High-Performance, 2-Ch, 24-Bit, 216kHz Sampling Multi-Bit Delta-Sigma ADC

37 Pages·2015·0.99 MB·English

PCM4220
PCM4220
www.ti.com............................................................................................................................................. SBAS407C–DECEMBER2006–REVISEDAUGUST2009
High-Performance, Two-Channel, 24-Bit, 216kHz Sampling
Multi-Bit Delta-Sigma Analog-to-Digital Converter
FEATURES • Digital High-PassFiltering RemovesDCOffset
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• SupportsLinearPCMOutputData – Left andRight ChannelFiltersMayBe
234
– Output SamplingRatesfrom8kHzto DisabledIndependently
216kHz • AudioSerial PortInterface
• DifferentialVoltageInputs – Master orSlaveModeOperation
• On-ChipVoltageReferenceImproves – Supports Left-Justified,I2S™,andTDM
Power-SupplyNoiseRejection DataFormats
• DynamicPerformance(24-bitwordlength) • OutputWordLengthReduction
– DynamicRange(–60dBinput,A-weighted): • Overflow Indicatorsfor theLeftandRight
123dB typical Channels
– DynamicRange(–60dBinput,20kHz • AnalogPowerSupply:
bandwidth):121dBtypical +4.0Vnominal
– TotalHarmonicDistortion+Noise • Digital PowerSupply:
(–1dBinput,20kHzbandwidth): +3.3Vnominal
–108dB typical • Power-DownMode:4mWtypical
– ChannelSeparation:135dB • Package: TQFP-48,RoHScompliant
• LowPowerDissipation:
APPLICATIONS
– 305mWtypicalfor48kHzsamplingrate
• Digital AudioRecorders and
– 330mWtypicalfor96kHzsamplingrate
MixingDesks
– 340mWtypicalfor192kHzsamplingrate
• Digital LiveSoundConsoles
• LinearPhaseDigitalDecimationFiltering
• Digital AudioEffects Processors
– SelectfromClassicor LowGroupDelay • SurroundSoundEncoders
FilterResponses
• BroadcastStudioEquipment
– LowPassbandRipple • DataAcquisitionand
Classic:±0.00015dB
MeasurementSystems
LowGroupDelay:±0.001dB
• AudioTestSystems
blank • Sonar
blank
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
WindowsisaregisteredtrademarkofMicrosoftCorporation.
2
I2SisatrademarkofNXPSemiconductor.
3
Allothertrademarksarethepropertyoftheirrespectiveowners.
4
PRODUCTIONDATAinformationiscurrentasofpublicationdate. Copyright©2006–2009,TexasInstrumentsIncorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarilyincludetestingofallparameters.
PCM4220
SBAS407C–DECEMBER2006–REVISEDAUGUST2009............................................................................................................................................. www.ti.com
DESCRIPTION
The PCM4220 is a high-performance, two-channel analog-to-digital (A/D) converter designed for use in
professional audio applications. Offering outstanding dynamic performance, the PCM4220 provides 24-bit linear
PCM output data, with support for output word length reduction to 20-, 18-, or 16-bits. The PCM4220 includes
three sampling modes, supporting output sampling rates from 8kHz to 216kHz. The PCM4220 is ideal for a
varietyofdigitalaudiorecordingandprocessingapplications.
Alinearphasedigitaldecimation filtering engine supports Classic and Low Group Delay filter responses, allowing
optimization for either studio or live sound applications. In addition, digital high-pass filtering is provided for DC
offset removal. The The PCM4220 is configured using dedicated control pins for selection of sampling modes,
audio data formats and word length, decimation filter response, high-pass filter disable, and reset/power-down
functions.
While providing uncompromising performance, the PCM4220 addresses power concerns with just over 300mW
typical total power dissipation, making the device suitable for multi-channel audio systems. The PCM4220 is
typically powered from a +4.0V analog supply and a +3.3V digital supply. The digital I/O is logic-level compatible
with common digital signal processors, digital interface transmitters, and programmable logic devices. The
PCM4220is availableinaTQFP-48package,whichisRoHS-compliant.
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriateprecautions.Failuretoobserveproperhandlingandinstallationprocedurescancausedamage.
ESDdamagecanrangefromsubtleperformancedegradationtocompletedevicefailure.Precisionintegratedcircuitsmaybemore
susceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.
ORDERINGINFORMATION
Forthemostcurrentpackageandorderinginformation,seethe PackageOption Addendumat theendof this
datasheet, orseetheTIwebsiteatwww.ti.com
ABSOLUTE MAXIMUM RATINGS(1)
Overoperatingfree-airtemperaturerange,unlessotherwisenoted.
VALUE
Powersupplies
VCC1,VCC2 –0.3Vto+6.0V
VDD –0.3Vto+4.0V
Digitalinputvoltage
AlldigitalinputandI/Opins –0.3V<(VDD+0.3V)<+4.0V
Analoginputvoltage
VINL+,VINL–,VINR+,VINR– –0.3V<(VCC+0.3V)<+6.0V
Inputcurrent(allpinsexceptpowerandground) ±10mA
Ambientoperatingtemperature –40°Cto+85°C
Storagetemperature –65°Cto+150°C
(1) Theselimitsarestressratingsonly.Stressesbeyondtheselimitsmayresultinpermanentdamage.Extendedexposuretoabsolute
maximumratingsmaydegradedevicereliability.Normaloperationorperformanceatorbeyondtheselimitsisnotspecifiedorensured.
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PCM4220
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ELECTRICAL CHARACTERISTICS: DIGITAL AND DYNAMIC PERFORMANCE
AllspecificationsareatT =+25°C,VCC1=VCC2=+4.0V,andVDD=+3.3V,unlessotherwisenoted.
A
PCM4220
PARAMETER CONDITIONS MIN TYP MAX UNIT
DIGITALI/OCHARACTERISTICS
(Appliestoalldigitalpins)
High-levelinputvoltage,VIH 0.7×VDD VDD V
Low-levelinputvoltage,VIL 0 0.3×VDD V
High-levelinputcurrent,IIH 1 10 m A
Low-levelinputcurrent,IIL 1 10 m A
High-leveloutputvoltage,VOH IO=–2mA 0.8×VDD VDD V
Low-leveloutputvoltage,VOL IO=+2mA 0 0.2×VDD V
Inputcapacitance,CIN 3 pF
PCMOUTPUTSAMPLINGRATE,fS
Normalmode 8 54 kHz
DoubleSpeedmode 54 108 kHz
QuadSpeedmode 108 216 kHz
MASTERCLOCKINPUT
Normalmode,MCKI=256fS 2.048 13.824 MHz
DoubleSpeedmode,MCKI=128fS 6.912 13.824 MHz
QuadSpeedmode,MCKI=64fS 6.912 13.824 MHz
DYNAMICPERFORMANCE(1)
PCMOutput,NormalMode,fS=48kHz BW=22Hzto20kHz
Totalharmonicdistortion+noise(THD+N) f=997Hz,–1dBinput –108 –100 dB
f=997Hz,–20dBinput –100 dB
f=997Hz,–60dBinput –61 dB
Dynamicrange,noweighting f=997Hz,–60dBinput 121 dB
Dynamicrange,A-weighted f=997Hz,–60dBinput 118 123 dB
Channelseparation f=10kHz,–1dBinput 115 135 dB
PCMOutput,DoubleSpeedMode,fS=96kHz BW=22Hzto40kHz
Totalharmonicdistortion+noise(THD+N) f=997Hz,–1dBinput –108 dB
f=997Hz,–20dBinput –98 dB
f=997Hz,–60dBinput –58 dB
Dynamicrange,noweighting f=997Hz,–60dBinput 118 dB
Dynamicrange,A-weighted f=997Hz,–60dBinput 123 dB
Channelseparation f=10kHz,–1dBinput 135 dB
PCMOutput,QuadSpeedMode,fS=192kHz BW=22Hzto40kHz
Totalharmonicdistortion+noise(THD+N) f=997Hz,–1dBinput –107 dB
f=997Hz,–20dBinput –98 dB
f=997Hz,–60dBinput –58 dB
Dynamicrange,noweighting f=997Hz,–60dBinput 118 dB
Dynamicrange,A-weighted f=997Hz,–60dBinput 123 dB
Channelseparation f=10kHz,–1dBinput 135 dB
PCMOutput,QuadSpeedMode,fS=192kHz BW=22Hzto80kHz
Totalharmonicdistortion+noise(THD+N) f=997Hz,–1dBinput –106 dB
f=997Hz,–20dBinput –91 dB
f=997Hz,–60dBinput –52 dB
Dynamicrange,noweighting f=997Hz,–60dBinput 112 dB
Dynamicrange,A-weighted f=997Hz,–60dBinput 123 dB
Channelseparation f=10kHz,–1dBinput 135 dB
(1) TypicalPCMoutputperformanceismeasuredandcharacterizedwithanAudioPrecisionSYS-2722192kHztestsystemanda
PCM4222EVMevaluationmodulemodifiedforusewiththePCM4220.Measurementbandwidthandweightingsettingsarenotedinthe
ParameterandConditionscolumns.THD+Nismeasuredwithouttheuseofweightingfilters.Mastermodeoperationisutilizedforall
typicalperformanceparameters,withthemasterclockinputfrequency(MCKI)setto12.288MHz.
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ELECTRICAL CHARACTERISTICS: DIGITAL AND DYNAMIC PERFORMANCE (continued)
AllspecificationsareatT =+25°C,VCC1=VCC2=+4.0V,andVDD=+3.3V,unlessotherwisenoted.
A
PCM4220
PARAMETER CONDITIONS MIN TYP MAX UNIT
DigitalDecimationFilterCharacteristics:
ClassicResponse
Passband 0.4535×fS Hz
Passbandripple ±0.00015 dB
Stopband 0.5465×fS Hz
Stopbandattenuation –100 dB
Groupdelay 39/fS Seconds
DigitalDecimationFilterCharacteristics:
LowGroupDelayResponse
Passband 0.4167×fS Hz
Passbandripple ±0.001 dB
Stopband 0.5833×fS Hz
Stopbandattenuation –90 dB
Groupdelay 21/fS Seconds
DigitalHigh-PassFilterCharacteristics
–3dBcornerfrequency High-passfilterenabled fS/48000 Hz
ELECTRICAL CHARACTERISTICS: ANALOG INPUTS, OUTPUTS, AND DC ERROR
AllspecificationsareatT =+25°C,VCC1=VCC2=+4.0V,andVDD=+3.3V,unlessotherwisenoted.
A
PCM4220
PARAMETER CONDITIONS MIN TYP MAX UNIT
ANALOGINPUTS
Full-scaleinputrange
Differentialinput ReferencedfromVINL+toVINL–,orVINR+to 5.6 VPP
VINR–
Perinputpin AppliestoVINL+,VINL–,VINR+,orVINR– 2.8 VPP
Inputimpedance AppliestoVINL+,VINL–,VINR+,orVINR– 2.8 kΩ
Common-moderejection 100 dB
ANALOGOUTPUTS
Common-modeoutputvoltage
Leftchannel,VCOML MeasuredfromVCOMLtoAGND 0.4875×VCC2 V
Rightchannel,VCOMR MeasuredfromVCOMRtoAGND 0.4875×VCC1 V
Common-modeoutputcurrent AppliestoVCOMLorVCOMR 200 m A
DCERROR
Outputoffseterror Digitalhigh-passfilterdisabled 3 mV
Offsetdrift Digitalhigh-passfilterdisabled 3.5 m V/°C
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ELECTRICAL CHARACTERISTICS: POWER SUPPLIES
AllspecificationsareatT =+25°C,VCC1=VCC2=+4.0V,VDD=+3.3V,andMCKI=12.288MHz,unlessotherwisenoted.
A
PCM4220
PARAMETER CONDITIONS MIN TYP MAX UNIT
POWERSUPPLIES
Recommendedsupplyvoltagerange
VCC1,VCC2 0°C<TA≤+85°C +3.8 +4.0 +4.2 V
VCC1,VCC2 –40°C≤TA≤0°C +3.9 +4.0 +4.2 V
VDD –40°C≤TA≤+85°C +2.4 +3.3 +3.6 V
Supplycurrent:power-down RST(pin36)heldlowwithnoclocksapplied
ICC1+ICC2 VCC1=VCC2=+4.0V 600 m A
IDD VDD=+3.3V 325 m A
Supplycurrent:fS=48kHz
ICC1+ICC2 VCC1=VCC2=+4.0V 65 75 mA
IDD VDD=+3.3V 14 18 mA
Supplycurrent:fS=96kHz
ICC1+ICC2 VCC1=VCC2=+4.0V 65 mA
IDD VDD=+3.3V 21 mA
Supplycurrent:fS=192kHz
ICC1+ICC2 VCC1=VCC2=+4.0V 65 mA
IDD VDD=+3.3V 24 mA
Totalpowerdissipation:power-down 3.5 mW
Totalpowerdissipation:fS=48kHz 305 360 mW
Totalpowerdissipation:fS=96kHz 330 mW
Totalpowerdissipation:fS=192kHz 340 mW
ELECTRICAL CHARACTERISTICS: AUDIO INTERFACE TIMING
AllspecificationsareatT =+25°C,VCC1=VCC2=+4.0V,andVDD=+3.3V,unlessotherwisenoted.
A
PCM4220
PARAMETER CONDITIONS MIN TYP MAX UNIT
AUDIOSERIALPORT
LRCKperiod,tLRCKP Alldataformats 4.62 125 m s
LRCKhigh/lowtime,tLRCKHL
Left-Justified,I2S,andTDMMastermode 0.45×tLRCKP 0.55×tLRCKP m s
formats
TDMslavemodeformats tBCKP 0.55×tLRCKP m s
BCKperiod,tBCKP Left-JustifiedandI2Sdataformats
Normalsamplingmode tLRCKP/128 ns
DoubleSpeedsamplingmode tLRCKP/64 ns
QuadSpeedsamplingmode tLRCKP/64 ns
BCKperiod,tBCKP TDMdataformats
Normalsamplingmode tLRCKP/256 ns
DoubleSpeedsamplingmode tLRCKP/128 ns
QuadSpeedsamplingmode tLRCKP/64 ns
BCKhigh/lowtime,tBCKHL Alldataformats 0.45×tBCKP 0.55×tBCKP ns
Dataoutputdelay,tDO Alldataformats 10 ns
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LRCK
t
BCKHL
BCK
t
BCKHL
t
DO
DATA
Figure1.Audio SerialPortTiming:Left-JustifiedandI2SDataFormats
LRCK
t
BCKHL
BCK
t
BCKHL
t
DO
DATA
Figure2.Audio SerialPortTiming: TDM DataFormats
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PIN CONFIGURATION
PFBPACKAGE
TQFP-48
(TOPVIEW)
R
D
VCOMR REFGN VREFR DGND FMT0 FMT1 OWL0 OWL1 DGND MS/ OVFR OVFL
48 47 46 45 44 43 42 41 40 39 38 37
AGND 1 36 RST
VINR- 2 35 MCKI
VINR+ 3 34 LRCK
VCC1 4 33 BCK
AGND 5 32 DATA
AGND 6 31 VDD
PCM4220
AGND 7 30 DGND
AGND 8 29 NC
VCC2 9 28 NC
VINL- 10 27 NC
VINL+ 11 26 SUB0
AGND 12 25 SUB1
13 14 15 16 17 18 19 20 21 22 23 24
VCOML FGNDL VREFL PCMEN HPFDR HPFDL FS0 FS1 DF DGND DGND DGND
E
R
TERMINALFUNCTIONS
PIN
NAME NO. I/O DESCRIPTION
AGND 1 Ground Analogground
VINR– 2 Input Rightchannelinverting,2.8V nominalfull-scale
PP
VINR+ 3 Input Rightchannelnoninverting,2.8V nominalfull-scale
PP
VCC1 4 Power Analogsupply,+4.0Vnominal
AGND 5 Ground Analogground
AGND 6 Ground Analogground
AGND 7 Ground Analogground
AGND 8 Ground Analogground
VCC2 9 Power Analogsupply,+4.0Vnominal
VINL– 10 Input Leftchannelinverting,2.8V nominalfull-scale
PP
VINL+ 11 Input Leftchannelnoninverting,2.8V nominalfull-scale
PP
AGND 12 Ground Analogground
VCOML 13 Output Leftchannelcommon-modevoltage,(0.4875×VCC2)nominal
REFGNDL 14 Ground Leftchannelreferenceground,connecttoanalogground
VREFL 15 Output Leftchannelreferenceoutputfordecouplingpurposesonly
PCMEN 16 Input PCMoutputenable(activehigh)
HPFDR 17 Input Rightchannelhigh-passfilterdisable(activehigh)
HPFDL 18 Input Leftchannelhigh-passfilterdisable(activehigh)
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TERMINALFUNCTIONS(continued)
PIN
NAME NO. I/O DESCRIPTION
Samplingmodes:
FS0=0andFS1=0:Normalmode
FS0 19
Input FS0=1andFS1=0:DoubleSpeedmode
FS1 20
FS0=0andFS1=1:QuadSpeedmode
FS0=1andFS1=1:ReservedSamplingmode
Digitaldecimationfilterresponse:
DF 21 Input DF=0:Classicfilterresponse
DF=1:LowGroupDelayresponse
DGND 22 Ground Digitalground
DGND 23 Ground Digitalground
DGND 24 Ground Digitalground
TDMactivesub-frame:
SUB0=0andSUB1=0:Sub-frame0
SUB1 25
Input SUB0=1andSUB1=0:Sub-frame1
SUB0 26
SUB0=0andSUB1=1:Sub-frame2
SUB0=1andSUB1=1:Sub-frame3
NC 27 — Noexternalconnection,internallybondedtoESDpad
NC 28 — Noexternalconnection,internallybondedtoESDpad
NC 29 — Noexternalconnection,internallybondedtoESDpad
DGND 30 Ground Digitalground
VDD 31 Power Digitalsupply,+3.3Vnominal
DATA 32 Output Audioserialportdata
BCK 33 I/O Audioserialportbitclock
LRCK 34 I/O Audioserialportleft/rightwordclock
MCKI 35 Input Masterclock
RST 36 Input Resetandpower-down(activelow)
OVFL 37 Output Leftchanneloverflowflag(activehigh)
OVFR 38 Output Rightchanneloverflowflag(activehigh)
AudioserialportSlave/Mastermode:
S/M 39 Input S/M=0:Mastermode
S/M=1:Slavemode
DGND 40 Output Digitalground
Outputwordlength:
OWL0=0andOWL1=0:24-bits
OWL1 41
Input OWL0=1andOWL1=0:18-bits
OWL0 42
OWL0=0andOWL1=1:20-bits
OWL0=1andOWL1=1:16-bits
Audiodataformat:
FMT0=0andFMT1=0:Left-justified
FMT1 43 Input FMT0=1andFMT1=0:I2S
FMT0 44
FMT0=0andFMT1=1:TDM
FMT0=1andFMT1=1:TDMwithoneBCKdelay
DGND 45 Ground Digitalground
VREFR 46 Output Rightchannelreferenceoutputfordecouplingpurposesonly
REFGNDR 47 Ground Rightchannelreferenceground,connecttoanalogground
VCOMR 48 Output Rightchannelcommon-modevoltage(0.4875×VCC1nominal)
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TYPICAL CHARACTERISTICS
AtT =+25°C,VCC1=VCC2=+4.0V,andVDD=+3.3V,unlessotherwisenoted.
A
FFTPLOT FFTPLOT
0 0
f = 48kHz f = 48kHz
-20 S -20 S
f = 997kHz,-60dB Idle Channel (no input)
IN
-40 -40
B) -60 B) -60
d d
e ( -80 e ( -80
d d
u u
plit -100 plit -100
m m
A -120 A -120
-140 -140
-160 -160
-180 -180
20 100 1k 10k 20k 20 100 1k 10k 20k
Frequency (Hz) Frequency (Hz)
Figure3. Figure4.
THD+NvsINPUTFREQUENCY THD+NvsINPUTAMPLITUDE
-60 -60
f = 48kHz f = 48kHz
S S
-70 Input Amplitude =-1dB -70 fIN= 997Hz
BW = 22Hz to 20kHz BW = 22Hz to 20kHz
-80 -80
B) FS)
d -90 B -90
+N ( N (d
D -100 + -100
H D
T H
T
-110 -110
-120 -120
-130 -130
20 100 1k 10k 20k -140 -120 -100 -80 -60 -40 -20 0
Input Frequency (Hz) Input Amplitude (dB)
Figure5. Figure6.
CHANNELSEPARATIONvsINPUTFREQUENCY LINEARITY
0 0
-20 fS= 48kHz Left Channel fS= 48kHz
-20
-40 Right Channel
B)
n (d -60 S) -40
annel Separatio ---111-02480000 Linearity (dBF -1--068000
h
C -160
-120
-180
-200 -140
0 2 4 6 8 10 12 14 16 18 20 -140 -120 -100 -80 -60 -40 -20 0
Input Frequency (kHz) Input Amplitude (dB)
Figure7. Figure8.
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TYPICAL CHARACTERISTICS (continued)
AtT =+25°C,VCC1=VCC2=+4.0V,andVDD=+3.3V,unlessotherwisenoted.
A
FFTPLOT FFTPLOT
0 0
f = 96kHz f = 96kHz
-20 fS = 997Hz,-60dB -20 ISdle Channel (no input)
IN
-40 -40
B) -60 B) -60
d d
e ( -80 e ( -80
d d
u u
plit -100 plit -100
m m
A -120 A -120
-140 -140
-160 -160
-180 -180
20 100 1k 10k 50k 20 100 1k 10k 50k
Frequency (Hz) Frequency (Hz)
Figure9. Figure10.
THD+NvsINPUTFREQUENCY THD+NvsINPUTAMPLITUDE
-60 -60
fS= 96kHz fS= 96kHz
-70 Input Amplitude =-1dB -70 fIN= 997Hz
BW = 22Hz to 40kHz BW = 22Hz to 40kHz
-80 -80
B) FS)
d -90 B -90
+N ( N (d
D -100 + -100
H D
T H
T
-110 -110
-120 -120
-130 -130
20 100 1k 10k 40k -140 -120 -100 -80 -60 -40 -20 0
Input Frequency (Hz) Input Amplitude (dB)
Figure11. Figure12.
CHANNELSEPARATIONvsINPUTFREQUENCY LINEARITY
0 0
-20 fS= 96kHz Left Channel fS= 96kHz
-20
-40 Right Channel
B)
n (d -60 S) -40
paratio -1-0800 y (dBF -60
annel Se --112400 Linearit -1-0800
h
C -160
-120
-180
-200 -140
0 5 10 15 20 25 30 35 40 -140 -120 -100 -80 -60 -40 -20 0
Input Frequency (kHz) Input Amplitude (dB)
Figure13. Figure14.
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