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4.12HPOutputsTab
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TLV320AIC3107EVMSoftware
Figure28.HighPowerOutputsTab
Thistabcontainsfourhorizontalgroupingsofcontrols,oneforeachofthehighpoweroutputs.Each
outputhasamixertomixtheLINE2L,LINE2R,PGA_L,PGA_R,DAC_LandDAC_Rsignals,assuming
thattheDACsarenotrouteddirectlytothehighpoweroutputs(seeSection4.10).
AttheleftofeachoutputstripisaPoweredUpbuttonthatcontrolswhetherthecorrespondingoutputis
poweredupornot.TheWhenpowereddownbuttonallows3-stateoutputsordrivenweaklytoathe
outputcommon-modevoltage.
TheHPxCOMoutputs(HPLCOMandHPRCOM)canbeusedasindependentoutputchannelsorcanbe
usedascomplementarysignalstotheHPLOUTandHPROUToutputs.Inthesecomplementary
configurations,theHPxCOMoutputscanbeselectedasDifferentialofHPxOUTsignalstothe
correspondingoutputsorcanbesettobeacommon-modevoltage(ConstantVCMOut.Whenusedin
theseconfigurations,thePoweredUpbuttonfortheHPxCOMoutputisdisabled,asthepowermodefor
thatoutputtracksthepowerstatusoftheHPLorHPRoutputthattheCOMoutputistracking.
TheHPRCOMConfigselectorallowsacoupleadditionaloptionscomparedtotheHPLCOMConfig
selector.DifferentialofHPLCOMallowstheHPRCOMtobethecomplementarysignalofHPLCOMfor
drivingadifferentialloadbetweentheHPxCOMoutputs.TheselectoralsoallowsExt.
Feedback/HPLCOMconstantVCMasanoption.Thisoptionisusedwhenthehighpoweroutputsare
configuredforCaplessoutputdrive,whereHPLCOMisconfiguredasConstantVCMOut.Thefeedback
optionprovidesfeedbacktotheoutputandlowerstheoutputimpedanceofHPLCOM.
Attherightsideoftheoutputstripisamastervolumeknobforthatoutput,whichallowstheoutput
amplifiergaintobemutedorsetfrom0to9dBin1-dBsteps.
SLAU261–November2008TLV320AIC3107EVM-K29
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