Product Sample & Technical Tools & Support & Folder Buy Documents Software Community LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 LMH6554 2.8-GHz Ultra Linear Fully Differential Amplifier 1 Features 3 Description • Small-SignalBandwidth2.8GHz The LMH6554 device is a high-performance fully 1 differential amplifier designed to provide the • 2V Large-SignalBandwidth1.8GHz PP exceptional signal fidelity and wide large-signal • 0.1dBGainFlatness830MHz bandwidth necessary for driving 8- to 16-bit high- • OIP3at150MHz46.5dBm speed data acquisition systems. Using TI’s proprietary differential current mode input stage • HD2/HD3at75MHz–96/ –97dBc architecture, the LMH6554 has unity gain, small- • InputNoiseVoltage0.9nV/√Hz signal bandwidth of 2.8 GHz and allows operation at • InputNoiseCurrent11pA/√Hz gains greater than unity without sacrificing response flatness, bandwidth, harmonic distortion, or output • SlewRate6200V/μs noiseperformance. • Power260mW The low-impedance differential output of the device is • TypicalSupplyCurrent52mA designed to drive ADC inputs and any intermediate • 14-LeadUQFNPackage filter stage. The LMH6554 delivers 16-bit linearity up to 75 MHz when driving 2-V peak-to-peak into loads 2 Applications aslowas200Ω. • DifferentialADCDriver The LMH6554 is fabricated in TI's advanced • Single-EndedtoDifferentialConverter complementaryBiCMOSprocessandisavailableina space-saving 14-lead UQFN package for higher • High-SpeedDifferentialSignaling performance. • IF/RFandBasebandGainBlocks • SAWFilterBuffer/Driver DeviceInformation(1) • OscilloscopeProbes PARTNUMBER PACKAGE BODYSIZE(NOM) • AutomotiveSafetyApplications LMH6554 UQFN(14) 2.50mm×2.50mm • VideoOverTwistedPair (1) For all available packages, see the orderable addendum at theendofthedatasheet. • DifferentialLineDriver 4 Typical Application Schematic RS = 50: 91: 200: VSa C V+ 76.8: AC-Coupled 50: ADC Source 0.1 PF + - VCM LMH6554 Up To 16-Bit Data Converter + - 91: 50: 30: V- VCMO 0.1 PF 0.1 PF 200: VEN 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com Table of Contents 1 Features.................................................................. 1 9 ApplicationandImplementation........................ 13 2 Applications........................................................... 1 9.1 ApplicationInformation............................................13 3 Description............................................................. 1 9.2 TypicalApplications................................................13 4 TypicalApplicationSchematic............................. 1 10 PowerSupplyRecommendations..................... 20 5 RevisionHistory..................................................... 2 10.1 PowerSupplyBypassing......................................20 6 PinConfigurationandFunctions......................... 3 11 Layout................................................................... 21 11.1 LayoutGuidelines.................................................21 7 Specifications......................................................... 4 11.2 LayoutExample....................................................21 7.1 AbsoluteMaximumRatings .....................................4 11.3 PowerDissipation.................................................22 7.2 ESDRatings..............................................................4 11.4 ESDProtection......................................................22 7.3 RecommendedOperatingConditions.......................4 12 DeviceandDocumentationSupport................. 23 7.4 ThermalInformation..................................................4 7.5 ElectricalCharacteristics:+5V.................................5 12.1 DeviceSupport......................................................23 7.6 TypicalPerformanceCharacteristicsV =±2.5V....7 12.2 DocumentationSupport........................................23 S 12.3 Trademarks...........................................................23 8 DetailedDescription............................................ 11 12.4 ElectrostaticDischargeCaution............................23 8.1 Overview.................................................................11 12.5 Glossary................................................................23 8.2 FunctionalBlockDiagram.......................................11 13 Mechanical,Packaging,andOrderable 8.3 FeatureDescription.................................................11 Information........................................................... 23 8.4 DeviceFunctionalModes........................................12 5 Revision History ChangesfromRevisionO(March2013)toRevisionP Page • AddedESDRatingstable,FeatureDescriptionsection,DeviceFunctionalModes,ApplicationandImplementation section,PowerSupplyRecommendationssection,Layoutsection,DeviceandDocumentationSupportsection,and Mechanical,Packaging,andOrderableInformationsection.................................................................................................. 1 ChangesfromRevisionN(March2013)toRevisionO Page • ChangedlayoutofNationalDataSheettoTIformat........................................................................................................... 23 2 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 6 Pin Configuration and Functions NHJPackage 14Pins TopView - + V VCM V 3 2 1 +FB 4 14 NC RF -IN 5 13 +OUT RG RG +IN 6 12 -OUT RF -FB 7 11 NC 8 9 10 - + V VEN V PinFunctions PIN I/O DESCRIPTION NAME NO. -FB 7 O Feedbackfrom-OUT +FB 4 O Feedbackfrom+OUT +IN 6 I PositiveInput -IN 5 I NegativeInput NC 11 — NoConnection NC 14 — NoConnection -OUT 12 O NegativeOutput +OUT 13 O PositiveOutput VCM 2 I OutputCommonModeVoltage VEN 9 I Enable V- 3 P NegativeSupply V- 8 P NegativeSupply V+ 1 P PositiveSupply V+ 10 P PositiveSupply Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com 7 Specifications 7.1 Absolute Maximum Ratings (1)(2)(3) MIN MAX UNIT SupplyVoltage(V =V+-V−) 5.5 V S CommonModeInputVoltage V- V+ V MaximumOperatingJunctionTemperature 150 °C MaximumInputCurrent 30 mA MaximumOutputCurrent(pins12,13) (4) mA SolderingInformation 260 °C InfraredorConvection(30sec) StorageTemperature,T −65 150 °C stg (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.RecommendedOperatingConditionsindicate conditionsforwhichthedeviceisintendedtobefunctional,butspecificperformanceisnotensured.Forensuredspecifications,seethe ElectricalCharacteristics:+5Vtables. (2) IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheTexasInstrumentsSalesOffice/Distributorsforavailabilityand specifications. (3) Forsolderingspecifications,seeSNOA549. (4) Themaximumoutputcurrent(I )isdeterminedbydevicepowerdissipationlimitations.SeePowerDissipationformoredetails. OUT 7.2 ESD Ratings VALUE UNIT Human-bodymodel(HBM),perANSI/ESDA/JEDECJS-001(1) ±2000 Charged-devicemodel(CDM),perJEDECspecificationJESD22- ±750 V(ESD) Electrostaticdischarge C101(2) V Machinemodel(MM) ±250 (1) JEDECdocumentJEP155statesthat500-VHBMallowssafemanufacturingwithastandardESDcontrolprocess. (2) JEDECdocumentJEP157statesthat250-VCDMallowssafemanufacturingwithastandardESDcontrolprocess. 7.3 Recommended Operating Conditions See (1) MIN NOM MAX UNIT OperatingTemperatureRange −40 +125 °C TotalSupplyVoltageTemperatureRange 4.7 5.25 V (1) AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.RecommendedOperatingConditionsindicate conditionsforwhichthedeviceisintendedtobefunctional,butspecificperformanceisnotensured.Forensuredspecifications,seethe ElectricalCharacteristics:+5Vtables. 7.4 Thermal Information LMH6554 THERMALMETRIC(1) NHJ UNIT 14PINS R Junction-to-ambientthermalresistance 60 °C/W θJA (1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheICPackageThermalMetricsapplicationreport,SPRA953. 4 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 7.5 Electrical Characteristics: +5 V Unlessotherwisespecified,alllimitsareensuredforT =+25°C,A =+2,V+=+2.5V,V−=−2.5V,R =200Ω,V = A V L CM (V++V-)/2,R =200Ω,forsingle-endedin,differentialout.(1) F PARAMETER TESTCONDITIONS MIN (2) TYP (3) MAX (2) UNIT ACPERFORMANCE(DIFFERENTIAL) A =1,V =0.2V 2800 V OUT PP SSBW SmallSignal−3dBBandwidth (2) A =2,V =0.2V 2500 MHz V OUT PP A =4,V =0.2V 1600 V OUT PP A =1,V =2V 1800 V OUT PP LSBW LargeSignalBandwidth A =2,V =2V 1500 MHz V OUT PP A =2,V =1.5V 1900 V OUT PP 0.1dBBW 0.1dBBandwidth A =2,V =0.2V ,R =250Ω 830 MHz V OUT PP F SR SlewRate 4VStep 6200 V/μs 2VStep,10–90% 290 t/t Rise/FallTime ps r f 0.4VStep,10–90% 150 T 0.1%SettlingTime 2VStep,R =200Ω 4 ns s_0.1 L OverdriveRecoveryTime V =2V,A =5V/V 6 ns IN V DISTORTIONANDNOISERESPONSE V =2V ,f=20MHz -102 OUT PP V =2V ,f=75MHz -96 OUT PP HD2 2ndHarmonicDistortion V =2V ,f=125MHz -87 dBc OUT PP V =2V ,f=250MHz −79 OUT PP V =1.5V ,f=250MHz −81 OUT PP V =2V ,f=20MHz −110 OUT PP V =2V ,f=75MHz −97 OUT PP HD3 3rdHarmonicDistortion V =2V ,f=125MHz −87 dBc OUT PP V =2V ,f=250MHz −70 OUT PP V =1.5V ,f=250MHz −75 OUT PP OIP3 Output3rd-OrderIntercept f=150MHz,V =2V Composite 46.5 dBm OUT PP IMD3 Two-ToneIntermodulation f=150MHz,V =2V Composite −97 dBc OUT PP e InputVoltageNoiseDensity f=10MHz 0.9 nV/√Hz n i InputNoiseCurrent f=10MHz 11 pA/√Hz n+ i InputNoiseCurrent f=10MHz 11 pA/√Hz n- NF NoiseFigure (4) 50ΩSystem,A =7.3,100MHz 7.7 dB V INPUTCHARACTERISTICS I /I −75 −29 20 µA BI+ BI- TCIbi InputBiasCurrentTemperatureDrift 8 µA/°C I InputBiasCurrent (5) VCM=0V,VID=0V, −10 1 10 μA BID I =(I -I )/2 BOFFSET B- B+ InputBiasCurrentDiffOffset TCIbo TemperatureDrift (3) 0.006 µA/°C CMRR CommonModeRejectionRatio DC,V =0V,V =0V 83 dB CM ID (1) ElectricalTablevaluesapplyonlyforfactorytestingconditionsatthetemperatureindicated.Factorytestingconditionsresultinvery limitedself-heatingofthedevicesuchthatT =T .Nospecificationofparametricperformanceisindicatedintheelectricaltablesunder J A conditionsofinternalself-heatingwhereT >T .SeeThermalInformationforinformationontemperaturede-ratingofthisdevice." J A Min/Maxratingsarebasedonproductcharacterizationandsimulation.Individualparametersaretestedasnoted. (2) Limitsare100%productiontestedat25°C.LimitsovertheoperatingtemperaturerangeareensuredthroughcorrelationusingStatistical QualityControl(SQC)methods. (3) Typicalvaluesrepresentthemostlikelyparametricnormasdeterminedatthetimeofcharacterization.Actualtypicalvaluesmayvary overtimeandwillalsodependontheapplicationandconfiguration.Thetypicalvaluesarenottestedandarenotensuredonshipped productionmaterial. (4) Fortestschematic,refertoFigure34. (5) I isreferredtoadifferentialoutputoffsetvoltagebythefollowingrelationship:V =I *2R BI OD(OFFSET) BI F. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com Electrical Characteristics: +5 V (continued) Unlessotherwisespecified,alllimitsareensuredforT =+25°C,A =+2,V+=+2.5V,V−=−2.5V,R =200Ω,V = A V L CM (V++V-)/2,R =200Ω,forsingle-endedin,differentialout.(1) F PARAMETER TESTCONDITIONS MIN (2) TYP (3) MAX (2) UNIT R DifferentialInputResistance Differential 19 Ω IN C DifferentialInputCapacitance Differential 1 pF IN CMVR InputCommonModeVoltageRange CMRR>32dB ±1.25 ±1.3 V OUTPUTPERFORMANCE OutputVoltageSwing (3) Single-EndedOutput ±1.35 ±1.42 V I OutputCurrent (3) V =0V ±120 ±150 mA OUT OUT OneOutputShortedtoGround ISC ShortCircuitCurrent V =2VSingle-Ended (6) 150 mA IN ΔVOUTCommonMode/ΔV OutputBalanceError OUT −64 dB Differential,ΔV =1V,f<1Mhz OD OUTPUTCOMMONMODECONTROLCIRCUIT CommonModeSmallSignal Bandwidth VIN+=VIN−=0V 500 MHz SlewRate VIN+=VIN−=0V 200 V/μs V InputOffsetVoltage CommonMode,V =0,V =0V −16 −6.5 4 mV OSCM ID CM I InputOffsetCurrent (7) 6 18 μA OSCM VoltageRange ±1.18 ±1.25 V CMRR MeasureV ,V =0V 82 dB OD ID InputResistance 180 kΩ Gain ΔV /ΔV 0.99 0.995 1.0 V/V OCM CM MISCELLANEOUSPERFORMANCE Z OpenLoopTransimpedanceGain Differential 180 kΩ T PSRR PowerSupplyRejectionRatio DC,ΔV+=ΔV−=1V 74 95 dB 46 52 57 IS SupplyCurrent (3) RL=∞ Atextreme mA 60 temperatures EnableVoltageThreshold Single5VSupply (8) 2.5 V DisableVoltageThreshold Single5VSupply (8) 2.5 V Enable/DisableTime 15 ns 450 510 570 Enable=0,Single5-V ISD SupplyCurrent,Disabled supply Atextreme 600 μA temperatures (6) Shortcircuitcurrentshouldbelimitedindurationtonomorethan10seconds.SeePowerDissipationformoredetails. (7) Negativeinputcurrentimpliescurrentflowingoutofthedevice. (8) V thresholdistypically+/-0.3Vcenteredaround(V++V-)/2relativetoground. EN 6 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 7.6 Typical Performance Characteristics V = ±2.5 V S (T =25°C,R =200Ω,R =90Ω,R =76.8Ω,R =200Ω,A =+2,forsingleendedin,differentialout,unlessspecified). A F G T L V 2 2 1 RF = 200: 1 AV = 1 V/V 0 0 B) -1 B) -1 N (d -2 RF = 250: N (d -2 AV = 2 V/V AI AI G -3 G -3 ED -4 RF = 300: ED -4 AV = 4 V/V Z Z LI -5 LI -5 MA -6 MA -6 AV = 8 V/V R R O -7 O -7 N N -8 -8 -9 -9 -10 VOD = 0.2 VPP -10 VOD = 0.2 VPP 1 10 100 1000 10000 1 10 1100 1000 10000 FREQUENCY (MHz) FREQUENCY (MHz) Figure1. FrequencyResponsevsR Figure2.FrequencyResponsevsGain F 6 2 RL = 1k: 1 VOD = 0.2 VPP 4 B) 2 RL = 500: B) -01 N (d N (d -2 VOD = 1.6 VPP AI 0 AI G G -3 ED -2 ED -4 LIZ RL = 200: LIZ -5 VOD = 2 VPP A -4 A M M -6 R R O -6 O -7 N N -8 -8 -9 -10 VOD = 0.2 VPP -10 1 10 100 1000 10000 1 10 100 1000 10000 FREQUENCY (MHz) FREQUENCY (MHz) Figure3.FrequencyResponsevsR Figure4.FrequencyResponsevsOutputVoltage(V ) L OD 0.3 1.5 0.2 1.0 0.1 0.5 V) V) (D 0 (D 0 O O V V -0.1 -0.5 -0.2 -1.0 -0.3 -1.5 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 TIME (ns) TIME (ns) Figure5.0.5V PulseResponseSingle-EndedInput Figure6.2V PulseResponseSingle-EndedInput PP PP Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com Typical Performance Characteristics V = ±2.5 V (continued) S (T =25°C,R =200Ω,R =90Ω,R =76.8Ω,R =200Ω,A =+2,forsingleendedin,differentialout,unlessspecified). A F G T L V 2.5 -60 RL = 200: 2.0 -65 VOD = 2 VPP 1.5 -70 VOCM = 0V 1.0 c) -75 B d V(V)OD -00..505 ORTION ( ---889050 HD2 T S -1.0 DI -95 HD3 -1.5 -100 -2.0 -105 -2.5 -110 0 1 2 3 4 5 6 7 8 9 10 25 75 125 175 225 275 300 TIME (ns) FREQUENCY (MHz) Figure7.4V PulseResponseSingle-EndedInput Figure8.DistortionvsFrequencySingle-EndedInput PP -50 -40 RL = 200: RL = 200: -60 Vfc O=D 2=5 2 M VHPzP -50 Vfc O=D 7=5 2 M VHPzP Bc) -70 Bc) -60 N (d HD3 N (d O O TI -80 TI -70 R R HD3 O O T T S -90 S -80 DI DI HD2 HD2 -100 -90 -110 -100 -1.0 -0.5 0 0.5 1.0 -1.0 -0.5 0 0.5 1.0 VOCM (V) VOCM (V) Figure9.DistortionvsOutputCommonModeVoltage Figure10.DistortionvsOutputCommonModeVoltage -20 -80 RL = 200: -30 VOD = 2 VPP fc = 150 MHz -85 -40 150 MHz c) B N (d -50 Bc) -90 TIO -60 3 (d R HD3 D STO -70 IM -95 75 MHz DI -80 HD2 -100 -90 -100 -105 -1.0 -0.5 0 0.5 1.0 0.8 1.0 1.2 1.4 1.6 1.8 2 VOCM (V) DIFFERENTIAL VOUT (VPP_EACH_TONE) Figure11.DistortionvsOutputCommonModeVoltage Figure12.3rdOrderIntermodulationProductsvsV OUT 8 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 Typical Performance Characteristics V = ±2.5 V (continued) S (T =25°C,R =200Ω,R =90Ω,R =76.8Ω,R =200Ω,A =+2,forsingleendedin,differentialout,unlessspecified). A F G T L V 55 55 150 MHz 75 MHz 50 50 45 45 40 m) m) B 40 B 35 d d P3 ( 35 250 MHz P3 ( 30 OI OI 25 30 450 MHz 20 25 15 20 10 -4 -3 -2 -1 0 1 2 3 4 50 100 150 200 250 300 350 400 450 500 DIFFERENTIAL OUTPUT POWER POD (dBm/tone) CENTER FREQUENCY (MHz) Figure13.OIP3vsOutputPowerP Figure14.OIP3vsCenterFrequency OUT 8.0 1.6 1.4 7.8 RE (dB) 7.6 (V)OUT 11..20 U V G M 0.8 FI U SE 7.4 XIM 0.6 NOI Av= 7.3 V/V MA 0.4 7.2 Rs= 50(cid:13) Single Ended Input 0.2 7.0 VIN = 1.7V SINGLE-ENDED INPUT 0 0 100 200 300 400 500 0 -20 -40 -60 -80 -100 FREQUENCY (MHz) OUTPUT CURRENT (mA) Figure15.NoiseFigurevsFrequency Figure16.MaximumV vsI OUT OUT 0 3 1.2 VIN = 1.7V SINGLE-ENDED INPUT INPUT -0.2 2 0.8 (V)UT --00..46 GE (V)OD 1 0.4 GE (V) O A OUTPUT A V T T M -0.8 OL 0 0 OL U V V MINIM -1.0 TPUT -1 -0.4 NPUT -1.2 U I O -2 -0.8 -1.4 -1.6 -3 -1.2 0 20 40 60 80 100 0 200 400 600 800 1000 OUTPUT CURRENT (mA) TIME (ns) Figure17.MinimumV vsI Figure18.OverdriveRecovery OUT OUT Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com Typical Performance Characteristics V = ±2.5 V (continued) S (T =25°C,R =200Ω,R =90Ω,R =76.8Ω,R =200Ω,A =+2,forsingleendedin,differentialout,unlessspecified). A F G T L V 90 90 85 85 L) 80 +PSRR 80 A NTI 75 75 E DIFFER 7605 -PSRR RR (dB) 7605 Bc 60 CM 60 d R ( 55 55 R PS 50 50 45 45 VIN = 0V VIN = 0V VOD = 1VPP 40 40 1 10 100 1000 1 10 100 1000 FREQUENCY (MHz) FREQUENCY (MHz) Figure19.PSRR Figure20.CMRR -30 120 0 AV = 1 V/V -35 100 -30 c) B -40 CE ERROR (d --4550 (cid:13)|Z| (dB.) 6800 --9600 PHASE (°) N 40 -120 A L -55 A B 20 -150 -60 Gain Phase 0 -180 -65 1 10 100 1000 100k 1M 10M 100M 1G 10G FREQUENCY (MHz) FREQUECNY (Hz) Figure21.BalanceError Figure22.OpenLoopTransimpedance 1k 10 0 100 --1200 S11 S21 S22 B) d -30 (cid:13)) DE ( -40 |Z| (10 AGNITU --5600 (SINGLE-ENSD11ED INPUT) M 1 -70 S12 -80 -90 100m AV = 1 V/V -100 1 10 100 1k 1 10 100 1000 3000 FREQUENCY (MHz) FREQUENCY (MHz) Figure23.Closed-LoopOutputImpedance Figure24.DifferentialS-ParameterMagnitudevsFrequency 10 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 8 Detailed Description 8.1 Overview The LMH6554 is a fully differential, current feedback amplifier with integrated output common mode control, designed to provide low distortion amplification to wide bandwidth differential signals. The common mode feedback circuit sets the output common mode voltage independent of the input common mode, as well as forcing the V+ and V− outputs to be equal in magnitude and opposite in phase, even when only one of the inputs isdrivenasinsingletodifferentialconversion. The proprietary current feedback architecture of the LMH6554 offers gain and bandwidth independence with exceptional gain flatness and noise performance, even at high values of gain, simply with the appropriate choice of RF1 and RF2. Generally RF1 is set equal to RF2, and RG1 equal to RG2, so that the gain is set by the ratio RF/RG.MatchingoftheseresistorsgreatlyaffectsCMRR,DCoffseterror,andoutputbalance. 8.2 Functional Block Diagram V+ +FB +OUT -IN ± 2.5 k(cid:13) High-Aol + Differential I/O Amplifier ± 2.5 k(cid:13) +IN + -OUT -FB V+ ± Vcm Error Amplifier High + VCM Impedance VEN Buffer V± 8.3 Feature Description The proprietary current feedback architecture of the LMH6554 offers gain and bandwidth independence with exceptional gain flatness and noise performance, even at high values of gain, simply with the appropriate choice of RF1 and RF2. Generally RF1 is set equal to RF2, and RG1 equal to RG2, so that the gain is set by the ratio RF/RG. Matching of these resistors greatly affects CMRR, DC offset error, and output balance. A maximum of 0.1% tolerance resistors are recommended for optimal performance, and the amplifier is internally compensated to operate with optimum gain flatness with RF value of 200 Ω depending on PCB layout, and load resistance. The output common mode voltage is set by the VCM pin with a fixed gain of 1 V/V. This pin should be driven by a low impedance reference and should be bypassed to ground with a 0.1-μF ceramic capacitor. Any unwanted signal coupling into the VCM pin will be passed along to the outputs, reducing the performance of the amplifier. The LMH6554 can be configured to operate on a single 5V supply connected to V+ with V- grounded or configured for a split supply operation with V+ = +2.5 V and V− = −2.5 V. Operation on a single 5-V supply, dependingongain,islimitedbytheinputcommonmoderange;therefore,ACcouplingmayberequired. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com 8.4 Device Functional Modes This wideband FDA requires external resistors for correct signal-path operation. When configured for the desired input impedance and gain setting with these external resistors, the amplifier can be either on with the PD pin asserted to a voltage greater than Vs– + 1.7 V, or turned off by asserting PD low. Disabling the amplifier shuts off the quiescent current and stops correct amplifier operation. The signal path is still present for the source signal through the external resistors. The Vocm control pin sets the output average voltage. Left open, Vocm defaults to an internal midsupply value. Driving this high-impedance input with a voltage reference within its valid rangesetsatargetfortheinternalVcmerroramplifier. 12 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validateandtesttheirdesignimplementationtoconfirmsystemfunctionality. 9.1 Application Information The LMH6554 is a fully differential, current feedback amplifier with integrated output common mode control, designed to provide low distortion amplification to wide bandwidth differential signals. The common mode feedback circuit sets the output common mode voltage independent of the input common mode, as well as forcing the V+ and V− outputs to be equal in magnitude and opposite in phase, even when only one of the inputs isdrivenasinsingletodifferentialconversion. The proprietary current feedback architecture of the LMH6554 offers gain and bandwidth independence with exceptional gain flatness and noise performance, even at high values of gain, simply with the appropriate choice ofR andR .GenerallyR issetequaltoR ,andR equaltoR ,sothatthegainissetbytheratioR /R . F1 F2 F1 F2 G1 G2 F G Matching of these resistors greatly affects CMRR, DC offset error, and output balance. A maximum of 0.1% tolerance resistors are recommended for optimal performance, and the amplifier is internally compensated to operatewithoptimumgainflatnesswithR valueof200Ω dependingonPCBlayout,andloadresistance. F The output common mode voltage is set by the V pin with a fixed gain of 1 V/V. This pin should be driven by a CM low impedance reference and should be bypassed to ground with a 0.1-µF ceramic capacitor. Any unwanted signalcouplingintotheV pinwillbepassedalongtotheoutputs,reducingtheperformanceoftheamplifier. CM The LMH6554 can be configured to operate on a single 5-V supply connected to V+ with V- grounded or configured for a split supply operation with V+ = +2.5 V and V− = −2.5 V. Operation on a single 5-V supply, depending on gain, is limited by the input common mode range; therefore, AC coupling may be required. Split supplieswillallowmuchlessrestrictedACandDCcoupledoperationwithoptimumdistortionperformance. 9.2 Typical Applications 9.2.1 Single-EndedInputtoDifferentialOutputOperation RS = 50: 91: 200: VSa C V+ 76.8: ACS-Couorucpeled 0.1 PF + - 50: ADC VCM LMH6554 Up To 16-Bit Data Converter - + 91: 50: 30: V- VCMO 0.1 PF 0.1 PF 200: VEN Figure25. Single-EndedInputtoDifferentialOutputSchematic 9.2.1.1 DesignRequirements One typical application for the LMH6554 is to drive an ADC as shown in Figure 25. The following design is a single-ended to differential circuit with an input impedance of 50 Ω and an output impedance of 100 Ω. The VCM voltage of the amplifier needs to be set to the same voltage as the ADC reference voltage, which is typically 1.2 V. Figure 27 shows the design equations required to set the external resistor values. This design also requires a gainof2and-96dBcTHDat75MHz. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com Typical Applications (continued) 9.2.1.2 DetailedDesignProcedure To match the input impedance of the circuit in Figure 27 to a specified source resistance, RS, requries that RT || RIN = RS. The equations governing RIN and AV for single-to-differential operation are also provided in Figure 27. These equations, along with the source matching condition, must be solved iteratively to achieve the desired gain with the proper input termination. Component values for several common gain configuration in a 50 ΩenvironmentaregiveninTable1. 9.2.1.2.1 Enable/DisableOperation The LMH6554 is equipped with an enable pin (V ) to reduce power consumption when not in use. The V pin, EN EN when not driven, floats high (on). When the V pin is pulled low, the amplifier is disabled and the amplifier EN output stage goes into a high impedance state so the feedback and gain set resistors determine the output impedance of the circuit. For this reason input to output isolation will be poor in the disabled state and the part is notrecommendedinmultiplexedapplicationswhereoutputsarealltiedtogether. With a 5V difference between V+ and V-, the V threshold is ½ way between the supplies (e.g. 2.5V with 5V EN single supply) as shown in Figure 26. R2 ensures active (enable) mode with V floating, and R1 provides input EN currentlimiting.V alsohasESDdiodestoeithersupply. EN V+ R LMH6554 R202k ciont Supply Bias ote Mid-Point Circuitry Pr R1 D 10k S Q2 Q1 E VEN R I Tail V- Figure26. EnableBlockDiagram 9.2.1.2.2 Single-EndedInputtoDifferentialOutputOperation In many applications, it is required to drive a differential input ADC from a single ended source. Traditionally, transformers have been used to provide single to differential conversion, but these are inherently bandpass by nature and cannot be used for DC coupled applications. The LMH6554 provides excellent performance as a single-endedinputtodifferentialoutputconverterdowntoDC.Figure27 showsatypicalapplicationcircuitwhere anLMH6554isusedtoproduceabalanceddifferentialoutputsignalfromasingleendedsource. 14 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 Typical Applications (continued) RF AV, RIN + V RS RG RO + - IN- VSa RT VCM LMH6554 VO ADC + IN+ - RG RO RM + V- - RF AV = ¨¨©§2E(11 +- EE21)¨¨©§ E1 = ¨¨©§RGR +G RF¨¨©§ RIN=¨¨©§2RG +1 R+ ME 2(1-E2)¨¨©§ E2 = ¨¨©§RGR +G R +F R +M RM¨¨©§ RRSM==RRTT |||| RRISN Figure27. Single-EndedInputwithDifferentialOutput When using the LMH6554 in single-to-differential mode, the complimentary output is forced to a phase inverted replica of the driven output by the common mode feedback circuit as opposed to being driven by its own complimentary input. Consequently, as the driven input changes, the common mode feedback action results in a varying common mode voltage at the amplifier's inputs, proportional to the driving signal. Due to the non-ideal commonmoderejectionoftheamplifier'sinputstage,asmallcommonmodesignalappearsattheoutputswhich is superimposed on the differential output signal. The ratio of the change in output common mode voltage to output differential voltage is commonly referred to as output balance error. The output balance error response of theLMH6554overfrequencyisshownintheTypicalPerformanceCharacteristicsV =±2.5V. S To match the input impedance of the circuit in Figure 27 to a specified source resistance, R , requries that R || S T R = R . The equations governing R and A for single-to-differential operation are also provide in Figure 27. IN S IN V Theseequations,alongwiththesourcematchingcondition,mustbesolvediterativelytoachievethedesiredgain with the proper input termination. Component values for several common gain configuration in a 50Ω environmentaregiveninTable1. Table1. GainComponentValuesfor50 Ω System GAIN R R R R F G T M 0dB 200Ω 191Ω 62Ω 27.7Ω 6dB 200Ω 91Ω 76.8Ω 30.3Ω 12dB 200Ω 35.7Ω 147Ω 37.3Ω 9.2.1.2.3 DrivingCapacitiveLoads As noted previously, capacitive loads should be isolated from the amplifier output with small valued resistors. This is particularly the case when the load has a resistive component that is 500 Ω or higher. A typical ADC has capacitive components of around 10 pF and the resistive component could be 1000 Ω or higher. If driving a transmission line, such as 50-Ω coaxial or 100-Ω twisted pair, using matching resistors will be sufficient to isolate any subsequent capacitance. For other applications, see Figure 29 in Typical Performance Characteristics V = S ±2.5V. 9.2.1.3 ApplicationCurves Many application circuits will have capacitive loading. As shown in Figure 28, amplifier bandwidth is reduced with increasingcapacitiveload,soparasiticcapacitanceshouldbestrictlylimited. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com In order to ensure stability resistance should be added between the capacitive load and the amplifier output pins. The value of the resistor is dependent on the amount of capacitive load as shown in Figure 29. This resistive value is a suggestion. System testing will be required to determine the optimal value. Using a smaller resistor will retain more system bandwidth at the expense of overshoot and ringing, while larger values of resistance will reduceovershootbutwillalsoreducesystembandwidth. 3 70 2 LOAD = 1k: || CAP LOAD 1 CL=2.2 pF, RO=38: 60 B) 0 D GAIN (d ---123 CL=6.8 pF, RO=22: :ED R ()O 5400 ALIZE --45 CL=18 pF, RO=14: GEST 30 ORM -6 CL=68 pF, RO=5: SUG 20 N -7 -8 10 -9 VOD = 200 mVPP -10 0 1 10 100 1000 10000 5 10 15 20 25 30 35 40 FREQUENCY (MHz) CAPACITIVE LOAD (pF) Figure28.FrequencyResponsevsCapacitiveLoad Figure29.SuggestedR vsCapacitiveLoad OUT 9.2.2 FullyDifferentialOperation The LMH6554 will perform best in a fully differential configuration. The circuit shown in Figure 30 is a typical fully differential application circuit as might be used to drive an analog to digital converter (ADC). In this circuit the closed loop gain is A = V / V = R / R , where the feedback is symmetric. The series output resistors, R , V OUT IN F G O are optional and help keep the amplifier stable when presented with a capacitive load. Refer to the Driving CapacitiveLoadssectionfordetails. Hereistheexpressionfortheinputimpedance,R ,asdefinedinFigure30: IN R =2R IN G When driven from a differential source, the LMH6554 provides low distortion, excellent balance, and common mode rejection. This is true provided the resistors R , R and R are well matched and strict symmetry is F G O observed in board layout. With an intrinsic device CMRR of greater than 70 dB, using 0.1% resistors will give a worstcaseCMRRofaround50dBformostcircuits. The circuit configuration shown in Figure 30 was used to measure differential S-parameters in a 100Ω environment at a gain of 1 V/V. Refer to Figure 24 in Typical Performance Characteristics V = ±2.5 V for S measurementresults. 200: R F 50: RS 67: 50: 200: + VSa V+IN RIN RG VCM LMH6554 VO-UT RL=100: - + R G - RS 200: 50: 67: VEN 50: R F 200: Figure30. DifferentialS-ParameterTestCircuit 16 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 9.2.3 SingleSupplyOperation Single 5V supply operation is possible: however, as discussed earlier, AC input coupling is recommended due to input common mode limitations. An example of an AC coupled, single supply, single-to-differential circuit is shown in Figure 31. Note that when AC coupling, both inputs need to be AC coupled irrespective of single-to- differential or differential-differential configuration. For higher supply voltages DC coupling of the inputs may be possible provided that the output common mode DC level is set high enough so that the amplifier's inputs and outputsarewithintheirspecifiedoperationranges. RF RO RS 0.1 PF RG + VSa RT VCM LMH6554 CL RL VO - RG RM 0.1 PF RO RF VEN Figure31. ACCoupledforSingleSupplyOperation For optimum performance, split supply operation is recommended using +2.5-V and −2.5-V supplies; however, operation is possible on split supplies as low as +2.35 V and −2.35 V and as high as +2.65 V and −2.65 V. Provided the total supply voltage does not exceed the 4.7-V to 5.3-V operating specification, non-symmetric supply operation is also possible and in some cases advantageous. For example, if a 5-V DC coupled operation is required for low power dissipation but the amplifier input common mode range prevents this operation, it is still possible with split supplies of (V+) and (V-). Where (V+)-(V-) = 5 V and V+ and V- are selected to center the amplifierinputcommonmoderangetosuittheapplication. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com 9.2.4 DrivingAnalog-to-DigitalConverters Analog-to-digital converters present challenging load conditions. They typically have high impedance inputs with large and often variable capacitive components. Figure 32 shows the LMH6554 driving an ultra-high-speed Gigasample ADC the ADC10D1500. The LMH6554 common mode voltage is set by the ADC10D1500. The circuit in Figure 32 has a 2nd order bandpass LC filter across the differential inputs of the ADC10D1500. The ADC10D1500 is a dual channel 10–bit ADC with maximum sampling rate of 3 GSPS when operating in a single channelmodeand1.5GSPSindualchannelmode. RS = 50: 91: 200: VSa C V+ 76.8: AC-Coupled 50: ADC Source 0.1 PF + - VCM LMH6554 Up To 16-Bit Data Converter + - 91: 50: 30: V- VCMO 0.1 PF 0.1 PF 200: VEN Figure32. Drivinga10-bitGigasampleADC Figure 33 shows the SFDR and SNR performance vs. frequency for the LMH6554 and ADC10D1500 combination circuit with the ADC input signal level at −1dBFS. In order to properly match the input impedance seen at the LMH6554 amplifier inputs, R is chosen to match Z || R for proper input balance. The amplifier is M S T configured to provide a gain of 2 V/V in single to differential mode. An external bandpass filter is inserted in series between the input signal source and the amplifier to reduce harmonics and noise from the signal generator. 90 85 80 75 SFDR (dBm) 70 B) 65 d ( 60 55 50 SNR (dBFs) 45 40 0 100 200 300 400 500 600 700 750 INPUT FREQUENCY (MHz) Figure33. LMH6554/ADC10D1500SFDRandSNRPerformancevs.Frequency The amplifier and ADC should be located as close together as possible. Both devices require that the filter components be in close proximity to them. The amplifier needs to have minimal parasitic loading on it's outputs and the ADC is sensitive to high frequency noise that may couple in on its inputs. Some high performance ADCs have an input stage that has a bandwidth of several times its sample rate. The sampling process results in all inputsignalspresentedtotheinputstagemixingdownintothefirstNyquistzone(DCtoFs/2). 18 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 9.2.5 OutputNoisePerformanceandMeasurement Unlike differential amplifiers based on voltage feedback architectures, noise sources internal to the LMH6554 refer to the inputs largely as current sources, hence the low input referred voltage noise and relatively higher input referred current noise. The output noise is therefore more strongly coupled to the value of the feedback resistor and not to the closed loop gain, as would be the case with a voltage feedback differential amplifier. This allows operation of the LMH6554 at much higher gain without incurring a substantial noise performance penalty, simplybychoosingasuitablefeedbackresistor. Figure 34 shows a circuit configuration used to measure noise figure for the LMH6554 in a 50-Ω system. A feedback resistor value of 200Ω is chosen for the UQFN package to minimize output noise while simultaneously allowing both high gain (7 V/V) and proper 50-Ω input termination. Refer to Single-Ended Input to Differential OutputOperation forthecalculationofresistorandgainvalues. 200: + V RS = 50: 8: 1 PF 2:1 (TURNS) + - VS a VCM LMH6554 VO 50: + - 8: 1 PF 50: - V 200: AV = 7 V/V Figure34. NoiseFigureCircuitConfiguration 9.2.6 BalancedCableDriver With up to 5.68 V differential output voltage swing the LMH6554 can be configured as a cable driver. The PP LMH6554isalsosuitablefordrivingdifferentialcablesfromasingleendedsourceasshowninFigure35. 200: 50: RS = 50: 91: VS + 2 VPP a 76.8: VCM LMH6554 Input - Source 91: VEN 50: 30.3: 100: 200: TWISTED PAIR Figure35. FullyDifferentialCableDriver Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com 10 Power Supply Recommendations The LMH6554 can be used with any combination of positive and negative power supplies as long as the combined supply voltage is between 4.7 V and 5.25 V. The LMH6554 will provide best performance when the outputvoltageissetatthemidsupplyvoltage,andwhenthetotalsupplyvoltageissetto5V. Power supply bypassing as shown in Power Supply Bypassing is important and power supply regulation should bewithin5%orbetter. 10.1 Power Supply Bypassing The LMH6554 requires supply bypassing capacitors as shown in Figure 36 and Figure 37. The 0.01-μF and 0.1- μF capacitors should be leadless SMT ceramic capacitors and should be no more than 3 mm from the supply pins. These capacitors should be star routed with a dedicated ground return plane or trace for best harmonic distortion performance. Thin traces or small vias will reduce the effectiveness of bypass capacitors. Also shown in both figures is a capacitor from the VCM and V pins to ground. These inputs are high impedance and can EN provide a coupling path into the amplifier for external noise sources, possibly resulting in loss of dynamic range, degradedCMRR,degradedbalanceandhigherdistortion. + V 0.1 PF 0.01 PF 10 PF VCM +IN + -OUT LMH6554 -IN - +OUT 0.1 PF VEN 0.1 PF - V 0.1 PF 0.01 PF 10 PF Figure36. SplitSupplyBypassingCapacitors + V 0.1 PF 0.01 PF 10 PF +IN + -OUT VCM LMH6554 +OUT -IN - 0.1 PF VEN 0.01 PF Figure37. SingleSupplyBypassingCapacitors 20 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 11 Layout 11.1 Layout Guidelines The LMH6554 is a high speed, high performance amplifier. In order to get maximum benefit from the differential circuit architecture board layout and component selection is very critical. The circuit board should have a low inductance ground plane and well bypassed broad supply lines. External components should be leadless surface mount types. The feedback network and output matching resistors should be composed of short traces and precision resistors (0.1%). The output matching resistors should be placed within 3 or 4 mm of the amplifier as should the supply bypass capacitors. Refer to Power Supply Bypassing for recommendations on bypass circuit layout.Evaluationboardsareavailablethroughtheproductfolderonti.com. By design, the LMH6554 is relatively insensitive to parasitic capacitance at its inputs. Nonetheless, ground and power plane metal should be removed from beneath the amplifier and from beneath R and R for best F G performanceathighfrequency. Withanydifferentialsignalpath,symmetryisveryimportant.Evensmallamountsofasymmetrycancontributeto distortionandbalanceerrors. 11.2 Layout Example Figure38. LayoutSchematic Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 21 ProductFolderLinks:LMH6554

LMH6554 SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 www.ti.com 11.3 Power Dissipation The LMH6554 is optimized for maximum speed and performance in a small form factor 14 lead UQFN package. To ensure maximum output drive and highest performance, thermal shutdown is not provided. Therefore, it is of utmostimportancetomakesurethattheT isneverexceededduetotheoverallpowerdissipation. JMAX FollowthesestepstodeterminethemaximumpowerdissipationfortheLMH6554: 1. Calculatethequiescent(no-load)power: P =I *(V ) AMP CC S where • V =V+−V-.(BesuretoincludeanycurrentthroughthefeedbacknetworkifV isnotmid-rail) (1) S CM 2. CalculatetheRMSpowerdissipatedineachoftheoutputstages: P (rms)=rms((V −V+ )*I+ )+rms((V −V- )*I- ) D S OUT OUT S OUT OUT where • V andI arethevoltage OUT OUT • thecurrentmeasuredattheoutputpinsofthedifferentialamplifierasiftheyweresingleendedamplifiers • V isthetotalsupplyvoltage (2) S 3. CalculatethetotalRMSpower: P =P +P (3) T AMP D The maximum power that the LMH6554 package can dissipate at a given temperature can be derived with the followingequation: P =(150°−T )/θ MAX AMB JA where • T =Ambienttemperature(°C) AMB • θ =Thermalresistance,fromjunctiontoambient,foragivenpackage(°C/W) JA • Forthe14leadUQFNpackage,θ is60°C/W (4) JA NOTE If V is not 0V then there will be quiescent current flowing in the feedback network. This CM current should be included in the thermal calculations and added into the quiescent power dissipationoftheamplifier. 11.4 ESD Protection The LMH6554 is protected against electrostatic discharge (ESD) on all pins. The LMH6554 can survive 2000 V Human Body model and 250 V Machine model events. Under normal operation the ESD diodes have no affect on circuit performance. There are occasions, however, when the ESD diodes will be evident. If the LMH6554 is driven by a large signal while the device is powered down the ESD diodes will conduct. The current that flows throughtheESDdiodeswilleitherexitthechipthroughthesupplypinsorwillflowthroughthedevice,henceitis possible to power up a chip with a large signal applied to the input pins. Using the shutdown mode is one way to conservepowerandstillpreventunexpectedoperation. 22 SubmitDocumentationFeedback Copyright©2008–2015,TexasInstrumentsIncorporated ProductFolderLinks:LMH6554

LMH6554 www.ti.com SNOSB30P–OCTOBER2008–REVISEDJANUARY2015 12 Device and Documentation Support 12.1 Device Support 12.1.1 Third-PartyProductsDisclaimer TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONEORINCOMBINATIONWITHANYTIPRODUCTORSERVICE. 12.2 Documentation Support 12.2.1 RelatedDocumentation SeeLMH6554ProductFolderforevaluationboardavailabilityandorderinginformation. 12.3 Trademarks Alltrademarksarethepropertyoftheirrespectiveowners. 12.4 Electrostatic Discharge Caution Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. 12.5 Glossary SLYZ022—TIGlossary. Thisglossarylistsandexplainsterms,acronyms,anddefinitions. 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of thisdocument.Forbrowser-basedversionsofthisdatasheet,refertotheleft-handnavigation. Copyright©2008–2015,TexasInstrumentsIncorporated SubmitDocumentationFeedback 23 ProductFolderLinks:LMH6554

PACKAGE OPTION ADDENDUM www.ti.com 7-Nov-2014 PACKAGING INFORMATION Orderable Device Status Package Type Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Op Temp (°C) Device Marking Samples (1) Drawing Qty (2) (6) (3) (4/5) LMH6554LE/NOPB ACTIVE UQFN NHJ 14 1000 Green (RoHS CU SN Level-3-260C-168 HR -40 to 125 AJA & no Sb/Br) LMH6554LEE/NOPB ACTIVE UQFN NHJ 14 250 Green (RoHS CU SN Level-3-260C-168 HR -40 to 125 AJA & no Sb/Br) LMH6554LEX/NOPB ACTIVE UQFN NHJ 14 4500 Green (RoHS CU SN Level-3-260C-168 HR -40 to 125 AJA & no Sb/Br) (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 7-Nov-2014 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2

PACKAGE MATERIALS INFORMATION www.ti.com 20-Sep-2016 TAPE AND REEL INFORMATION *Alldimensionsarenominal Device Package Package Pins SPQ Reel Reel A0 B0 K0 P1 W Pin1 Type Drawing Diameter Width (mm) (mm) (mm) (mm) (mm) Quadrant (mm) W1(mm) LMH6554LE/NOPB UQFN NHJ 14 1000 178.0 12.4 2.8 2.8 1.0 8.0 12.0 Q1 LMH6554LEE/NOPB UQFN NHJ 14 250 178.0 12.4 2.8 2.8 1.0 8.0 12.0 Q1 LMH6554LEX/NOPB UQFN NHJ 14 4500 330.0 12.4 2.8 2.8 1.0 8.0 12.0 Q1 PackMaterials-Page1

PACKAGE MATERIALS INFORMATION www.ti.com 20-Sep-2016 *Alldimensionsarenominal Device PackageType PackageDrawing Pins SPQ Length(mm) Width(mm) Height(mm) LMH6554LE/NOPB UQFN NHJ 14 1000 210.0 185.0 35.0 LMH6554LEE/NOPB UQFN NHJ 14 250 210.0 185.0 35.0 LMH6554LEX/NOPB UQFN NHJ 14 4500 367.0 367.0 35.0 PackMaterials-Page2

MECHANICAL DATA NHJ0014A LEE14A (Rev B) www.ti.com

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