SLWU073

TRF3705EVM TI1 | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 7

Technical content

User's Guide SLWU073 –October2011 TRF3705EVM EvaluationModule This user'sguide providesinstructionsforevaluatingthe TRF3705 modulatorwith a TRF3705EVM evaluationmodule. The TRF3705 is a quadraturemodulatorforup-convertingthe in-phase(I)and quadrature-phase(Q) signalsto RF signalsin the transmitchain,typicallyused between the digital-to-analogconverterand theRF power amplifier.

Contents

1SLWU073 –October2011 TRF3705EVM EvaluationModule SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

Introduction www.ti.com

1 Introduction

1.1 System Block Diagram

The basicradiosystemblockdiagraminFigure1 shows where theTRF3705 fitsinthetransmitter. Figure1.TRF3705 System Block Diagram

1.2 EVM Jumper Configuration

Table1 liststhelocationsoftheinstalledjumpersinthedefaultconfigurationoftheevaluationmodule (EVM). Table1.DefaultJumper Connections Jumper Description Default Notes JP1 Power Down Pins2-3 Powered On JP2 Gain Control Pins2-3 Low Gain Mode

2 TRF3705EVM EvaluationModule SLWU073 –October2011

SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

V _MODCC Spectrum Analyzer Power Supply V _LOCC www.ti.com TRF3705 EVM TestConfiguration

2 TRF3705 EVM TestConfiguration

2.1 TestBlock Diagram

Figure2 shows thetestsetupforgeneraltestingoftheTRF3705. Figure2.TestSetup Block Diagram

2.2 TestEquipment

The followingequipmentisrequiredforcompletingRF Testing:

• Power supplywithcurrentreadout— AgilentE3631 orequivalent
• SignalgeneratorforLO inputsignal— AgilentE4438C orequivalent
• Arbitrarywaveform generator— AgilentE4438C orequivalent
• Spectrumanalyzer— AgilentE4440A orequivalent

2.3 Calibration

The RF cablesmust be good qualityRF cablesdue tothehigh-frequencysignals.

• Measure theinsertionlossoftheRF outputcable,and use thisvaluetocompensate forthemeasured outputpower.
• Measure theinsertionlossoftheLO inputcable,and use thisvaluetocompensate forthedesiredLO power. 3SLWU073 –October2011 TRF3705EVM EvaluationModule SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

EVM TestProcedure www.ti.com

3 EVM TestProcedure

3.1 Single-ToneOutput Power Test

1. Connectpower supplies:

• SetVCC supplyto3.3V and setthecurrentlimitto500 mA.
• ConnecttheVCC supplytoheaderTP2. ConnectthegroundtoTP1. 2. Use a suitable50-Ω outputsignalgeneratortosupplytheLO signalwith0 dBm withthecableloss compensated and thedesiredfrequencyfLO = 1 GHz toJ1;terminateJ2 with50 Ω toground. 3. Use a digital-to-analogconverteroran arbitrarywaveform generatortoprovideI/Qinputsignals.A typicalsetupisas follows:a 1-Vpp sinusoidalwave indifferentialmode forbothIand Q signalswitha frequencyoff1,a dc offsetof0.25V,and an outputimpedance of50 Ω.Use an AgilentE4438C vector signalgeneratortoprovideI/Qsignalsinthefollowingexample.
• PressPreset.
• PressMode → More (1of2)→ Multitone.
• PressInitializeTable→ Number ofTones → 12 → Enter.
• PressFreq Spacing → 1 → MHz.
• PressDone.
• Highlighteach row ofthefirst11 rows,and pressToggle Statetoturntheselectedtoneoff;keep onlythelastrow withtheBB frequencyof5.5MHz. Now, 5.5-MHz,single-tone,BB I/Qsignalsare configuredforE4438C.
• PressMultitoneOff/OnuntilOn ishighlightedtogeneratethemultitonewaveform.
• ConnectIsignalstoJ4 (I+)and J3 (I–),and theQ signalstoJ5 (Q–)and J6 (Q+).
• AdjustthedifferentialIorQ voltageleveltobe 1 Vpp by pressingMode → I/Q→ I/QOutput Control→ I/QOutput Atten→ enter9 → PressdB .The voltagecan be measured by an oscilloscope.Note thatthedifferentialvoltageistwicethesingle-endedvoltage.
• Setthecommon-mode voltage(CMV) ofE4438A to0.25V by pressingMode → I/Q→ I/QOutput Control→ Common Mode I/QOffset→ 250 → mV .Use a dc voltagemetertomonitorthedc common voltageattheinputsofIand Q, and fine-tunetheCMV settinguntilitismeasured tobe 250 mV. 4. Verifythatjumperconnectionofpin2 and pin3 on JP2 tosetdeviceinlowgainmode 5. Verifythatjumperconnectionofpin2 and pin3 atJP1 toensurethatpower down isnotengaged. 6. MonitorVcc atTP1 toensurethatVcc is3.3V.Verifythatthecurrentdraw isabout305 mA ± 15 mA. 7. Connecta spectrumanalyzertotheSMA connectormarked RFOUT (J7),and measure theTRF3705 outputpower atfLO + f1 = 1005.5MHz. The RF power must be 3.5dBm ± 1 dBm aftertheRF cable lossiscompensated.

4 TRF3705EVM EvaluationModule SLWU073 –October2011

SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

P0_low P0_high PIM3_low PIM3_low PIM2 f -fLO 2 f -fLO 1 fLO f +(f -f )LO 2 1 f +fLO 1 f +fLO 2 www.ti.com EVM TestProcedure

3.2 Two-Tone OIP3 Test

The outputthird-orderinterceptpoint(OIP3)isa measure ofthelinearityperformanceofa nonlinear device.Itismeasured by a two-tonetest.The followingexercisemeasures OIP3 followingalllistedsteps inSection3.1. 1. PressMode → More (1of2)→ Multitone. 2. Highlightrow 11 forfrequencyoffset= 4.5MHz, pressToggle State,and thenpressApply Multitone toturnon a 4.5-MHz tone.Now, two toneswithequalamplitudeand frequencies,f1 = 4.5and f2 = 5.5MHz, areconfiguredforE4438C. 3. Measure theRF power ofbothRF tones,P0,whichmust be between –1.8dBm to–2.8dBm. 4. Measure thepower,PIM3,ofthethird-orderintermodulationproductassociatedwitheach RF tone.Itis approximately–66.5dBm afterthecablelosscompensation. 5. OIP3 can be calculatedby theequationOIP3 = P0 + (P0 – PIM3)/2.The worstOIP3 associatedwith eitherthelow-orthehigh-frequencytoneisselectedas theOIP3 ofthemodulator.The OIP3 at1 GHz isapproximately–29.8dBm ± 1 dBm. Cautionmust be takenforaccuratelymeasuringthesmallPIM3 when thelargeP0 ispresent.Itishelpfultoreducethespan and RBW settingsofthespectrum analyzerso thattheIM3 component isatleast20 dB above thenoisefloor,as wellas by increasing theRF attenuatorsettinguntilPIM3 isno longervaryingwithincreasedRF attenuationsetting. Figure3.Two-Tone OIP3 Output Spectrum 5SLWU073 –October2011 TRF3705EVM EvaluationModule SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

EvaluationBoard/KitImportantNotice Texas Instruments(TI)providestheenclosedproduct(s)underthefollowingconditions: Thisevaluationboard/kitisintendedforuse forENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and isnotconsideredby TItobe a finishedend-productfitforgeneralconsumer use.Personshandlingthe product(s)must have electronicstrainingand observegood engineeringpracticestandards.As such,thegoods beingprovidedare notintendedtobe completeintermsofrequireddesign-,marketing-,and/ormanufacturing-relatedprotectiveconsiderations, includingproductsafetyand environmentalmeasures typicallyfoundinend productsthatincorporatesuch semiconductor components orcircuitboards.Thisevaluationboard/kitdoes notfallwithinthescope oftheEuropean Uniondirectivesregarding electromagneticcompatibility,restrictedsubstances(RoHS),recycling(WEEE), FCC, CE orUL, and thereforemay notmeet the technicalrequirementsofthesedirectivesorotherrelateddirectives. Shouldthisevaluationboard/kitnotmeet thespecificationsindicatedintheUser’s Guide,theboard/kitmay be returnedwithin30 days fromthedateofdeliveryfora fullrefund.THE FOREGOING WARRANTY ISTHE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND ISIN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED,OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The userassumes allresponsibilityand liabilityforproperand safehandlingofthegoods.Further,theuserindemnifiesTIfromall claimsarisingfromthehandlingoruse ofthegoods.Due totheopen constructionoftheproduct,itistheuser’s responsibilityto takeany and allappropriateprecautionswithregardtoelectrostaticdischarge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TIcurrentlydealswitha varietyofcustomersforproducts,and thereforeourarrangementwiththeuserisnot exclusive. TIassumes no liabilityforapplicationsassistance,customer productdesign,softwareperformance,or infringementof patentsor servicesdescribedherein. PleasereadtheUser’s Guide and,specifically,theWarningsand RestrictionsnoticeintheUser’s Guide priortohandlingthe product.Thisnoticecontainsimportantsafetyinformationabouttemperaturesand voltages.Foradditionalinformationon TI’s environmentaland/orsafetyprograms,pleasecontacttheTIapplicationengineerorvisitwww.ti.com/esh. No licenseisgrantedunderany patentrightorotherintellectualpropertyrightofTIcoveringorrelatingtoany machine,process,or combinationinwhichsuch TIproductsorservicesmightbe orareused. FCC Warning Thisevaluationboard/kitisintendedforuse forENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and isnotconsideredby TItobe a finishedend-productfitforgeneralconsumer use.Itgenerates,uses,and can radiateradiofrequencyenergyand has notbeen testedforcompliancewiththelimitsofcomputingdevicespursuanttopart15 ofFCC rules,whicharedesignedtoprovidereasonableprotectionagainstradiofrequencyinterference.Operationofthis equipmentinotherenvironmentsmay cause interferencewithradiocommunications,inwhichcase theuserathisown expense willbe requiredtotakewhatevermeasures may be requiredtocorrectthisinterference. EVM Warnings and Restrictions ItisimportanttooperatethisEVM withintheinputvoltagerangeof0 V to3.6V and theoutputvoltagerangeof0 V to3.6V . Exceedingthespecifiedinputrangemay cause unexpectedoperationand/orirreversibledamage totheEVM. Ifthereare questionsconcerningtheinputrange,pleasecontacta TIfieldrepresentativepriortoconnectingtheinputpower. Applyingloadsoutsideofthespecifiedoutputrangemay resultinunintendedoperationand/orpossiblepermanentdamage tothe EVM. PleaseconsulttheEVM User's Guide priortoconnectingany loadtotheEVM output.Ifthereisuncertaintyas totheload specification,pleasecontacta TIfieldrepresentative. Duringnormaloperation,some circuitcomponents may have case temperaturesgreaterthan55° C. The EVM isdesignedto operateproperlywithcertaincomponents above 55° C as longas theinputand outputrangesaremaintained.These components includebutarenotlimitedtolinearregulators,switchingtransistors,pass transistors,and currentsense resistors.These typesof devicescan be identifiedusingtheEVM schematiclocatedintheEVM User's Guide.When placingmeasurement probesnear thesedevicesduringoperation,pleasebe aware thatthesedevicesmay be verywarm tothetouch. MailingAddress:Texas Instruments,PostOfficeBox 655303,Dallas,Texas 75265 Copyright© 2011,Texas InstrumentsIncorporated

Texas InstrumentsIncorporatedand itssubsidiaries(TI)reservetherighttomake corrections,modifications,enhancements,improvements, and otherchanges toitsproductsand servicesatany timeand todiscontinueany productorservicewithoutnotice.Customersshould obtainthelatestrelevantinformationbeforeplacingordersand shouldverifythatsuch informationiscurrentand complete.Allproductsare soldsubjecttoTI’s termsand conditionsofsalesuppliedatthetimeoforderacknowledgment. TIwarrantsperformanceofitshardwareproductstothespecificationsapplicableatthetimeofsaleinaccordancewithTI’s standard warranty.Testingand otherqualitycontroltechniquesareused totheextentTIdeems necessarytosupportthiswarranty.Exceptwhere mandated by governmentrequirements,testingofallparametersofeach productisnotnecessarilyperformed. TIassumes no liabilityforapplicationsassistanceorcustomerproductdesign.Customersareresponsiblefortheirproductsand applicationsusingTIcomponents.To minimizetherisksassociatedwithcustomerproductsand applications,customersshouldprovide adequatedesignand operatingsafeguards. TIdoes notwarrantorrepresentthatany license,eitherexpressorimplied,isgrantedunderany TIpatentright,copyright,mask work right, orotherTIintellectualpropertyrightrelatingtoany combination,machine,orprocessinwhichTIproductsorservicesareused.Information publishedby TIregardingthird-partyproductsorservicesdoes notconstitutea licensefromTItouse such productsorservicesora warrantyorendorsementthereof.Use ofsuch informationmay requirea licensefroma thirdpartyunderthepatentsorotherintellectual propertyofthethirdparty,ora licensefromTIunderthepatentsorotherintellectualpropertyofTI. ReproductionofTIinformationinTIdatabooks ordatasheetsispermissibleonlyifreproductioniswithoutalterationand isaccompanied by allassociatedwarranties,conditions,limitations,and notices.Reproductionofthisinformationwithalterationisan unfairand deceptive businesspractice.TIisnotresponsibleorliableforsuch altereddocumentation.Informationofthirdpartiesmay be subjecttoadditional restrictions. ResaleofTIproductsorserviceswithstatementsdifferentfromorbeyond theparametersstatedby TIforthatproductorservicevoidsall expressand any impliedwarrantiesfortheassociatedTIproductorserviceand isan unfairand deceptivebusinesspractice.TIisnot responsibleorliableforany such statements. TIproductsarenotauthorizedforuse insafety-criticalapplications(suchas lifesupport)where a failureoftheTIproductwouldreasonably be expectedtocause severepersonalinjuryordeath,unlessofficersofthepartieshave executedan agreementspecificallygoverning such use.Buyersrepresentthattheyhave allnecessaryexpertiseinthesafetyand regulatoryramificationsoftheirapplications,and acknowledgeand agreethattheyaresolelyresponsibleforalllegal,regulatoryand safety-relatedrequirementsconcerningtheirproducts and any use ofTIproductsinsuch safety-criticalapplications,notwithstandingany applications-relatedinformationorsupportthatmay be providedby TI.Further,Buyersmust fullyindemnifyTIand itsrepresentativesagainstany damages arisingoutoftheuse ofTIproductsin such safety-criticalapplications. TIproductsareneitherdesignednorintendedforuse inmilitary/aerospaceapplicationsorenvironmentsunlesstheTIproductsare specificallydesignatedby TIas military-gradeor"enhanced plastic." Onlyproductsdesignatedby TIas military-grademeet military specifications.Buyersacknowledgeand agreethatany such use ofTIproductswhichTIhas notdesignatedas military-gradeissolelyat theBuyer's risk,and thattheyaresolelyresponsibleforcompliancewithalllegaland regulatoryrequirementsinconnectionwithsuch use. TIproductsareneitherdesignednorintendedforuse inautomotiveapplicationsorenvironmentsunlessthespecificTIproductsare designatedby TIas compliantwithISO/TS 16949 requirements.Buyersacknowledgeand agreethat,iftheyuse any non-designated productsinautomotiveapplications,TIwillnotbe responsibleforany failuretomeet such requirements. FollowingareURLs where you can obtaininformationon otherTexas Instrumentsproductsand applicationsolutions: Products Applications Audio www.ti.com/audio Communicationsand Telecom www.ti.com/communications Amplifiers amplifier.ti.com Computers and Peripherals www.ti.com/computers Data Converters dataconverter.ti.com Consumer Electronics www.ti.com/consumer-apps DLP ® Products www.dlp.com Energyand Lighting www.ti.com/energy DSP dsp.ti.com Industrial www.ti.com/industrial Clocksand Timers www.ti.com/clocks Medical www.ti.com/medical Interface interface.ti.com Security www.ti.com/security Logic logic.ti.com Space,Avionicsand Defense www.ti.com/space-avionics-defense Power Mgmt power.ti.com Transportationand Automotive www.ti.com/automotive Microcontrollers microcontroller.ti.com Videoand Imaging www.ti.com/video RFID www.ti-rfid.com OMAP MobileProcessors www.ti.com/omap WirelessConnectivity www.ti.com/wirelessconnectivity TIE2E Community Home Page e2e.ti.com MailingAddress:Texas Instruments,PostOfficeBox 655303,Dallas,Texas 75265 Copyright© 2011,Texas InstrumentsIncorporated