User's Guide SLAU313–May2010 ADS58C48EVM This is the user’s guide for the ADS58C48 EVM. The ADS58C48 is a quad 11-bit, 200 MSPS analog-to-digital converter with optional SNR boost capabilities for improving SNR within a specified bandwidth. The schematic, BOM, and layout files can be found in the design package in the ADS58C48 EVM product folderonwww.ti.com. Contents 1 SoftwareControl ............................................................................................................ 1 1.1 InstallationInstructions ............................................................................................ 2 1.2 SoftwareOperation ................................................................................................ 3 2 BasicTestProcedure....................................................................................................... 6 2.1 TestBlockDiagram ................................................................................................ 6 2.2 VerifyBoardSet-up ................................................................................................ 6 2.3 TestSet-UpConnections ......................................................................................... 6 2.4 TSW1200QuickStartOperation................................................................................. 7 2.5 ADS58C48TestProcedure ....................................................................................... 7 2.6 ADS58C48PerformanceResults ................................................................................ 8 3 OptionalConfiguration:PGA870 .......................................................................................... 9 ListofFigures 1 FoundNewHardware...................................................................................................... 2 2 WindowLogoTesting...................................................................................................... 2 3 ADS58C48GUIFrontPanel–TopLevel................................................................................ 4 4 ADS58C48GUI–AdvancedLevel....................................................................................... 5 5 TestSet-upBlockDiagram................................................................................................ 6 6 TSW1200GUI............................................................................................................... 7 7 FFTPlot:200MHzClock,149MHzinput;SNRBOOSTDisable..................................................... 8 8 FFTPlot:200MHzclock,149MHzinput;SNRBOOSTEnabledWithFilter#40.................................. 9 ListofTables 1 DefaultEVMJumperSetting.............................................................................................. 6 2 JumperSettingforTransformer-CoupledorOPA-DrivenInput ...................................................... 9 1 Software Control TheADS58C48hasmanyfunctionscontrolledbyinternalregisters.Theinternalregisterscanbe accessedthroughthedevice'sserialportinterfaceandwrittenwithindividualcodeorsequencebythePC program,ADS58C48_GUI_vxpx,throughon-boardUSB. SLAU313–May2010 ADS58C48EVM 1 Copyright©2010,TexasInstrumentsIncorporated

SoftwareControl www.ti.com 1.1 Installation Instructions ThecontrolsoftwareADS58C48_GUI_vxpxcanbeinstalledonapersonalcomputerbyrunningthe setup.exefilelocatedontheCD.Thisfileinstallsthegraphicaluserinterface(GUI)alongwiththeUSB driverstocommunicatetotheUSBportontheEVM.Afterthesoftwareisinstalled,inserttheUSBcable intotheEVM.ThePCwillautomaticallydetectthenewhardwareandinitializetheFoundNewHardware WizardandtestWindowsLogotofinishtheUSBdriverinstallation,showninFigure1andFigure2.The installationstepsaresummarizedasfollowing: 1. OpenfoldernamedADS58C48_Installer_vxpx(xpxrepresentsthelatestversion) 2. RunSetup.exeunderthefolderVolumeandfollowtheon-screeninstructions AtfirstWindowdisplays“ADS58C48Installer”shownbox,thenclick“next”→onnewpage,select“I accept”→onnewpage,click “next”→onnewpage,click“next”→onnewpage,PCdisplay “The installerhasfinishedupdatingyoursystem”,thenclick “next”→onnewpage,PCdisplay “…hasnot passwindowsLogotest”,thenclick “continueanyway”→onnewpage,click “continueanyway”. 3. Onceinstalled,launchbyclickingontheADS58C48_GUI_vxpxprograminStart>TexasInstruments ADCs 4. WhenpluggingintheUSBcableforthefirsttime,youwillbepromptedtoinstalltheUSBdrivers. (a)Whenapop-upscreenopens,select"ContinueDownloading". (b)FollowtheonscreeninstructionstoinstalltheUSBdrivers (c) Ifneeded,youcanaccessthedriversdirectlyintheinstalldirectory Figure1.FoundNewHardware Figure2.WindowLogoTesting 2 ADS58C48EVM SLAU313–May2010 Copyright©2010,TexasInstrumentsIncorporated

www.ti.com SoftwareControl 1.2 Software Operation ThesoftwareallowsfullprogrammingcontroloftheADCdevice.Afterlaunchingthe ADS58C48_GUI_vxpxprogram,twolevelsofregistertabareshownontheGUI(seeFigure3).TheTop Leveltabprovidesaninterfacetothemostusedregisters.TheAdvancedtabincludesrarelyused registersandanoptiontomanuallyinputaddressanddatavalues.Click"ResetUSBPort"tosetup communicationwithUSBporteachtimeafterinsertingtheUSBorpoweringuptheEVM. 1.2.1 TopLevel Figure3showsthetopleveloftheregisteruserinterface.Onthispanel,somecommonregisterscanbe accessedbyclickingtheswitcheswithouttypingintheregisteraddressandcode.Thefollowingisalistof functionscontrolledbytheswitchesorselectionboxesontheTopLevelpanel: • Reset:Devicereset,clickthisswitchonoroff • PNDGlobal:Devicepowerdown,clickthisswitchonoroff • Dataformat:Dataoutputformat,canbesetinto2’sorSOBbyclickingthisswitchonoroff • LVDS_CMOSCtrl:LVDSorCMOSoutputformat,canbeselectedbysetthisbox • Gain_chA:GainofChannelA,canbesetbythisbox • Gain_chB:GainofChannelB,canbesetbythisbox • Gain_chC:GainofChannelC,canbesetbythisbox • Gain_chD:GainofChannelD,canbesetbythisbox • TestPattern:Devicetestmodeenable,canbesetbythisbox • SNRBoostChA:ChannelASNRBoostenableswitch • SNRBoostChB:ChannelBSNRBoostenableswitch • SNRBoostChC:ChannelCSNRBoostenableswitch • SNRBoostChD:ChannelDSNRBoostenableswitch • SNRboostfilterChx:SNRBoostfiltertypeofchannelA,B,CorDcanbeselectedinthisgroupof selectionboxeswhichislocatedattherightsideoftheSNRBoostenableswitches SLAU313–May2010 ADS58C48EVM 3 Copyright©2010,TexasInstrumentsIncorporated

SoftwareControl www.ti.com Figure3.ADS58C48GUIFrontPanel– TopLevel 1.2.2 AdvancedLevel Clickonthe"Advanced"tabontheGUItobringtheadvancedpaneltothefront.Onthispanel,ausercan writeaddressandcodeoftheregisterintotheaddress/codeboxes(shownasFigure4)thenpressEnter onthekeyboardor"SendAll"buttononthepaneltosendaddressandcodetoADC.Theaddressand codewillbeshownonthedisplayboxlocatedattherightsideofthepanelwhenitissenttoADC. Additionalsettingsonadvancedpanelcanbeusedtosetoutputoffsetfunctionsandpinoverwrite,aswell asvirtualLEDstoindicatethecustomtestpattern. 4 ADS58C48EVM SLAU313–May2010 Copyright©2010,TexasInstrumentsIncorporated

www.ti.com SoftwareControl Figure4.ADS58C48GUI– AdvancedLevel 1.2.3 RegisterControl ● SendAll: Sendsalltheregisterconfigurationsonthepaneltothedevice ● ReadAll: Readsregisterconfigurationfromdevice ● SaveRegs: Savestheregisterconfigurationtotextfile ● LoadRegs: Loadsaregisterfilefromatextfile.Afterloadregistertherelativeswitchesand selectingboxesareautomaticallyupdated. — SelectLoadRegsbutton. — Doubleclickonthedatafolder. — Doubleclickonthedesiredregisterfile. — ClickonSendAlltoensureallthevaluesareloadedproperly. 1.2.4 MiscSettings ● ResetUSB: TogglethisbuttoniftheUSBportisnotresponding.ThisgeneratesanewUSB handleaddress ● Exit: Stopstheprogram SLAU313–May2010 ADS58C48EVM 5 Copyright©2010,TexasInstrumentsIncorporated

BasicTestProcedure www.ti.com 2 Basic Test Procedure ThissectionoutlinesthebasicprocedurefortestingtheEVM. 2.1 Test Block Diagram Thetestset-upforgeneraltestingoftheADS58C48withtheTSW1200capturecardisshowninFigure5. PC USB USB J8 J10 Signal Generator CLK J7 HP8644B or Equivalent ADS58C48 TSW1200 Signal Generator CHAJ4 HP8644B or Equivalent CHB J6 CHC J8 J7 J1 J3 CHD J9 +6V +6V GND Figure5.TestSet-upBlockDiagram 2.2 Verify Board Set-up VerifyjumpersettingsareinthecorrectpositionasoutlinedinTable1. Table1.DefaultEVMJumperSetting Jumper DefaultPosition Function JP4 Short1-2 DCsupplyforAVdd JP5 Short1-2 DCsupplyforDRVdd JP6 Short1-2 USBsupply5VfromPC JP7 Short1-2 DCsupply6V JP8 Short1-2 DCsupply3.3V JP11 Short1-2 SNRboostoffforchA,B JP12 Short5-6 PDNnormal JP13 Short1-2 SNRboostoffforchC,D JP16 Short1-2 OPAdisable JP17 Short OPAgain JP18 Short1-2 OPAlatchmode JP19 Short1-2 OPAgainstrobe 2.3 Test Set-Up Connections • ConnectADS58C48EVMtoTSW1200EVM • Connect6VpowertobananajackatJ1;connectgroundtoJ3 • ConnectUSBcabletoprogrammingcomputeratJ10 • ConnectUSBandpowersupplyjacktoTSW1200 • ConnectClocksignalthroughappropriateBPFtoJ7 • ConnectinputsignalthroughappropriateBPFtoJ4,J6,J8orJ9 6 ADS58C48EVM SLAU313–May2010 Copyright©2010,TexasInstrumentsIncorporated

www.ti.com BasicTestProcedure 2.4 TSW1200 Quick Start Operation FormoredetailedexplanationspleaserefertothetheTSW1200User’sGuideforset-upandoperation. ThisdocumentassumestheTSW1200softwareisinstalledandfunctioningproperly.Thefrontpanelof theTSW1200isshowninFigure6.Thefollowingconfigurationneedstobechangedfromthedefault settings. • JumpersettingonTSW1200board SetJ11(2-3)orHigh,J10(1-2)orLowforLVDSDDRdatainput(default) SetJ11(2-1)orLow,J10(1-2)orLowfor1-wireserialdatainput • SelectADS58C48devicenamefromtheTIADCSelectionpull-downmenu – Ifthisoptionisnotavailablethendownloadthelatestinifilefromtheproductfolderofthe TSW1200atwww.ti.com – PlaceupdatedinifilesintheTSW1200productdirectorylocatedatC:\ProgramFiles\Texas Instruments\TSW1200\ADCFiles • SelectSingleToneFFTfromtheTestpull-downmenu • Selectthedesiredchannel(i.e.ChannelA,B,C,orD)fromtheChannelDisplaypull-downmenu • ChangeADCsamplingratetodesiredvalue(i.e.,200MHz) • Changeinputfrequencytodesiredvalue(i.e.,149MHzorother) • PressCtrl-Shift-Itoresetthesoftwareasneeded • Verifystatusdisplayinlowerlefthasnoerrors • PressCapturebuttontoinitiateadatacapture Figure6.TSW1200GUI 2.5 ADS58C48 Test Procedure • Switchon6Vpowersupply.Verifysourcecurrentisabout470mA+/-20mAwithclockandTSW1200 connectedatSNRBoostonfor4channels. • ConnectclocksignalatJ7throughanappropriateBPF. – Adjustthesignalgeneratoramplitudeoutputtoprovideapproximately1VppatJ7. – Useahighquality,lowphasenoisegeneratorforthisinputtoensureproperdeviceevaluation. • ConnectinputsignalthroughanappropriateBPFateither:J4,J6,J8orJ9(ChannelA,B,CorD). – AdjustfrequencyofgeneratortomatchthecoherentfrequencydisplayedintheTSW1200GUI. – SelecttheproperDisplayChannelontheTSW1200GUIsoftwarethatcorrespondstotheinput connection. – Adjustthesignalgeneratoramplitudeoutputtoachieve –1dBFS. SLAU313–May2010 ADS58C48EVM 7 Copyright©2010,TexasInstrumentsIncorporated

BasicTestProcedure www.ti.com – Useahighquality,lowphasenoisegeneratorforthisinputtoensureproperdeviceevaluation. • EnableSNRBoost(ifdesired) – HardwareenablebySNRBoostpins,JP11andJP13 • SetDigitalFunctCtrlto"GainEnabled" • SelectdesiredSNRBoostFilterChxregister • SetDigitalFunctCtrlto"GainDisabled" • UseHardwarepinsatjumperJP11andJP13toturnon/offSNRBoostforeachpairofchannels – SoftwareenablebysettingtheGUIregistersonly • SetDigitalFunctCtrlto"GainEnabled" • SetdesiredSNRBoostChxtoOn • SelectdesiredSNRBoostFilterChxregister • SetDigitalFunctCtrlto"GainDisabled" • SetOverrideSNRbPinsonAdvancedTabtoOn • InitiateacapturebypressingtheCapturebuttonontheTSW1200GUI. 2.6 ADS58C48 Performance Results Figure7showstheperformanceresultswiththeSNRBoostdisabledat200MSPSclockfrequencyand witha149MHzinputtone.Figure8showsthesameset-upwithSNRBoostenabledusingafilterregister settingof40(BW=60×Fs/184MHz;CF=46 ×Fs/184MHz)correspondingroughlyto60MHzofBWfor thegivenclockingrate.ADCcalculationsrelatedtoSNRandSFDRarecompletedoverthisspecified bandwidth. Figure7.FFTPlot:200MHzClock,149MHzinput;SNRBOOSTDisable 8 ADS58C48EVM SLAU313–May2010 Copyright©2010,TexasInstrumentsIncorporated

www.ti.com OptionalConfiguration:PGA870 Figure8.FFTPlot:200MHzclock,149MHzinput;SNRBOOSTEnabledWithFilter#40 3 Optional Configuration: PGA870 ChannelDinput(J9)canbeconfiguredtoutilizetheprogrammablegainop-amp,PGA870.Thechanges requiredtomodifythetransformercoupledinputtotheOPA-driveninputareshownin. Table2.JumperSettingforTransformer-CoupledorOPA-DrivenInput Jumpers Transformer-CoupledInput OPA-DrivenInput SJP1 Shunt1-2,default Shunt3-2 SJP2 Shunt1-2,default Shunt3-2 SJP3 Shunt3-2,option SJP4 Shunt1-2,default Shunt3-2 JP16 Shunt1-2 JP17 Shunt1-2,default JP18 Shunt1-2,default JP19 Shunt1-2,default Powerissuppliedtothedevicebyapplying5VtoJ2andGNDJ3.BydefaultthePGA870issetasfixed gain.ThereisgaincontrolavailablethroughSW2,JP18andJP19.Anon-boardlayoutoptionforaLPFor BPFisavailablebetweentheamplifierandtheADC.Bydefaultthefilterisbypassedtoallowtheuser flexibilitytodesignaccordingtodesiredspecifications. SLAU313–May2010 ADS58C48EVM 9 Copyright©2010,TexasInstrumentsIncorporated

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