MxL201RF-Reference-Design-Rev5.2-20100827

MxL201RFDigitalCableTunerReferenceDesignVersion5.2August27,2010InformationcontainedinthisdocumentisCompanyPrivatetoMaxLinearInc.andshallnotbeused,copied,reproduced,ordisclosedinwholeorinpartwithoutthewrittenconsentofMaxLinear.MxL201RFReferenceDesignREV5.2Page2of22MaxLinearConfidential8/27/2010TableofContents1.IntroductionandBlockLevelDiagram..................................................................32.RecommendedPowerSupplyOptions....................................................................43.Referenceschematics................................................................................................74.BillofMaterials(BOM)..........................................................................................105.PCBlayoutguidelines.............................................................................................126.PhysicalLayoutExample.......................................................................................177.GerberReferenceInformation..............................................................................208.RevisionHistory......................................................................................................22MxL201RFReferenceDesignREV5.2Page3of22MaxLinearConfidential08/27/20101.IntroductionandBlockLevelDiagramThisdocumentintroducesthereferencedesignoftheMxL201RFsilicontuner.TheMxL201RFisabletoconvert44-1002MHzRFinputsignaltoIFfrequenciesrangingfrom4to44MHz.Thetunerallowsprogrammablechannelbandwidthsof6,7,or8MHz.TheICalsosupportsvariouscrystalfrequenciesrangingfrom16MHzto50MHz.Bydefault48MHzcrystalisusedtoprovidetheoptimalphasenoiseperformance.TheMxL201RFcanbeusedforstandarddigitalcableapplications(ITU-TJ.83AnnexesA[DVB-C]andCandB[USCable],DOCSIS,andEURODOCSIS)aswellasstandarddigitalterrestrialapplications(DVB-T/H,ATSC,andDMB-T/H).MxL201RFSiliconTunerDigitalCable/DigitalTerrestrialDemodulatorVagcMPEGTSOutputInputIFFigure1–MxL201RFinsingle-tunerdigitalcable/terrestrialapplicationsFigure1showsMxL201RFoperatinginstandardsingle-tunerdigitalcable/terrestrialapplications.Thetunercanbeconfiguredtoeitherlow-IForhigh-IFoutput(low-IFispreferredfortheoptimalperformance)withsingleAGCcontrol.MxL201RFReferenceDesignREV5.2Page4of22MaxLinearConfidential08/27/20102.RecommendedPowerSupplyOptionsTheMxL201RFtunercanoperatewitheitherasinglevoltagesupply(3.0-3.6V)instandardmodeasshowninFigure2,ordualvoltagesupplies(3.0-3.6Vand1.7-2.0V)inlow-powermode,asshowninFigure3.TheMxL201RFusestwoon-chiplinearregulatorstoprovide1.6Vsupplyandoneon-chiplinearregulatortoprovidethe1.2Vsupply.Figure2–Powersupplyconfigurationdiagramofstandard-powermodeMxL201RFReferenceDesignREV5.2Page5of22MaxLinearConfidential08/27/2010Figure3–Powersupplyconfigurationdiagramoflow-powermodeMxL201RFReferenceDesignREV5.2Page6of22MaxLinearConfidential08/27/2010Table1belowshowsthepowerconsumptionestimateforthetwodifferentsupplyconfigurations.ThepowerconsumptionofMxL201RFcanbeminimizedbyproviding1.7-2.0V(1.8Vnominal)toVBATT_A1,A2and3.0-3.6V(3.3Vnominal)toVBATT_A3,A4,andA5.PleasenotethepowerconsumptionestimateshowninTable1isbasedonthefollowingassumptions:1)MxL201RFtunerisoperatingindigitalcablemodeatUHFfrequency2)VBATT_A1,A2=3.3Vforstandard-powerconfiguration.VBATT_A1,A2=1.8Vforlow-powerconfiguration.VBATT_A3,A4,A5=3.3Vforbothstandard-powerandlow-powerconfiguration.Table1–PowerconsumptionestimateofMxL201RFVBATT_A1+A2(Estimate)VBATT_A3+A4+A5(Estimate)TotalPowerConsumption(Estimate)Standard-PowerConfiguration3.0V–3.6V150mA3.0V–3.6V43mA3.3V*193mA(637mW)Low-PowerConfiguration1.7V–2.0V150mA3.0V–3.6V43mA1.8V*150mA+3.3V*43mA(412mW)MxL201RFReferenceDesignREV5.2Page7of22MaxLinearConfidential08/27/20103.ReferenceschematicsFigure4showsthereferenceschematicofMxL201RF.Figure4–ReferenceschematicofMxL201RF0402C7470n0402L173.6n0402C424.7n0402L18120nVdd_A1.6V_DVBATT_A40402C8DNPY248MHzRFInputPortVdd_A1.6VVBATT_A3FConnJ3120402L5033n0402C721nVdd_RF_VCO_LO_3VF1U4MxL201RFLNA_IN2AS6LT_OUT3VDD_DNX21VBATT_A34IDAC5VBATT_A57XTAL_N8XTAL_P9CLK_OUT10GND_XTAL11VREG_A_OUT112VDD_DNX131TF_230TF_329VREG_A_OUT228VBATT_A227VAGC26GND_IF23VBATT_A113SCL14SDA15IF_OUTP25VDD_IO16GND_DIG17VREG_D_OUT18VREG_D_IN19VBATT_A420VDD_REF_SX21GND_REF_SX22IF_OUTN24PADDLE33TF_132Vdd_A1.6V_D0402R7247SDAComponentsrequiredforoptionalon-chiploop-through.Ifloop-throughisnotused,theLT_OUTpinmustbegrounded.AnESDprotectiondiodeishighlyrecommendediftheloop-throughisused.SCLU2BAV99Thecapacitorvalueissetto0.1uFbydefault.Thisvaluemayneedtobere-adjustedfordifferentdemodulators.0603C642.2u0603C632.2uVBATT_A1VBATT_A4CLKOUTAGC_CTRLIF+IF-VBATT_A2Vdd_IOH1HEADER_1x231234567891011121314151617181920212223SDASCLVBATT_A5Vdd_IOVBATT_A1Toimplementalow-costWi-Fifilter,replaceL19withthisT-filter.0402L47BKP1005HS121Analog/digitalgroundseparationisrequiredtominimizethespuriouscoupling.ThetwogroundsareconnectedthroughthegroundpaddleonthetoplayerofPCB.Pleaserefertothelayoutfilesfordetails.0402R150Vdd_A1.6V_DVBATT_A30402C710.1uU3BAV99VBATT_A50402R17DNPMxL201RFResistorTableforAddressSel