DirectPath™ , Pop-Free3Vrms Line Driver with …

1 drv602 LEFTRIGHT-+-+ DECEMBER2008 REVISEDOCTOBER2010 DirectPath , Pop-Free3 VrmsLineDriverwithAdjustableGainCheckfor Samples: drv602 DesignedusingTI'spatentedDirectPath 1 FEATURES technology,theDRV602iscapableofdriving3 Vrms234 DirectPath intoa EliminatesPop/Clickshasdifferentialinput sandusesexternalgainsettingresistors,tha tsupportsagainrangeof 1V/Vto EliminatesOutputDC-BlockingCapacitors 10 ProvidesFlatFrequencyResponsetheimplemen tationofa 2ndorderlowpassfilterto20Hz 20kHzcomplimentDAC' LowNoiseandTHDoutputoftheDRV602has (referredtoasthe'602)hasbuilt-in SNR> 102dBshutdowncontrolforpop-freeon/offcon trol.

2 TypicalVN< 15mVmsUsingtheDRV602inaudioproductscanre duce THD+N< 20kHzcomponentcountcomparedtotraditional methodsof 't 2 ,nordoesit requirea splitrailpower 3 LoadWithtogenerateanegativesupplyrailtha tprovidesa5 VSupplyVoltageclean,pop-freegroundbiased 3 Vrmsoutput. ,trimmedDC-offsetandexternal Set-TopBoxesundervoltage-mutefunctionsar ebeneficialinthe PDP/ LCDTV application,TIrecommendsthefootprintcomp atible Blu-rayDisc , DVD-PlayersDRV603(SLOS617). HomeTheaterina BoxFora stereolineandstereoHPdriverseeDRV604(SLO S659). ,standardwarranty,andusein , a 2008 2010, +INR234-INROUTRSGND5678 ENPVSSCN91011121314 CPPVDDPGNDOUTL-INL+INLC harge PumpNCaDRV602 SLOS572D DECEMBER2008 (TSSOP)PACKAGE(TOPVIEW)PINFUNCTIONSPINI/ O(1)DESCRIPTIONNAMETSSOP(PW)

3 +INR1 IRightchannelOPAMP positiveinput INR2 IRightchannelOPAMP negativeinputOUTR3 ORightchannelOPAMP outputSGND4 ISignalgroundEN5 IEnableinput,activehighPVSS6 OSupplyvoltageCN7I/OChargepumpflyingcapa citornegativeterminalCP8I/OChargepumpfly ingcapacitorpositiveterminalPVDD9 IPositivesupplyPGND10 IPowergroundNC11 NointernalconnectionOUTL12 OLeftchannelOPAMP output INL13 ILeftchannelOPAMP negativeinput+INL14 ILeftchannelOPAMP positiveinput(1)I = input,O = output,P = power2 Copyright 2008 2010,TexasInstrumentsIncorporatedProduct FolderLink(s) DECEMBER2008 REVISEDOCTOBER2010 ABSOLUTEMAXIMUMRATINGS(1)(2)overoperatin gfree-airtemperaturerangeVALUEUNITS upplyvoltage,VDDtoGND + > 600 ENtoGND + , 40to150 CTstgStoragetemperaturerange 40to150 CESDIECC ontactESDP rotectionperIEC6100-4-2,onoutputpinsmeas uredonDRV602 EVM 8kV(1) ,andfunctionaloperationofthedeviceatthes eoranyotherconditionsbeyondthoseindicate dunderrecommendedoperatingconditionsis (2)ThesevoltagesrepresentstheDCvoltage+ peakACwaveformmeasuredattheterminalofthe devicein (1)POWERRATING(1)PACKAGEqJC( /W)qJA( /W)ATTA 25 CATTA 70 CTSSOP-14(PW)35115(2)

4 870mW348mW(1)Powerratingis determinedwitha junctiontemperatureof125 Cforbestperformanceandreliability.(2)The sedataweretakenwiththeJEDECHigh-Ktestpri ntedcircuitboard(PCB).FortheJEDEClow-Kte stPCB,theqJAis 185 (1)DESCRIPTION-40 C to85 CDRV602PW14-PinTSSOP(1)Forthemostcurrent packageandorderinginformation,seethePack ageOptionAddendumattheendofthisdocument, , 4085 CELECTRICALCHARACTERISTICSTA= 25 C (unlessotherwisenoted)PARAMETERTESTCONDI TIONSMINTYPMAXUNIT|VOS|Outputoffsetvolta geVDD= 3 V to5 V,Voltagefollower- gain= 15mVPSRRS upplyRejectionRatioVDD= to5 V88dBVOHHigh-leveloutputvoltageVDD= ,RL= ,RL= |IIH|High-levelinputcurrent(EN)VDD= 5 V,VI= VDD1 A|IIL|Low-levelinputcurrent(EN)

5 VDD= 5 V,VI= 0 V1 AVDD= ,Noload,EN= VDD811mAIDDS upplyCurrentVDD= 5 V,Noload,EN= ,Vdd= 3 V to5 V2mACopyright 2008 2010,TexasInstrumentsIncorporated3 ProductFolderLink(s):DRV602R3C2 RIGHTINPUT+ +-C1R3R1R1R2C2R2C31 FmDRV6021 Fm1 FmClick and PopSuppressionShort CircuitProtectionSGNDBiasCircuitryPVSSCN CPPVDD-INL+INLOUTR-INROUTL+INRENPGNDNCLi neDriverLineDriverC2 ENABLEC3C3C3 drv602 SLOS572D DECEMBER2008 , TA= 25 C,RL= , C(PUMP)= C(PVSS)= 1 F , CIN= 1 F,RIN= 33k , Rfb= 68k (unlessotherwisenoted)PARAMETERTESTCONDI TIONSMINTYPMAXUNITTHD= 1%,VDD= ,f = 1 (OutputsInPhase)

6 VrmsTHD= 1%,VDD= 5 V,f = 1 2 Vrms,f = 1 +NTotalharmonicdistortionplusnoiseVO= 2 Vrms,f = 2 Vrms,f = 1 kHz 100dBIOO utputcurrentlimitVDD= ,BW20Hz 22kHz15mVrmsVO= 2 Vrms,THD+N= ,22kHzBW,SNRS ignaltonoiseratio102dBA-weightedGBWU nityGainBandwidth8 MHzAVOOpen-loopvoltagegain150dBFcpCharge Pumpfrequency225450675kHzAPPLICATIONCIRC UITR1= 33k , R2= 68k , R3= 100k , C1= 150pF,C2= 15pF,C3= 1mFDifferentialinput,singleendedoutput, 3dBfrequency, 2008 2010,TexasInstrumentsIncorporatedProduct FolderLink(s) 800m234V - Output Voltage - VrmsOTHD+N - Total Harmonic Distortion+Noise - %20 Hz1 kHz2020k50 100 +N - Total Harmonic Distortion+Noise - %f - Frequency - Hz200 mVrms2 Vrms14m12m10m8m6m4m2m0-0+1+2+3+4+5 Quiescent Current - AV- Supply Voltage - VDDNo Load,V = 0 VI+0-20-40-60-80-100-120-14005k10k20k15k V = 2 VrmsOFFT - dBrf - Frequency - DECEMBER2008 REVISEDOCTOBER2010 TYPICALCHARACTERISTICSVDD= , TA= 25 C,C(PUMP)= C(PVSS)= 1 F , CIN= 1 F,RIN= 33k , Rfb= 68k , RL= (unlessotherwisenoted)

7 TOTALHARMONICDISTORTION+ NOISETOTALHARMONICDISTORTION+ 2008 2010,TexasInstrumentsIncorporated5 ProductFolderLink(s): drv602 OPAMPCoMute CircuitOutputEnable+++-Conventional SolutionDRV602 OutputEnable+-DVR602 SolutionVDDVSSGNDVDDVDD/2 GNDD irectPath9-12 V5 VDRV602 SLOS572D DECEMBER2008 Figure5 value,anda mutecircuitis neededduringpoweruptominimizeclick& , amplifierarchitectureoperatesfroma singlesupply,butmakesuseofaninternalchar gepumptoprovidea ,thedeviceoperatesinwhatis effectivelya 2008 2010,TexasInstrumentsIncorporatedProduct FolderLink(s): drv602 -InRfb+-InvertingRIN CINRfbRfb+-DifferentialInput-In+InCINRIN RINCINRINCIN+InRfbRx+ DECEMBER2008 REVISEDOCTOBER2010 ChargePumpFlyingCapacitorandPVSSC apacitorThechargepumpflyingcapacitor,CPU MP, ,anda valueof1 F is F canbeused, a DirectPathLineDriveramplifierthatrequire adequatepowersupplydecouplingtoensuretha tthenoiseandtotalharmonicdistortion(THD) goodlowequivalent-series-resistance(ESR)

8 Ceramiccapacitor,typically1 F, ,a 10- F orgreatercapacitorplacedneartheaudiopowe ramplifierwouldalsohelp,butit is notrequiredin ,RINandRfb, mustbechosensothatnoise,stabilityandinpu tcapacitorsizeoftheDRV602is largeinputac-couplingcapacitor,CIN. ,RINVALUE,RfbGAINGAIN22k 22k 30k 68k 100k 2008 2010,TexasInstrumentsIncorporated7 ProductFolderLink(s):DRV602fcIN+12pRINCI NCIN+12pfcINRINor- InDifferential InputInverting InputDRV602R1R2+-C3R3C1C2+ In- InR1R2+-C3R3C1C2C3R1R3C1R2 drv602 drv602 SLOS572D DECEMBER2008 , high-passfilterwiththeinputresistor,RIN.

9 ThecutofffrequencyiscalculatedusingEquat ion1. Forthiscalculation,thecapacitanceusedist heinput-blockingcapacitorandtheresistanc eistheinputresistorchosenfromTable1, thenthefrequencyand/orcapacitancecanbede terminedwhenoneofthetwovaluesaregiven.(1 ) possiblewiththeDRV602asit canbeusedlikea , a MultiFeedBack-MFB,withdifferentialinputa ndsingleendedinputis shown,it servestoblockanydccontentfromthesourcean dlowersthedc-gainto1 programavailableontheTIwebsiteat: lowvalueforobtaininglownoise,butshouldal sohavea highenoughvaluetogeta ,33k,68k,100k,a DNRof102dBcanbeachievedwitha small1mF 2008 2010,TexasInstrumentsIncorporatedProduct FolderLink(s): drv602 Supply rampSupplyENTime for ac-couplingcapacitors to DECEMBER2008 REVISEDOCTOBER2010 Pop-FreePowerUpPop-freepowerupis ensuredbykeepingtheEN(enablepin).

10 Thisway,properprechargeoftheac-couplingi s performed,andpop-freepower-upis highcapacitiveloadupto220pFdirectly,high ercapacitiveloadscanbeacceptedbyaddinga seriesresistorof10 proposedlayoutfortheDRV602canbeseenin theDRV602 EVMuser'sguide(SLOU248) , opentheDRV602productfolderandlookin ,RINandRfb, ,seetheDRV602 EVMuser' 2008 2010,TexasInstrumentsIncorporated9 ProductFolderLink(s): drv602 drv602 SLOS572D DECEMBER2008 (December2008)toRevisionBPage (October2009)toRevisionCPage Added"Pop-Free" totitleandchanged"pop-less" to"pop-freein AddedOutputVoltageFeaturebullet:"3 VrmsWith5-VSupplyVoltage".