LM4931 Audio Subsystem w/Mono High Eff Loudspeaker & Stereo Headphone Amps datasheet

50 Pages·2017·1.31 MB·English

LM4931
www.ti.com SNAS251E–APRIL2004–REVISEDMAY2013
LM4931 Boomer™ Audio Power Amplifier Series Audio Subsystem with Mono High
Efficiency Loudspeaker and Stereo Headphone Amplifiers
CheckforSamples:LM4931
FEATURES KEY SPECIFICATIONS
1
• 18-bit44.1kHzor 48kHzStereoDAC • P atAV =5V,8Ω
23 LS OUT DD
• 16-bit8kHz,12kHz,16kHz,or 24kHzVoice- – 1%THD+N,1.1W(Typ)
BandCodec • P atAV =3.3V, 8Ω
LS OUT DD
• PLLforOperationfromCommonSystem – 1%THD+N,570mW(Typ)
Clocks
• P atAV =5V&AV =3.3V, 32Ω
H/P OUT DD DD
• EitherI2CorSPICompatibleSerialInterface
– 1%THD+N,26mW(Typ)
• I2SDigitalAudioDataSerialInterface
• Supply VoltageRange
• PCMVoiceAudioDataSerialInterface
– DV ,2.7Vto4.0V
DD
• DifferentialAnalogMicrophoneInput
– AV ,2.7Vto5.0V(1)
DD
• 26mW/ChannelStereoHeadphoneAmplifier
• ShutdownCurrent,1.1µA
• 570mWMonoHighEfficiencyBTL8Ω
• PSRRat217Hz, AV =3V,62dB(Typ)
Amplifier DD
• SNR(VoiceCodec), 75dB(Typ)
• 32-stepVolumeControl forAudioOutput
• SNR(AudioDAC),86dB(Typ)
Amplifierswith1.5dBStepSize.
• Unity-GainStableHeadphoneAmplifiers
DESCRIPTION
• NoSnubberNetworksorBootstrapCapacitors
The LM4931 is an integrated audio subsystem that
areRequiredbytheHeadphoneorHands-Free supports voice and digital audio functions. The
Amplifiers LM4931 includes a high quality stereo DAC, voice
• AdjustableDigitalSide-ToneAttenuation band codec, a stereo headphone amplifier and a
high-power high efficiency mono speaker amplifier. It
• 16-stepVolumeControl forMicrophone
is primarily designed for demanding applications in
Preamp with2dBStepSize
mobilephonesandother portabledevices.
• Configurable GPIO/StatusPort
The LM4931 features an I2S serial interface for full
• Availableinthe42bumpDSBGAPackage
range audio, a 16-bit PCM bi-directional serial
interface for the voice band codec and an I2C/SPI
APPLICATIONS
compatible interface for control. The full range music
• 2.5and3GMobilePhonesand Multimedia path features an SNR of 86dB with an 18-bit 48kHz
input. The headphone amplifier delivers at least
Terminals
26mW to a 32Ω single-ended stereo load with
RMS
• PDAs,InternetAppliancesandPortable
less than 1% distortion (THD+N) when AV =
DD
Gaming 3.3V . The mono speaker amplifier delivers up to
DC
• PortableDVD/CD/AAC/MP3Players 570mW into an 8Ω load with less than 1%
RMS
distortionwhenAV =3.3V .
• DigitalCamerasand Toys DD DC
(1) Bestoperationisachievedbymaintaining3.0V≤AV ≤5.0
DD
and3.0V≤DV ≤3.6VandAV ≥DV .
DD DD DD
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof
TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
BoomerisatrademarkofTexasInstruments.
2
Allothertrademarksarethepropertyoftheirrespectiveowners.
3
PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©2004–2013,TexasInstrumentsIncorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarilyincludetestingofallparameters.
LM4931
SNAS251E–APRIL2004–REVISEDMAY2013 www.ti.com
DESCRIPTION (CONTINUED)
The LM4931 employs advanced techniques to reduce power consumption, to reduce controller overhead, 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
lowvoltageapplicationswhereminimalpowerconsumption,PCBarea, andcostareprimaryrequirements.
Typical Application
MODE MIC BIAS
ADDR/ENB I2C / SPI CONTROL REGISTERS CLICK and POP / BIAS MIC REF
SDA/SDI
SCL/SCK BYPASS
HP SENSE
MCLK
PLLIN PLL POWER MANAGEMENT GPIO
PLLOUT and CONTROL
MIC1
PCM_CLK
PPCCMM__SYSDNOC PCM ADC LPF AB
PCM_SDI DAC
MIXER
AB
I2S_CLK STEREO LPF
I2S_WS I2S
I2S_SDI DAC D
Figure1. TypicalI2S+Voicecodecapplicationcircuitformobilephones
Connection Diagram
6
5
4
3
2
1
A B C D E F G
Figure2. 42-BumpDSBGA
(TopView)
SeePackageNumber YZR0042
2 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated
ProductFolderLinks:LM4931
LM4931
www.ti.com SNAS251E–APRIL2004–REVISEDMAY2013
PINDESCRIPTIONS
PIN PINNAME D/A I/O DESCRIPTION
A1 MIC_P A I Microphonepositivedifferentialinput
A2 MIC_N A I Microphonenegativedifferentialinput
A3 VDD(MIC) A I AnalogVddformicrophonesection
A4 MODE D I SelectsbetweenSPIandI2Ccontrolinterfaces(I2C=0,SPI=1)
A5 SDA/SDI D I/O I2C_SDAorSPI_SDIdependingontheMODEcontrol
A6 NC N/A N/A NoConnect
B1 MIC_P A I Microphonepositivedifferentialinput
B2 MIC_BIAS A O 2Vultracleanpowersupplyformicrophones
B3 BYPASS A I ClickandPop/VDD/2referencefilter
B4 ADDR/ENB D I I2C_ADDRorSPI_ENBdependingontheMODEcontrol
B5 SCL/SCK D I I2C_SCLorSPI_SCKdependingontheMODEcontrol
B6 PCM_SDI D I PCM_SDIvoicedatainput
C1 VSS(MIC) A I AnalogVssformicrophonesection
C2 MIC_REF A I Filterformicrophonepowersupply
C3 NC N/A N/A NoConnect
C4 PCM_SDO D O PCM_SDOserialdataoutput
C5 PCM_SYNC D I/O PCM_SYNCpulseforthePCMbus
C6 PCM-CLK D I/O PCM_SYNCpulseforthePCMbus
D1 HPL A O LeftHeadphoneoutput
D2 VSS(HP) A I AnalogVssforHeadphoneandMixersections
D3 VSS(HP) A I AnalogVssforHeadphoneandMixersections
D4 I2S_SDI D I I2Sserialdatainput
D5 I2S_CLK D I/O I2Sclocksignal
D6 VSSD D I DigitalVss
E1 VDD(HP) A I AnalogVddforHeadphoneandMixersections
E2 HPR A O RightHeadphoneoutput
E3 GPIO D O Configurablemultipurposeoutput
E4 I2S_WS D I/O I2Swordselectsignal
E5 MCLK D I Inputclockfrom10MHz-24.576MHz
E6 VDDD D I DigitalVdd
F1 LS+ A O Loudspeakerpositiveoutput
F2 VDD(LS) A I AnalogVddforLoudspeakersection
F3 HP_SENSE A I Inputforheadphoneconnectionsensecircuit
F4 NC N/A N/A NoConnect
F5 PLL_OUT D O PLLfilteroutput
F6 VDD(PLL) D I DigitalVddforPLLsection
G1 LS+ A O Loudspeakerpositiveoutput
G2 VSS(LS) A I AnalogVssforLoudspeakersection
G3 LS- A O Loudspeakernegativeoutput
G4 VSS(PLL) D I DigitalVssforPLLsection
G5 PLL_IN D I PLLfilterinput
G6 VDD(PLL) D I DigitalVddforPLLsection
Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam
duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates.
Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3
ProductFolderLinks:LM4931
LM4931
SNAS251E–APRIL2004–REVISEDMAY2013 www.ti.com
Absolute Maximum Ratings(1)(2)
AnalogSupplyVoltage 6.0V
DigitalSupplyVoltage 6.0V
StorageTemperature -65°Cto+150°C
PowerDissipation(3) InternallyLimited
ESDSusceptibility HumanBodyModel(4) 2500V
MachineModel(5) 200V
JunctionTemperature 150°C
ThermalResistance θ -YZR0042 105°C/W
JA
(1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsfor
whichthedeviceisfunctionalbutdonotensurespecificperformancelimits.ElectricalCharacteristicsstateDCandACelectrical
specificationsunderparticulartestconditionswhichensurespecificperformancelimits.Thisassumesthatthedeviceiswithinthe
OperatingRatings.Specificationsarenotensuredforparameterswherenolimitisgiven,however,thetypicalvalueisagoodindication
ofdeviceperformance.
(2) AllvoltagesaremeasuredwithrespecttotherelevantGNDpinunlessotherwisespecified.Allgroundsshouldbecoupledascloseas
possibletothedevice.
(3) ThemaximumpowerdissipationmustbederatedatelevatedtemperaturesandisdictatedbyT ,θ ,andtheambienttemperature,
JMAX JA
T .ThemaximumallowablepowerdissipationisP =(T –T )/θ orthenumbergiveninAbsoluteMaximumRatings,
A DMAX JMAX A JA
whicheverislower.FortheLM4931,seepowerderatingcurrentsformoreinformation.
(4) Humanbodymodel:100pFdischargedthrougha1.5kΩresistor.
(5) Machinemodel:220pF-240pFdischargedthroughallpins.
Operating Ratings
TemperatureRange T ≤T ≤T −40°C≤T ≤+85°C
MIN A MAX A
DV (1) 2.7V-4.0V
DD
SupplyVoltage
AV (1) 2.7V-5.0V
DD
(1) Bestoperationisachievedbymaintaining3.0V≤AV ≤5.0and3.0V≤DV ≤3.6VandAV ≥DV .
DD DD DD DD
Electrical Characteristics DV = 3V, AV = 3V, R = 32Ω, R = 8Ω(1)(2)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure62,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
Power
Mode0
DI DigitalShutdownCurrent f =12MHz(5) 400 500 μA(max)
SD MLCK
NoMCLK 1 2 μA(max)
DI DigitalStandbyCurrent Mode1,f =12MHz 400 1200 μA(max)
ST MCLK
f =12MHz
MLCK
Mode2,3,4 1.3 3.2 mA(max)
DI DigitalPowerSupplyCurrent
DD
Mode5,6,7 2.8 7 mA(max)
Mode8,9,10 3.2 7.5 mA(max)
PLLI PLLQuiescentCurrent f =12MHz 2.8 3.5 mA(max)
DD MCLK
AI AnalogShutdownCurrent Mode0,Noload 0.1 2.5 μA(max)
SD
AI AnalogStandbyCurrent Mode1,Noload 100 200 μA(max)
ST
(1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsfor
whichthedeviceisfunctionalbutdonotensurespecificperformancelimits.ElectricalCharacteristicsstateDCandACelectrical
specificationsunderparticulartestconditionswhichensurespecificperformancelimits.Thisassumesthatthedeviceiswithinthe
OperatingRatings.Specificationsarenotensuredforparameterswherenolimitisgiven,however,thetypicalvalueisagoodindication
ofdeviceperformance.
(2) AllvoltagesaremeasuredwithrespecttotherelevantGNDpinunlessotherwisespecified.Allgroundsshouldbecoupledascloseas
possibletothedevice.
(3) Typicalsaremeasuredat25°Candrepresenttheparametricnorm.
(4) LimitsareensuredtoTI’sAOQL(AverageOutgoingQualityLevel).
(5) DigitalshutdowncurrentismeasuredwithsystemclocksetforPLLoutputwhilethePLLisdisabled.
4 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated
ProductFolderLinks:LM4931
LM4931
www.ti.com SNAS251E–APRIL2004–REVISEDMAY2013
Electrical Characteristics DV = 3V, AV = 3V, R = 32Ω, R = 8Ω(1)(2) (continued)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure62,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
NoLoad
Mode2 7.8 19 mA(max)
Mode3 5.3 10 mA(max)
AnalogPowerSupplyQuiescent Mode4 8.6 15 mA(max)
AI
DD Current Mode5 8.4 15 mA(max)
Mode6 6.0 15 mA(max)
Mode7 9.2 15 mA(max)
Mode8,9,10 10.1 16 mA(max)
LoudspeakerAmplifier
V Full-ScaleOutputVoltage 8Ωload,0dBgainsetting
FS 2.6 V
LoudspeakerAmplifier) P-P
THD+N TotalHarmonicDistortion+Noise f =1kHz,P =200mW 0.4 %
OUT OUT
P LoudspeakerAmplifierOutputPower THD=1%(max),f =1kHz 470 350 mW(min)
OLS OUT
C =1.0μF
PowerSupplyRejectionRatio B
PSRR V =200mV 54 dB
(LoudspeakerAmplifier) RIPPLE P-P
f =217Hz
RIPPLE
SNR(Voice) Signal-to-NoiseRatioofVoice Signal=V at0dBFS,f=1kHz,
O
Channel(LoudspeakerAmplifier) Noise=digitalzero,A-weighted,
0dBgainsetting(6)
f =12.288MHz,PLLdisabled 71 dB
MCLK
f =12MHz,PLLactive 70 dB
MCLK
Signal=V at0dBFS,f=1kHz,
O
Noise=digitalzero,A-weighted,
Signal-to-NoiseRatioofMusic
0dBgainsetting(6)
SNR(Music) Channel(LoudspeakerAmplifier)
OutputNoise f =12.288MHz,PLLdisabled 78 dB
MCLK
f =12MHz,PLLactive 76 dB
MCLK
A-weightedfilter,V =digitalzero(7)
in
e (Music) OutputNoise f =12.288MHz,PLLdisabled 120 μV
N MCLK
f =12MHz,PLLactive 140 μV
MCLK
V OffsetVoltage 10 mV
OS
VolumeControlRange(Loudspeaker MinimumGain –34.5 dB
VCR
Amplifier) MaximumGain 12 dB
SS VolumeControlStepSize 1.5 dB
(LoudspeakerAmplifier)
HeadphoneAmplifier
V FullScaleOuputVoltage 32Ωload,0dBgainsetting 2.6 V
FS P-P
(HeadphoneAmplifier)
THD+N TotalHarmonicDistortion+Noise f =1kHz,P =7.5mW, 0.04 %
IN OUT
(HeadphoneAmplifier) 32Ωstereoload
P OutputPower(HeadphoneAmplifier) THD=0.5%,f =1KHz 26 19 mW(min)
OHP OUT
PSRR PowerSupplyRejectionRatio C =1.0μF 62 dB
B
(HeadphoneAmplifier) V =200mV
RIPPLE PP
f =217Hz
RIPPLE
(6) DisablingorbypassingthePLLwillresultinanimprovementinnoisemeasurements.
(7) DisablingorbypassingthePLLwillresultinanimprovementinnoisemeasurements.
Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5
ProductFolderLinks:LM4931
LM4931
SNAS251E–APRIL2004–REVISEDMAY2013 www.ti.com
Electrical Characteristics DV = 3V, AV = 3V, R = 32Ω, R = 8Ω(1)(2) (continued)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure62,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
Signal=V at0dBFS,f=1kHzand1%
O
THD+N,
Noise=digitalzero,A-weighted,
Signal-to-NoiseRatioofVoice
SNR(Voice) 0dBgainsetting(7)
Channel(HeadphoneAmplifier)
f =12.288MHz,PLLdisabled 75 dB
MCLK
f =12MHz,PLLactive 73 dB
MCLK
Signal=V at0dBFS,f=1kHzand1%
O
THD+N,
Noise=digitalzero,A-weighted,
Signal-to-NoiseRatioofMusic
SNR(Music) 0dBgainsetting(7)
Channel(HeadphoneAmplifier)
f =12.288MHz,PLLdisabled 86 dB
MCLK
f =12MHz,PLLactive 82 dB
MCLK
X StereoChannel-to-ChannelCrosstalk f =48kHz, 62 dB
TALK S
f =1kHzsinewaveat–3dBFS
IN
ΔA StereoChannel-to-ChannelGain 0.3 dB
CH-CH
Mismatch
A-weightedfilter,
Vin=digitalzero(7)
e (Music) OutputNoise
N f =12.288MHz,PLLdisabled 45 μV
MCLK
f =12MHz,PLLactive 65 μV
MCLK
VolumeControlRange(Headphone MinimumGain –46.5 dB
VCR
Amplifier) MaximumGain 0 dB
SS VolumeControlStepsize(Headphone 1.5 dB
Amplifier)
MicrophoneAmplifier
V MicBiasVoltage 2 V
BIAS
GainControlRange(Microphone MinimumGain 6 dB
GCR
Amplifier) MaximumGain 36 dB
SS GainControlStepsize(Microphone 2 dB
Amplifier)
VoiceCodec(Typicalnumbersarewith1.024MHzvoiceclockand8kHzsamplingfrequency)
R VoiceDACRipple 300Hz-3.3kHzthroughheadphoneoutput. +/-0.15 dB
VDAC
R VoiceADCRipple 300Hz-3.3kHzthroughheadphoneoutput. +/-0.25 dB
VADC
PB VoiceDACPassband –3dBPoint 3.46 kHz
VDAC
SBA VoiceDACStopbandAttenuation Above4kHz 72 dB
VDAC
UPB UpperPassbandCutoffFrequency Upper–3dBPoint 3.47 kHz
VDAC
LPB LowerPassbandCutoffFrequency Lower–3dBPoint 0.230 kHz
VDAC
SBA VoiceADCStopbandAttenuation Above4kHz 65 dB
VADC
SBA VoiceADCNotchAttenuation Centeredon55Hz,figuregivesworstcase 58 dB
NOTCH
attenuationfor50Hz&60Hz
Signal=V at0dBFS,f=1kHzand1%
O
THD+N,
MIC_P,MIC_NTerminatedtoground,
Signal-to-NoiceRatioofVoice
SNR(Voice) A-weighted,36dBMICPreampgainsetting(8)
Channel(VoiceADCpath)
f =12.288MHz,PLLdisabled 81 dB
MCLK
f =12MHz,PLLactive 80 dB
MCLK
MinimumGain –30 dB
STR SideToneRange
MaximumGain 0 dB
(8) DisablingorbypassingthePLLwillresultinanimprovementinnoisemeasurements.
6 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated
ProductFolderLinks:LM4931
LM4931
www.ti.com SNAS251E–APRIL2004–REVISEDMAY2013
Electrical Characteristics DV = 3V, AV = 3V, R = 32Ω, R = 8Ω(1)(2) (continued)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure62,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
SS SideToneStepSize 3 dB
AudioDAC(Typicalnumbersarewith6.144MHzaudioclockand48kHzsamplingfrequency)
R AudioDACRipple 20Hz–20kHzthroughheadphoneoutput +/-0.1 dB
DAC
PB AudioDACPassbandwidth –3dBpoint 22.7 kHz
DAC
SBA AudioDACStopbandAttenuation Above24kHz 76 dB
DAC
DR AudioDACDynamicRange DC–20kHz 97 dB
DAC
SNR AudioDACSNRDigitalFilterSection DC–20kHz 97 dB
DAC
PLL
f InputFrequencyonMCLKpin 12 10 MHz(min)
IN
25 MHz(max)
SPI/I2C
f MaximumSPIFrequency 400 4000 kHz(max)
SPI
t SPIDataSetupTime 100 ns(min)
SPISETD
t SPIENBSetupTime 100 ns(min)
SPISETENB
t SPIDataHoldTime 100 ns(min)
SPIHOLDD
t SPIENBHoldTime 100 ns(min)
SPIHOLDENB
t SPIClockLowTime 500 ns(min)
SPICL
t SPIClockHighTime 500 ns(min)
SPICH
t SPIClockTransitionTime 5 ns(min)
SPIT
f I2C_CLKFrequency 400 3400 kHz(max)
CLKI2C
t I2C_DATAHoldTime 100 ns(min)
I2CHOLD
t I2C_DATASetupTime 100 ns(min)
I2CSET
PCM/I2S
f PCM_CLKFrequency 128 kHz
CLKPCM
PCM_CLKDutyCycle 50 40 %(min)
60 %(max)
I2S_CLKFrequency I2S_RES=0 1536 kHz
f I2S_RES=1 3072 kHz
CLKI2S
I2S_WSDutyCycle 50 40 %(min)
60 %(max)
Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7
ProductFolderLinks:LM4931
LM4931
SNAS251E–APRIL2004–REVISEDMAY2013 www.ti.com
Electrical Characteristics DV = 3.3V, AV = 5V, R = 32Ω, R = 8Ω(1)(2)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure1,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
Power
Mode0
DI DigitalShutdownCurrent f =12MHz(5) 500 600 μA(max)
SD MCLK
NoMCLK 1 μA(max)
DI DigitalStandbyCurrent Mode1,f =12MHz 500 1600 μA(max)
ST MCLK
f =12MHz
MCLK
Mode2,3,4 1.6 3.5 mA(max)
DI DigitalPowerSupplyCurrent
DD
Mode5,6,7 3.5 8 mA(max)
Mode8,9,10 4.0 8 mA(max)
PLLI PLLQuiescentCurrent f =12MHz 3.3 4 mA(max)
DD MCLK
AI AnalogShutdownCurrent Mode0,NoLoad 0.6 3 μA(max)
DD
AI AnalogStandbyCurrent Mode1,NoLoad 220 450 μA(max)
ST
NoLoad
Mode2 18.5 32 mA(max)
Mode3 7.3 12 mA(max)
AnalogPowerSupplyQuiescent Mode4 19.6 29 mA(max)
AI
DD Current Mode5 19.4 30 mA(max)
Mode6 8.4 26 mA(max)
Mode7 20.5 30 mA(max)
Mode8,9,10 22 32 mA(max)
LoudspeakerAmplifier
V Full-ScaleOutputVoltage(Mono 8Ωload,0dBgainsetting
FS 2.6 V
speakeramplifie)r P-P
THD+N TotalHarmonicDistortion+Noise f =1kHz,P =400mW 0.16 %
OUT OUT
P LoudspeakerAmplifierOutputPower THD=1%,f =1kHz 1.1 W
OLS OUT
PSRR PowerSupplyRejectionRatio C =1.0µF 56 dB
B
(LoudspeakerAmplifier) V =200mV
RIPPLE PP
f =217Hz
RIPPLE
Signal=V at0dBFS,f=1kHz
O
Noise=digitalzero,A-weighted
Signal-to-NoiseRatioofVoice 0dBgainsetting(6)
SNR(Voice)
Channel(LoudspeakerAmplifier)
f =12.288MHz,PLLdisabled 70 dB
MCLK
f =12MHz,PLLactive 69 dB
MCLK
Signal=V at0dBFS,f=1kHz
O
Noise=digitalzero,A-weighted
Signal-to-NoiseRatioofMusic 0dBgainsetting(6)
SNR(Music)
Channel(LoudspeakerAmplifier)
f =12.288MHz,PLLdisabled 74 dB
MCLK
f =12MHz,PLLactive 73 dB
MCLK
(1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsfor
whichthedeviceisfunctionalbutdonotensurespecificperformancelimits.ElectricalCharacteristicsstateDCandACelectrical
specificationsunderparticulartestconditionswhichensurespecificperformancelimits.Thisassumesthatthedeviceiswithinthe
OperatingRatings.Specificationsarenotensuredforparameterswherenolimitisgiven,however,thetypicalvalueisagoodindication
ofdeviceperformance.
(2) AllvoltagesaremeasuredwithrespecttotherelevantGNDpinunlessotherwisespecified.Allgroundsshouldbecoupledascloseas
possibletothedevice.
(3) Typicalsaremeasuredat25°Candrepresenttheparametricnorm.
(4) LimitsareensuredtoTI’sAOQL(AverageOutgoingQualityLevel).
(5) DigitalshutdowncurrentismeasuredwithsystemclocksetforPLLoutputwhilethePLLisdisabled.
(6) DisablingorbypassingthePLLwillresultinanimprovementinnoisemeasurements.
8 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated
ProductFolderLinks:LM4931
LM4931
www.ti.com SNAS251E–APRIL2004–REVISEDMAY2013
Electrical Characteristics DV = 3.3V, AV = 5V, R = 32Ω, R = 8Ω(1)(2) (continued)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure1,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
A-Weightedfilter,V =digitalzero(6)
IN
e (Music) OutputNoise f =12.288MHz,PLLdisabled 250 μV
N MCLK
f =12MHz,PLLactive 320 μV
MCLK
V OffsetVoltage 10 mV
OS
VolumeControlRange(Loudspeaker MinimumGain –34.5 dB
VCR
Amplifier) MaximumGain 12 dB
SS VolumeControlStepSize 1.5 dB
HeadphoneAmplifier
V Full-ScaleOutputVoltage 32Ωstereoload,0dBgainsetting 2.6 V
FS P-P
(HeadphoneAmplifier)
THD+N TotalHarmonicDistortion+Noise f =1kHz,P =7.5mW 0.05 %
IN OUT
(HeadphoneAmplifier) 32Ωstereoload
P OutputPower(HeadphoneAmplifier) THD=0.5%,f =1kHz 26 20 mW(min)
OHP OUT
PSRR PowerSupplyRejectionRatio C =1.0μF 70 dB
B
(HeadphoneAmplifier) V =200mV
RIPPLE PP
f =217Hz
RIPPLE
Signal=V atf=1kHzand1%THD+N,
O
Noise=digitalzero,A-weighted
Signal-to-NoiseRatioofVoice 0dBgainsetting(6)
SNR(Voice)
Channel(HeadphoneAmplifier)
f =12.288MHz,PLLdisabled 75 dB
MCLK
f =12MHz,PLLactive 73 dB
MCLK
Signal=V atf=1kHzand1%THD+N,
O
Noise=digitalzero,A-weighted
Signal-to-NoiseRatioofMusic 0dBgainsetting(7)
SNR(Music)
Channel(HeadphoneAmplifier)
f =12.288MHz,PLLdisabled 86 dB
MCLK
f =12MHz,PLLactive 82 dB
MCLK
X StereoChannel-to-ChannelCrosstalk f =48kHz 62 dB
TALK S
f =1kHzsinewaveat–3dBFS
IN
StereoChannel-to-ChannelGain
ΔA 0.3 dB
CH-CH Mismatch
A-Weightedfilter
V =digitalzero(7)
IN
e (Music) OutputNoise
N f =12.288MHz,PLLdisabled 45 μV
MCLK
f =12MHz,PLLactive 70 μV
MCLK
VolumeControlRange(Headphone MinimumGain -46.5 dB
VCR
Amplifier) MaximumGain 0 dB
SS VolumeControlStepSize 1.5 dB
(HeadphoneAmplifier)
MicrophoneAmplifier
V MicBiasVoltage 2 V
BIAS
GainControlRange(Microphone MinimumGain 6 dB
GCR
Amplifier) MaximumGain 36 dB
SS GainControlStepSize 2 dB
VoiceCodec(Typicalnumbersarewith1.024MHzvoiceclockand8kHzsamplingfrequency
R VoiceDACRipple 300Hz-3.3kHzthroughheadphoneoutput +/-0.15 dB
VDAC
R VoiceADCRipple 300Hz-3.3kHzthroughheadphoneoutput +/-0.25 dB
VADC
PB VoiceDACPassband –3dBPoint 3.46 kHz
VDAC
(7) DisablingorbypassingthePLLwillresultinanimprovementinnoisemeasurements.
Copyright©2004–2013,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9
ProductFolderLinks:LM4931
LM4931
SNAS251E–APRIL2004–REVISEDMAY2013 www.ti.com
Electrical Characteristics DV = 3.3V, AV = 5V, R = 32Ω, R = 8Ω(1)(2) (continued)
DD DD LHP LHF
ThefollowingspecificationsapplyforthecircuitshowninFigure1,unlessotherwisespecified.LimitsapplyforT =25°C.
A
Symbol Parameter Conditions LM4931 Units
Typical(3 Limits(4) (Limits)
)
SBA VoiceDACStopbandAttenuation Above4kHz 72 dB
VDAC
UPB UpperPassbandCutoffFrequency Upper–3dBPoint 3.47 kHz
VADC
LPB LowerPassbandCutoffFrequency Lower–3dBPoint 0.230 kHz
VADC
SBA VoiceADCStopbandAttenuation Above4kHz 65 dB
VADC
SBA VoiceADCNotchAttenuation Centeredon55Hz,figuregivesworstcase 58 dB
NOTCH
attenuationfor50Hz&60Hz
Signal=V atf=1kHzand1%THD+N,
O
MIC_P,MIC_Nterminatedtoground,
Signal-to-NoiseRatioofVoice A-weighted,36dBMICPreampgainsetting(7)
SNR(Voice)
Channel(VoiceADCpath)
f =12.288MHz,PLLdisabled 83 dB
MCLK
f =12MHz,PLLactive 81 dB
MCLK
Minimum –30 dB
STR SideToneRange
Maximum 0 dB
SS SideToneStepSize 3 dB
AudioDAC(Typicalnumbersarewith6.144MHzaudioclockand48kHzsamplingfrequency)
R AudioDACRipple 20Hz–20kHzthroughheadphoneoutput +/-0.1 dB
DAC
PB AudioDACPassbandwidth –3dBpoint 22.7 kHz
DAC
SBA AudioDACStopbandAttenuation Above24kHz 76 dB
DAC
DR AudioDACDynamicRange DC–20kHz 97 dB
DAC
SNR AudioDACSNRDigitalFilterSection DC–20kHz 97 dB
DAC
PLL
f 10 MHz(min)
IN InputFrequencyonMCLKpin 12
20 MHz(max)
SPI/I2C
f MaximumSPIFrequency 400 4000 kHz(max)
SPI
t SPIDataSetupTime 100 ns(min)
SPISETD
t SPIENBSetupTime 100 ns(min)
SPISETENB
t SPIDataHoldTime 100 ns(min)
SPISETHOLDD
t SPIENBHoldTime 100 ns(min)
SPIHOLDENB
t SPIClockLowTime 500 ns(min)
SPICL
t SPIClockHighTime 500 ns(min)
SPICH
t SPIClockTransitionTime 5 ns(min)
SPIT
t I2C_CLKFrequency 400 3400 kHz(max)
CLKI2C
t I2C_DATAHoldTime 100 ns(min)
I2CHOLD
t I2C_DATASetupTime 100 ns(min)
I2CSET
PCM/I2S
f PCM_CLKFrequency 128 kHz
CLKPCM
40 %(min)
PCM_CLKDutyCycle 50
60 %(max)
fCLKI2S I2S_CLKFrequency II22SS__RREESS==01 13503762 kHz
I2S_WSDutyCycle 50 40 %(min)
60 %(max)
10 SubmitDocumentationFeedback Copyright©2004–2013,TexasInstrumentsIncorporated
ProductFolderLinks:LM4931