1FEATURES
APPLICATIONS
DESCRIPTION
PCM2704, ,PCM2705
PCM2706,PCM2707
www.ti.com
.......................................................................................................................................................SLES081F–JUNE2003–REVISEDJANUARY2009
STEREOAUDIODACWITHUSBINTERFACE,
SINGLE-ENDEDHEADPHONEOUTPUTANDS/PDIFOUTPUT
–ExternalROMInterface(PCM2704/6)
2345•On-ChipUSBInterface:–SerialProgrammingInterface(PCM2705/7)
–NoNeedofDedicatedDeviceDriver–I2SInterface(SelectableonPCM2706/7)
–WithFull-SpeedTransceivers•Package:
–FullyCompliantWithUSB1.1Specification–28-PinSSOP(PCM2704/5)
–CertifiedbyUSB-IF–32-PinTQFP(PCM2706/7)
–PartiallyProgrammableDescriptors
–AdaptiveIsochronousTransferfor•USBHeadphones
Playback•USBAudioSpeaker
–Bus-PoweredorSelf-PoweredOperation•USBCRT/LCDMonitor
•SamplingRate:32,44.1,48kHz•USBAudioInterfaceBox
•On-ChipClockGeneratorWithSingle12-MHz•USB-FeaturedConsumerAudioProduct
ClockSource
•SinglePowerSupply:
–Bus-Powered:5V,Typical(VBUS)ThePCM2704/5/6/7isTI'ssingle-chipUSBstereo
–Self-Powered:3.3V,TypicalaudioDACwithUSB-compliantfull-speedprotocol
•16-BitDelta-SigmaStereoDACcontrollerandS/PDIF.TheUSB-protocolcontroller
workswithnosoftwarecode,butUSBdescriptors
–AnalogPerformanceat5V(Bus-Powered),canbemodifiedinsomeparts(forexample,vendor
3.3V(Self-Powered):ID/productID)throughtheuseofanexternalROM
–THD+N:0.006%RL>10kΩ,(PCM2704/6),SPI(PCM2705/7),oronrequest.(1)
Self-PoweredThePCM2704/5/6/7employsSpAct™architecture,
TI'suniquesystemthatrecoverstheaudioclockfrom
–THD+N:0.025%RL=32ΩUSBpacketdata.On-chipanalogPLLswithSpAct
–SNR=98dBenableplaybackwithlowclockjitter.
–DynamicRange:98dB
–PO=12mW,RL=32Ω
–OversamplingDigitalFilter
–Pass-BandRipple=±0.04dB
–Stop-BandAttenuation=–50dB
–Single-EndedVoltageOutput
–AnalogLPFIncluded
•MultipleFunctions:
–UptoEightHumanInterfaceDevice(HID)
Interfaces(DependingonModeland(1)ThemodificationoftheUSBdescriptorthroughexternalROM
Settings)orSPImustcomplywithUSB-IFguidelines,andthevendor
IDmustbeyourownIDasassignedbytheUSB-IF.The
–SuspendFlagdescriptoralsocanbemodifiedbychangingamask;contact
–S/PDIFOutWithSCMSyourrepresentativefordetails.
1
Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas
Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
2SpActisatrademarkofTexasInstruments.
3SystemTwo,AudioPrecisionaretrademarksofAudioPrecision,Inc.
4I2SisatrademarkofNXPSemiconductors.
5Allothertrademarksarethepropertyoftheirrespectiveowners.
PRODUCTIONDATAinformationiscurrentasofpublicationdate.Copyright©2003–2009,TexasInstrumentsIncorporated
ProductsconformtospecificationsperthetermsoftheTexas
Instrumentsstandardwarranty.Productionprocessingdoesnot
necessarilyincludetestingofallparameters.
