.LimitsapplyforT =
L(LS) L(HP) A
25°C.
LM49350 Units
Symbol Parameter Conditions
Typical(3) Limit(4) (Limits)
DCCHARACTERISTICS(DigitalcurrentcombinesD_V andI/O_V .AnalogcurrentcombinesA_V andLS_V )
DD DD DD DD
ShutdownMode,
DI DigitalShutdownCurrent 2 15 µA(max)
SD f =13MHz,PLLOff
MCLK
DI DigitalStandbyCurrent f =12.288MHz,PMCOnonly 0.25 1 mA(max)
ST MCLK
f =11.2896MHz,f =44.1kHz,
MCLK S
DigitalActiveCurrent(MP3Mode) StereoDACOn,OSR =128, 0.9 2 mA(max)
DAC
PLLOff,HPOn
DigitalActiveCurrent(FMMode) f =13MHz
MCLK 0.2 0.5 mA(max)
AnalogAudiomodes
DIDD DigitalActiveCurrent(FMRecord fMCLK=12.288MHz,fS=48kHz,
Mode) StereoADCOn,OSR =128, 1.5 2 mA(max)
ADC
PLLOff,StereoAnalogInputsOn
DigitalActiveCurrent(CODEC f =11.2896MHz,f =44.1kHz,
MCLK S
Mode)- MonoADCOn,StereoDACOn, 2.7 3.8 mA(max)
OSR=128,PLLOff,MICOn
AI AnalogShutdownCurrent ShutdownMode 0.3 5 μA(max)
SD
AI AnalogStandbyQuiescentCurrent ReferenceVoltagesOnonly 0.85 1.5 mA(max)
ST
f =11.2896MHz,f =44.1kHz,
MCLK S
AnalogSupplyCurrent(MP3Mode) StereoDACOn,OSR =128, 7.8 10 mA(max)
DAC
PLLOff,HPOn
AnalogSupplyCurrent(FMMode) StereoAnalogInputsOn,HPOn 5.3 7 mA(max)
AIDD AnalogSupplyCurrent(FMRecord fMCLK=12.288MHz,fS=48kHz,
StereoADCOn,OSR =128, 9.8 12 mA(max)
Mode) ADC
PLLOff,StereoAnalogInputsOn
f =11.2896MHz,f =44.1kHz,
AnalogSupplyCurrent(CODEC MCLK S
MonoADCOn,StereoDACOn, 13 15 mA(max)
Mode)
OSR=128,PLLOff,MICOn
f =13MHz,
PLLI PLLTotalActiveCurrent MCLK 2.9 5.5 mA(max)
DD f =12MHz,PLLOnonly
PLLOUT
HPI HeadphoneQuiescentCurrent StereoHPOnonly 3.5 mA
DD
LSI LoudspeakerQuiescentCurrent LSOnonly 2.9 mA
DD
MICI MicrophoneQuiescentCurrent monoMIC+MICBiasOn 0.5 mA
DD
ADCI ADCTotalActiveCurrent f =48kHz,Stereo 9 mA
DD S
DACI DACTotalActiveCurrent f =48kHz,Stereo 5.5 mA
DD S
(1) “AbsoluteMaximumRatings”indicatelimitsbeyondwhichdamagetothedevicemayoccur,includinginoperabilityanddegradationof
devicereliabilityand/orperformance.Functionaloperationofthedeviceand/ornon-degradationattheAbsoluteMaximumRatingsor
otherconditionsbeyondthoseindicatedintheRecommendedOperatingConditionsisnotimplied.TheRecommendedOperating
Conditionsindicateconditionsatwhichthedeviceisfunctionalandthedeviceshouldnotbeoperatedbeyondsuchconditions.All
voltagesaremeasuredwithrespecttothegroundpin,unlessotherwisespecified.
(2) TheElectricalCharacteristicstableslistensuredspecificationsunderthelistedRecommendedOperatingConditionsexceptas
otherwisemodifiedorspecifiedbytheElectricalCharacteristicsConditionsand/orNotes.Typicalspecificationsareestimationsonlyand
arenotensured.
(3) TypicalvaluesrepresentmostlikelyparametricnormsatT =+25ºC,andattheRecommendedOperationConditionsatthetimeof
A
productcharacterizationandarenotensured.
(4) Datasheetmin/maxspecificationlimitsarespecifiedbytestorstatisticalanalysis.
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