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LOG114EVM TI1 | Alldatasheet

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User's Guide SBOU110 –September 2011 LOG114EVM User Guide Thisuser'sguidedescribesthecharacteristics,operation,and use oftheLOG114EVM evaluationboard.It discusseshow to setup and configurethe board hardware,and reviewsvariousmethods of usingthe evaluationmodule (EVM).Throughoutthisdocument,thetermsevaluationboard,evaluationmodule,and EVM aresynonymous withtheLOG114EVM. Thisdocument alsoincludesan electricalschematic,printed circuitboard(PCB) layoutdrawings,and a partslistfortheEVM.

Overview www.ti.com

1 Overview

The LOG114 isa single-supply,high-speed,precisionlogarithmicamplifier.Thisdevicecomputes the logarithmorlog-ratioofan inputcurrentorvoltagerelativetoa referencecurrentorvoltage.The LOG114EVM (shown inFigure1)isa ready-to-useplatformforevaluatingtheperformanceofthe LOG114 invariousconfigurations.Thisdocument givesa generaloverviewoftheLOG114EVM, and providesa generaldescriptionofthefeaturesand functionstobe consideredwhileusingthisevaluation module. Figure1.LOG114EVM

1.1 GettingStarted

Testedatthefactoryovera widerangeofinputcurrents,theLOG114EVM comes readytouse and includesthisQuickStartUser’s Guide.Use oftheLOG114EVM requiresa 5-V power source,an input sourcesuch as a photodiodeorresistor,and a digitalvoltmeteroroscilloscope.

1.2 RelatedDocumentation from Texas Instruments

The followingdocuments provideinformationregardingTexas Instruments'integratedcircuitsand support toolsfortheLOG114EVM. Thisuser'sguideisavailablefromtheTIweb siteunderliteraturenumber SBOU110 .Any letterappended totheliteraturenumber correspondstothedocument revisionthatis currentatthetimeofthewritingofthisdocument.Newer revisionsmay be availablefromtheTIweb site, orcalltheTexas Instruments'LiteratureResponse Centerat(800)477-8924ortheProductInformation Centerat(972)644-5580.When ordering,identifythedocument by bothtitleand literaturenumber. RelatedDocumentation Document LiteratureNumber LOG114 ProductData Sheet SBOS301 LOG114 TINA-TIReferenceDesign SBOM384B LOG114 TINA-TISpiceModel SBOM385B

2 LOG114EVM User Guide SBOU110 –September 2011

+5 V 4.02 k/c87 R10 1 k/c87 2.5 V from LOG114 VREF VBIAS I =REF (2.5 V 2 V) 1 M /c45 /c87 = 500 nA I I V =LOGOUT 0.375 LOG 10/c183 + 2 V( ( www.ti.com LOG114EVM

2 LOG114EVM

The LOG114EVM comes completelyassembledand constructedtooperateon a single5-V power supply. The circuitused intheLOG114EVM isdesignedtooperateovera widerangeofinputcurrents(10nA to 10 mA) and scalestheoutputvoltagefrom1.15V to2.75V.Therearethreedistinctsectionstothe LOG114EVM circuit:a precisionlevelshifter,thesignalpath,and thehigh-currentlinearitycorrection section.Each sectionisdescribedbelowtofamiliarizeyou withthecircuitfunctionalityand operation.

2.1 LevelShifter

A precisionlevelshifterisrequiredtooperatetheLOG114 on a singlepower supply.On the LOG114EVM, thelevelshiftercircuitisconstructedby derivinga biasvoltageof2 V fromthe2.5-V voltagereferenceinternaltotheLOG114. Thislevelshiftof2 V isrequiredtokeep thenodes internalto theLOG114 properlybiasedwhen operatingfroma singlepower supply.ResistorsR9 and R10 forma voltagedividerthatisthenbufferedby theOPA365 amplifier.The outputoftheOPA365 isa fixedvoltage of2 V,independentofthepower-supplyvoltageorinputsignal.C2 isused tobypassthepower supplyfor theOPA365. The levelshiftercircuitisshown inFigure2. Figure2.LOG114EVM LevelShifter

2.2 SignalPath

The LOG114 has two inputs,I1 and I2.InputI1 isused fortheinputsignal(usuallyfroma photodiode)and I2 isa fixed-currentreferencesignal.Thisfixed-currentreferencesignalisderivedfromthe2.5-Vvoltage referenceinternaltotheLOG114 and the2-V outputfromthelevelshifter.The referencecurrentintoI2 is givenby Equation1. (1) The inputcurrentmust flowintoI1 and comes directlyfromtheanode ofa photodiode.Innon-optical applications,theinputcurrentcouldalsobe derivedfroma resistor,ora varietyofothersources(see Section3.4).Forproperoperation,each inputtotheLOG114 (I1 and I2)requiresthecurrenttoflowinto theLOG114. The outputfromtheLOG114 amplifierA3 iscalledVLOGOUT .The relationshipbetween VLOGOUT ,I1 and I2, and thebiasvoltagegeneratedby thelevelshifterisdescribedby Equation2. (2) 3SBOU110 –September 2011 LOG114EVM User Guide SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

1 M/c87

4.3 k/c87 10 k/c87 R5 10 k/c87 10 k/c87 VBIAS (from the Level Shifter) IPHOTO V/c45 VREF VOUT VREF VLOGOUT High-Current Linearity Correction Signal IREF VCC 5 V 100 nF I I V =LOGOUT 0.375 LOG 10/c183 + 2 V + I R1 S/c183( ( LOG114EVM www.ti.com The VLOGOUT outputisthenscaledby resistorsR7 and R8. These resistorsdividethesignalbefore combiningwiththehigh-currentlinearitycorrectionsection.Combiningtheinputsignaland linearity correctionsignalisaccomplishedwithamplifierA4 and resistorsR5 and R6. CapacitorC1 isused to bypassthepower supplyfortheLOG114. The signalpathcircuitisshown inFigure3. Figure3.LOG114EVM SignalPath

2.3 High-CurrentLinearityCorrection

The LOG114 iscapableofhandlinga widedynamicrangeofcurrents,fromlessthan100 pA ina carefully designedPCB to10 mA inhigh-currentapplications.Because theLOG114 was designedforhighspeeds, thetransistorsthatprovidefeedbackaroundamplifiersA1 and A2 withintheLOG114 have a smallseries resistance,R S.Thissmallseriesresistancecausesa deviationfromtheidealLOG114 transferfunctionat inputcurrentsthatexceed approximately1 mA. The modifiedequationforVLOGOUT thatshows this deviationfromtheidealisgiveninEquation3. (3)

4 LOG114EVM User Guide SBOU110 –September 2011

21.5 k/c87 VBIAS (from the Level Shifter) IPHOTO V/c45 VREF VERR www.ti.com LOG114EVM The high-currentlinearitycorrectioncircuit(refertoFigure4)createsan errorsignalthatisproportionalto inputcurrentI1 by usingR2, R3 and R4, and amplifierA5.ResistorR1 isused toproperlylevel-shiftthe resultingoutputsignal.The signalattheoutputfromamplifierA5 isthencoupledtotheinputofamplifier A4 ina manner thatsubtractstheerrorsignalfromtheoutputoftheEVM, VOUT . Figure4.High-CurrentLinearityCorrectionCircuit 5SBOU110 –September 2011 LOG114EVM User Guide SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

4.3 k/c87 10 k/c87 1 k/c87 10 k/c87 10 k/c87 5 k/c87 21.5 k/c87 3 /c87 IPHOTO V/c45 VREF VOUT VREF VBIAS VLOGOUT VLOG VERR VERR IREF VCC 5 V 100 nF OPA365 100 nFR10 1 k/c87 VREF 4.02 k/c87 LOG114EVM www.ti.com Figure5 shows theentirecircuitlayoutoftheLOG114EVM. Figure5.LOG114EVM Complete Circuit

6 LOG114EVM User Guide SBOU110 –September 2011

+5 V www.ti.com ConnectingtotheLOG114EVM

3 Connecting totheLOG114EVM

The LOG114 requiresonlya few connectionstooperate:a 5-V power supply,an inputsourcesuch as a photodiodeorresistor,and a digitalvoltmeteroroscilloscope.

3.1 ElectrostaticDischargeWarning

Many of the components on the LOG114EVM are susceptibleto damage by electrostaticdischarge(ESD).Customers are advisedto observeproperESD handlingprecautionswhen unpackingand handlingtheEVM, includingtheuse ofa groundedwriststrapatan approvedESD workstation.

3.2 Basic Connections

The connectionsfor5 V and groundareclearlymarked on theLOG114EVM PCB. Figure6 shows how to properlyconnectthepower supplytotheconnector. Figure6.Connecting the5V Power Supply

3.3 Using a Photodiode

An anode ofa photodiodecan be connectedtotheLOG114 by eitherusingthepads orpinsocketson the LOG114EVM. To use thehigh-currentlinearitycorrectioncircuitry,connectthephotodiodeas illustratedin Figure7. Figure7.Using a Photodiode withtheHigh-CurrentLinearityCorrectionCircuitry 7SBOU110 –September 2011 LOG114EVM User Guide SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

ConnectingtotheLOG114EVM www.ti.com Figure8 shows theconnectionsrequiredtobypassthehigh-currentlinearitycircuitry.Thisconnection resultsinplacingzerobiasacrossthephotodiode. Figure8.Using a Photodiode WithouttheHigh-CurrentLinearityCorrectionCircuitry A 0.5-Vreversebiascan be easilyplacedacrossthephotodiodeby connectingthephotodiodeas shown inFigure9.When connectingthephotodiodeinthisconfiguration,thehigh-currentlinearitycorrection circuitryisbypassed. Figure9.Applyinga 0.5-VReverse Bias tothePhotodiode

8 LOG114EVM User Guide SBOU110 –September 2011

I =1 (V V ) R REF BIAS/c45 www.ti.com ConnectingtotheLOG114EVM

3.4 Using a Resistor

Usinga resistorinsteadofa photodiodetocreatean inputcurrentisquitesimple.As Figure10 shows,a 1-MΩ resistorisplacedbetween VREF and theinputI1.Inthiscase,theinputcurrentI1 isdeterminedby Equation4. (4) Figure10.Using a ResistortoCreatean InputCurrent 9SBOU110 –September 2011 LOG114EVM User Guide SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

+ VIN I I V =LOGOUT 0.375 LOG 10/c183 + 2 V + I 501 /c87/c183( ( I I V = [LOG 0.375 LOG 10/c183 + I 50 ]1 /c87/c183 /c183 0.3 V/V + 2 V( ( (I 3) 1 k /c87 /c183 2 21.5 k/c87+ 5 k/c87/c183V = 2 +ERR V = 2 V VOUT LOG ERR /c45/c183 ConnectingtotheLOG114EVM www.ti.com Inthecase where I1 = 500 nA = IREF ,theVLOGOUT terminalisequaltothelevelshiftingbiasvoltageof2 V and theVOUT terminalisequalto1.5V.The circuitinFigure10,whileconvenientforcreatingan input current,does nottakeadvantageofthehigh-currentlinearitycorrectioncircuitry.To use thiscircuitry,a second power supplymust be used and configuredas shown inFigure11. Figure11.Using a Resistorand theHigh CurrentLinearityCorrectionCircuitry Changingtheinputvoltageortheresistorvaluechanges theinputcurrentI1 (I1 = VIN/R)and resultsina change fortheVLOGOUT terminalvoltageaccordingtoEquation5. (5) Forinputcurrentslessthan1 mA, thisequationsimplifiestoEquation2. The voltageattheVLOG terminalisgivenby Equation6: (6) The voltageattheVERR terminalisgivenby Equation7: (7) The voltageattheVOUT terminalisgivenby Equation8: (8)

10 LOG114EVM User Guide SBOU110 –September 2011

V = 2.5 VREF VERR VBIAS = 2.0 V 5 V Ground VLOGOUT VOUT VOUT VLOG High Current Error Protection Input Input I1 5 V Ground Ground www.ti.com UsingtheLOG114EVM

4 Using theLOG114EVM

Once theLOG114EVM has power appliedand an inputsignal,easy accessterminalpinsallowforquickly evaluatingthecircuitperformance.Connecta digitalvoltmeteroroscilloscopetoany oftheterminalsto make themeasurements.Figure12 isa referenceguidetotheLOG114EVM and itsrelatedcomponents. Figure12.LOG114EVM Components 11SBOU110 –September 2011 LOG114EVM User Guide SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

1.5 2.5 10n 100n 1 10 100 1m 10m/c109 /c109 /c109 Input Current (A) Output Voltage (V) Uncompensated Output Compensated Output VerifyingResults www.ti.com

5 VerifyingResults

Making measurements on theLOG114EVM isfastand easy.Connecta digitalvoltmeteroroscilloscopeto theterminalofinterestand recordtheresults.Includedwiththegraphofmeasured resultsisa tableof resultsforcommon valuesofinputcurrents.InFigure13,two curvesareshown.Bothcurvesuse a resistorinputand VOUT isrecordedas a functionofinputcurrent.The compensated (red)curveconnects theresistoras shown inFigure11 and uses thehigh-currentlinearitycorrectioncircuitry.The uncompensated curve(blue)uses theresistorconnectedtoI1 and VREF as shown inFigure10. Figure13.LOG114EVM Measured Results Table1 listsseveraltypicalresultsobtainedwithvariousinputvoltages. Table1.LOG114EVM TypicalResults Uncompensated Compensated Input VLOGOUT (V) VOUT (V) VLOGOUT (V) VOUT (V) 10 nA 1.36 1.15 1.36 1.15 100 nA 1.74 1.38 1.74 1.38 1 μA 2.11 1.60 2.11 1.60 10 μA 2.49 1.83 2.49 1.83 100 μA 2.87 2.06 2.87 2.06 1 mA 3.29 2.31 3.29 2.30 10 mA 4.11 2.82 4.11 2.67

12 LOG114EVM User Guide SBOU110 –September 2011

C7 4.7uF VCC Vlog R7 10k R6 10k R1 21.3k R5 10k R3 1k R2 6 R1 1 1M R10 1k VCC R4 5k R8 4.27k R9 4.02k Vref_GND Vcm_IN V - Com Vlogout +IN4 -IN4 1 1 Vo_4 +IN5 -IN5 Vo_5 Vref NC GND 17 U1 LOG 1 14 TP5 Vcc TP6 GND TP4 Vlog TP3 Vout TP1 Vbias TP2 VERR 1 2 T1 T_STRIP2 TP7 BNC_VERT 6D1 PIPD TP9 Vlogout TP8 Vref V ref Vbias V ref Vbias Vlog -IN5 -IN5 OPA365 www.ti.com LOG114EVM Documentation

6 LOG114EVM Documentation

Thissectioncontainsthecompletebillofmaterialsand PCB layoutfortheLOG114EVM. NOTE: These boardlayoutsarenottoscale.These image areintendedtoshow how theboardis laidout;theyarenotintendedtobe used formanufacturingLOG114EVM PCBs.

6.1 Schematic

Figure14 shows theschematicfortheLOG114EVM board Figure14.LOG114EVM Board Schematic 13SBOU110 –September 2011 LOG114EVM User Guide SubmitDocumentationFeedback Copyright© 2011,Texas InstrumentsIncorporated

LOG114EVM Documentation www.ti.com

6.2 PCB Layout

Figure15 throughFigure17 show thePCB layoutoftheLOG114EVM. Figure15.LOG114EVM: Top Side Composite Drawing Figure16.LOG114EVM: Top Copper Layer Figure17.LOG114EVM: Bottom Copper Layer

14 LOG114EVM User Guide SBOU110 –September 2011

www.ti.com LOG114EVM Documentation

6.3 BillofMaterials

Table2 liststhebillofmaterialsfortheLOG114EVM Table2.LOG114 BillofMaterials ItemNo Count Value Ref Des Description MFR Mfr PartNumber 1 1 21.5kΩ R1 Resistor,21.5kΩ 1/10W 1% 0603 SMD Yageo RC0603FR-0721K5L 2 1 3 Ω R2 Resistor,3.0Ω 1/10W 5% 0603 Panasonic-ECG ERJ-3GEYJ3R0V 3 2 1 kΩ R3, R10 Resistor,1.0kΩ .25W 5% 0603 SMD Vishay/Dale CRCW06031K00JNEAHP 4 1 4.99kΩ R4 Resistor,4.99kΩ 1/10W 1% 0603 SMD Panasonic ERJ-3EKF4991V 5 3 10 kΩ R5, R6, R7 Resistor,10.0kΩ 1/10W 1% 0603 SMD Panasonic ERJ-3EKF1002VRES 6 1 4.3kΩ R8 Resistor,4.3kΩ 1/16W .5% 0603 SMD Susumu RR0816P-432-D 7 1 4.02kΩ R9 Resistor,4.02kΩ 1/10W 1% 0603 SMD Panasonic ERJ-3EKF4021V 8 1 1 M Ω R11 Resistor,1.00M Ω 1/10W 1% 0603 SMD Panasonic ERJ-3EKF1004V 9 1 4.7μF C7 Capacaitor,Tantalum4.7μF 35V 10% SM AVX Corporation TAJC475K035RNJ 10 1 0.1μF C3 Capacaitor,Ceramic.100μF 25V X7R 0603 Yageo CC0603KRX7R8BB104 11 2 100 nF C1, C2 Capacaitor,Ceramic1000 pF 25V Y5V 0603 MurataElectronics GRM188F51E102ZA01D NorthAmerica 12 1 — U1 LOG114 Texas Instruments LOG114AIRGVT 13 1 — U2 OPA365 Texas Instruments OPA365AIDBVR 14 1 BNC TP7 Connector,JackBNC Vert50 Ω Tyco Electronics 5227699-1 15 1 — T1 PCB TerminalBlock5 MM 2-Pos On-Shore Technology ED300/2 Inc 16 9 N/A TestPoints, Connector,Header 1-Pos.100" SglGold Samtec TSW-101-07-G-S All 17 4 Standoff — Standoffs,Hex ,4-40Threaded,0.500-in. Keystone 2203 length,0.250-inOD, Aluminum IriditeFinish 18 4 Screw — Screw,Machine,Phillips4-40x1/4SS B & F Fastener PMSSS 440 0025 PH Supply 19 1 N/A D1 Do notinstall — — 15SBOU110 –September 2011 LOG114EVM User Guide 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 withintheinputvoltagerangeof±2.4Vto± 5.5V and theoutputvoltagerangeof±1.8V to±4.9 V . 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 temperaturesgreaterthan+25°C. The EVM isdesignedto operateproperlywithcertaincomponents above +25°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

EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module (EVM) under the following conditions: The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. 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. Please read the User's Guide and, specifically, the Warnings and Restrictions notice in the User's Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visitwww.ti.com/eshor contact TI. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. REGULATORY COMPLIANCE INFORMATION As noted in the EVM User’s Guide and/or EVM itself, this EVM and/or accompanying hardware may or may not be subject to the Federal Communications Commission (FCC) and Industry Canada (IC) rules. For EVMs not subject to the above rules, this evaluation board/kit/module is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end product fit for general consumer use. It generates, uses, and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or ICES-003 rules, which are designed to provide reasonable protection against radio frequency interference. Operation of the equipment may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. General Statement for EVMs including a radio User Power/Frequency Use Obligations: This radio is intended for development/professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability of this EVM and its development application(s) must comply with local laws governing radio spectrum allocation and power limits for this evaluation module. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by Texas Instruments unless user has obtained appropriate experimental/development licenses from local regulatory authorities, which is responsibility of user including its acceptable authorization. For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant Caution This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

FCC Interference Statement for Class B EVM devices This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help. For EVMs annotated as IC – INDUSTRY CANADA Compliant This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs including radio transmitters This device complies with Industry Canada licence-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Concerning EVMs including detachable antennas Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should This radio transmitter has been approved by Industry Canada to operate with the antenna types listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. Concernant les EVMs avec appareils radio Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Concernant les EVMs avec antennes détachables Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope rayonnée équivalente Le présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER

【【Important Notice for Users of this Product in Japan】】 This development kit is NOT certified as Confirming to Technical Regulations of Radio Law of Japan If you use this product in Japan, you are required by Radio Law of Japan to follow the instructions below with respect to this product: 1. Use this product in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for Enforcement of Radio Law of Japan, 2. Use this product only after you obtained the license of Test Radio Station as provided in Radio Law of Japan with respect to this product, or 3. Use of this product only after you obtained the Technical Regulations Conformity Certification as provided in Radio Law of Japan with respect to this product. Also, please do not transfer this product, unless you give the same notice above to the transferee. Please note that if you could not follow the instructions above, you will be subject to penalties of Radio Law of Japan. Texas Instruments Japan Limited (address) 24-1, Nishi-Shinjuku 6 chome, Shinjuku-ku, Tokyo, Japan http://www.tij.co.jp 【ご使用にあたっての注】本開発キットは技術基準適合証明を受けておりません。本製品のご使用に際しては、電波法遵守のため、以下のいずれかの措置を取っていただく必要がありますのでご注意ください。 1. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用いただく。 2. 実験局の免許を取得後ご使用いただく。 3. 技術基準適合証明を取得後ご使用いただく。なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。日本テキサス・インスツルメンツ株式会社東京都新宿区西新宿６丁目２４番１号西新宿三井ビル http://www.tij.co.jp SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER

EVALUATION BOARD/KIT/MODULE (EVM) WARNINGS, RESTRICTIONS AND DISCLAIMERS For Feasibility Evaluation Only, in Laboratory/Development Environments.Unless otherwise indicated, this EVM is not a finished electrical equipment and not intended for consumer use. It is intended solely for use for preliminary feasibility evaluation in laboratory/development environments by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems and subsystems. It should not be used as all or part of a finished end product. Your Sole Responsibility and Risk. You acknowledge, represent and agree that: 1. You have unique knowledge concerning Federal, State and local regulatory requirements (including but not limited to Food and Drug Administration regulations, if applicable) which relate to your products and which relate to your use (and/or that of your employees, affiliates, contractors or designees) of the EVM for evaluation, testing and other purposes. 2. You have full and exclusive responsibility to assure the safety and compliance of your products with all such laws and other applicable regulatory requirements, and also to assure the safety of any activities to be conducted by you and/or your employees, affiliates, contractors or designees, using the EVM. Further, you are responsible to assure that any interfaces (electronic and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard. 3. You will employ reasonable safeguards to ensure that your use of the EVM will not result in any property damage, injury or death, even if the EVM should fail to perform as described or expected. 4. You will take care of proper disposal and recycling of the EVM’s electronic components and packing materials. Certain Instructions. It is important to operate this EVM within TI’s recommended specifications and environmental considerations per the user guidelines. Exceeding the specified EVM ratings (including but not limited to input and output voltage, current, power, and environmental ranges) may cause property damage, personal injury or death. If there are questions concerning these ratings please contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during normal operation, please be aware that these devices may be very warm to the touch. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use these EVMs. Agreement to Defend, Indemnify and Hold Harmless.You agree to defend, indemnify and hold TI, its licensors and their representatives harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of or in connection with any use of the EVM that is not in accordance with the terms of the agreement. This obligation shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if the EVM fails to perform as described or expected. Safety-Critical or Life-Critical Applications.If you intend to evaluate the components for possible use in safety critical applications (such as life support) where a failure of the TI product would reasonably be expected to cause severe personal injury or death, such as devices which are classified as FDA Class III or similar classification, then you must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2012, Texas Instruments Incorporated

Texas InstrumentsIncorporatedand itssubsidiaries(TI)reservetherighttomake corrections,enhancements,improvementsand other changes toitssemiconductorproductsand servicesperJESD46, latestissue,and todiscontinueany productorserviceperJESD48, latest issue.Buyersshouldobtainthelatestrelevantinformationbeforeplacingordersand shouldverifythatsuch informationiscurrentand complete.Allsemiconductorproducts(alsoreferredtohereinas “components”)aresoldsubjecttoTI’s termsand conditionsofsale suppliedatthetimeoforderacknowledgment. TIwarrantsperformanceofitscomponents tothespecificationsapplicableatthetimeofsale,inaccordancewiththewarrantyinTI’s terms and conditionsofsaleofsemiconductorproducts.Testingand otherqualitycontroltechniquesareused totheextentTIdeems necessary tosupportthiswarranty.Exceptwhere mandated by applicablelaw,testingofallparametersofeach component isnotnecessarily performed. TIassumes no liabilityforapplicationsassistanceorthedesignofBuyers’products.Buyersareresponsiblefortheirproductsand applicationsusingTIcomponents.To minimizetherisksassociatedwithBuyers’productsand applications,Buyersshouldprovide adequatedesignand operatingsafeguards. TIdoes notwarrantorrepresentthatany license,eitherexpressorimplied,isgrantedunderany patentright,copyright,mask work right,or otherintellectualpropertyrightrelatingtoany combination,machine,orprocessinwhichTIcomponents orservicesareused.Information publishedby TIregardingthird-partyproductsorservicesdoes notconstitutea licensetouse such productsorservicesora warrantyor endorsementthereof.Use ofsuch informationmay requirea licensefroma thirdpartyunderthepatentsorotherintellectualpropertyofthe thirdparty,ora licensefromTIunderthepatentsorotherintellectualpropertyofTI. ReproductionofsignificantportionsofTIinformationinTIdatabooks ordatasheetsispermissibleonlyifreproductioniswithoutalteration and isaccompaniedby allassociatedwarranties,conditions,limitations,and notices.TIisnotresponsibleorliableforsuch altered documentation.Informationofthirdpartiesmay be subjecttoadditionalrestrictions. ResaleofTIcomponents orserviceswithstatementsdifferentfromorbeyond theparametersstatedby TIforthatcomponent orservice voidsallexpressand any impliedwarrantiesfortheassociatedTIcomponent orserviceand isan unfairand deceptivebusinesspractice. TIisnotresponsibleorliableforany such statements. Buyeracknowledgesand agreesthatitissolelyresponsibleforcompliancewithalllegal,regulatoryand safety-relatedrequirements concerningitsproducts,and any use ofTIcomponents initsapplications,notwithstandingany applications-relatedinformationorsupport thatmay be providedby TI.Buyerrepresentsand agreesthatithas allthenecessaryexpertisetocreateand implementsafeguardswhich anticipatedangerousconsequencesoffailures,monitorfailuresand theirconsequences,lessenthelikelihoodoffailuresthatmightcause harm and takeappropriateremedialactions.BuyerwillfullyindemnifyTIand itsrepresentativesagainstany damages arisingoutoftheuse ofany TIcomponents insafety-criticalapplications. Insome cases,TIcomponents may be promotedspecificallytofacilitatesafety-relatedapplications.Withsuch components,TI’s goalisto helpenablecustomerstodesignand createtheirown end-productsolutionsthatmeet applicablefunctionalsafetystandardsand requirements.Nonetheless,such components aresubjecttotheseterms. No TIcomponents areauthorizedforuse inFDA ClassIII(orsimilarlife-criticalmedicalequipment)unlessauthorizedofficersoftheparties have executeda specialagreementspecificallygoverningsuch use. OnlythoseTIcomponents whichTIhas specificallydesignatedas militarygradeor“enhanced plastic”aredesignedand intendedforuse in military/aerospaceapplicationsorenvironments.Buyeracknowledgesand agreesthatany militaryoraerospaceuse ofTIcomponents whichhave not been so designatedissolelyattheBuyer's risk,and thatBuyerissolelyresponsibleforcompliancewithalllegaland regulatoryrequirementsinconnectionwithsuch use. TIhas specificallydesignatedcertaincomponents whichmeet ISO/TS16949 requirements,mainlyforautomotiveuse.Components which have notbeen so designatedareneitherdesignednorintendedforautomotiveuse;and TIwillnotbe responsibleforany failureofsuch components tomeet such requirements. Products Applications Audio www.ti.com/audio Automotiveand Transportationwww.ti.com/automotive Amplifiers amplifier.ti.com Communicationsand Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP ® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energyand Lighting www.ti.com/energy Clocksand Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space,Avionicsand Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Videoand Imaging www.ti.com/video RFID www.ti-rfid.com OMAP ApplicationsProcessors www.ti.com/omap TIE2E Community e2e.ti.com WirelessConnectivity www.ti.com/wirelessconnectivity MailingAddress:Texas Instruments,PostOfficeBox 655303,Dallas,Texas 75265 Copyright© 2012,Texas InstrumentsIncorporated

Summary

LOG114EVM User Guide

Description