Product Sample & Technical Tools & Support & Folder Buy Documents Software Community LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 LM7121 235-MHz Tiny Low Power Voltage Feedback Amplifier 1 Features 3 Description • (TypicalUnlessOtherwiseNoted).V =±15V The LM7121 is a high performance operational 1 S amplifier which addresses the increasing AC • EasytouseVoltageFeedbackTopology performance needs of video and imaging • StablewithUnlimitedCapacitiveLoads applications, and the size and power constraints of • TinySOT23-5Package—TypicalCircuitLayout portableapplications. TakesHalftheSpaceOfSO-8Designs The LM7121 can operate over a wide dynamic range • UnityGainFrequency:175MHz of supply voltages, from 5 V (single supply) up to ±15V (see Application and Implementation for more • Bandwidth(−3dB,A =+1,R =100Ω):235MHz V L details). It offers an excellent speed-power product • SlewRate:1300V/μs delivering1300V/μsand235MHzBandwidth(−3dB, • SupplyVoltages: A = +1). Another key feature of this operational V – SO-8:5Vto ±15V amplifier is stability while driving unlimited capacitive loads. – SOT23-5:5Vto ±5V • Characterizedfor:+5V, ±5V, ±15V Due to its tiny SOT23-5 package, the LM7121 is ideal for designs where space and weight are the critical • LowSupplyCurrent:5.3mA parameters. The benefits of the tiny package are evident in small portable electronic devices, such as 2 Applications cameras, and PC video cards. Tiny amplifiers are so • Scanners,ColorFax,DigitalCopiers small that they can be placed anywhere on a board close to the signal source or near the input to an A/D • PCVideoCards converter. • CableDrivers • DigitalCameras DeviceInformation(1) • ADC/DACBuffers PARTNUMBER PACKAGE BODYSIZE(NOM) • Set-topBoxes SOT-23(5) 2.921mm×1.651mm LM7121 SOIC(8) 4.902mm×3.912mm (1) For all available packages, see the orderable addendum at theendofthedatasheet. TypicalCircuitforA =+1Operation UnityGainFrequencyvs.SupplyVoltage V (V =6V) S 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Table of Contents 1 Features.................................................................. 1 6.8 ±5VACElectricalCharacteristics.............................7 2 Applications........................................................... 1 6.9 +5VDCElectricalCharacteristics.............................8 3 Description............................................................. 1 6.10 +5VACElectricalCharacteristics...........................8 6.11 TypicalCharacteristics............................................9 4 RevisionHistory..................................................... 2 7 ApplicationandImplementation........................ 21 5 PinConfigurationandFunctions......................... 3 7.1 ApplicationInformation............................................21 6 Specifications......................................................... 4 7.2 TypicalApplications................................................22 6.1 AbsoluteMaximumRatings......................................4 8 DeviceandDocumentationSupport.................. 26 6.2 HandlingRatings.......................................................4 8.1 Trademarks.............................................................26 6.3 RecommendedOperatingConditions.......................4 8.2 ElectrostaticDischargeCaution..............................26 6.4 ThermalInformation..................................................4 8.3 Glossary..................................................................26 6.5 ±15VDCElectricalCharacteristics...........................5 9 Mechanical,Packaging,andOrderable 6.6 ±15VACElectricalCharacteristics...........................6 Information........................................................... 26 6.7 ±5VDCElectricalCharacteristics.............................6 4 Revision History NOTE:Pagenumbersforpreviousrevisionsmaydifferfrompagenumbersinthecurrentversion. ChangesfromOriginal(August1999)toRevisionA Page • Added,updated,orrenamedthefollowingsections:DeviceInformationTable,PinConfigurationandFunctions, ApplicationandImplementation;PowerSupplyRecommendations;Layout;DeviceandDocumentationSupport; Mechanical,Packaging,andOrderingInformation................................................................................................................. 1 • DeletedT =25°CfromElectricalCharacteristicstables....................................................................................................... 5 J 2 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 5 Pin Configuration and Functions PackageDBV PackageD0008A 5-Pin 8-Pin TopView TopView PinFunctions PIN NUMBER I/O DESCRIPTION NAME DBV D0008A -IN 4 2 I Invertinginput +IN 3 3 I Non-invertinginput N/C –– 5,8 –– Noconnection OUTPUT 1 6 O Output V- 2 4 I Negativesupply V+ 5 7 I Positivesupply Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 3 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com 6 Specifications 6.1 Absolute Maximum Ratings(1) overoperatingfree-airtemperaturerange(unlessotherwisenoted) (1) MIN MAX UNIT DifferentialInputVoltage (2) ±2 V VoltageatInput/OutputPins (V+)−1.4, V (V−)+1.4 SupplyVoltage(V+–V−) 36 V OutputShortCircuittoGround (3) Continuous LeadTemperature(soldering,10sec) 260 °C JunctionTemperature(4) 150 ˚C (1) StressesbeyondthoselistedunderAbsoluteMaximumRatingsmaycausepermanentdamagetothedevice.Thesearestressratings only,whichdonotimplyfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderRecommended OperatingConditions.Exposuretoabsolute-maximum-ratedconditionsforextendedperiodsmayaffectdevicereliability. (2) Appliestobothsingle-supplyandsplit-supplyoperation.Continuousshortcircuitoperationatelevatedambienttemperaturecanresultin exceedingthemaximumallowedjunctiontemperatureof150°C. (3) ThemaximumpowerdissipationisafunctionofT ,R ,andT .Themaximumallowablepowerdissipationatanyambient J(max) θJA A temperatureisP =(T –T )/R .AllnumbersapplyforpackagessoldereddirectlyintoaPCboard. D J(max) A θJA (4) TypicalValuesrepresentthemostlikelyparametricnorm. 6.2 Handling Ratings MIN MAX UNIT T Storagetemperaturerange −65 +150 °C stg Humanbodymodel(HBM),perANSI/ESDA/JEDECJS-001,all 2000 V(ESD) Electrostaticdischarge pins(1) V (1) JEDECdocumentJEP155statesthat2000-VHBMallowssafemanufacturingwithastandardESDcontrolprocess.Humanbody model,1.5kinserieswith100pF. 6.3 Recommended Operating Conditions overoperatingfree-airtemperaturerange(unlessotherwisenoted) MIN NOM MAX UNIT OperatingTemperatureRange -40 85 °C 6.4 Thermal Information THERMALMETRIC(1) D0008A(8) DBV(5) UNIT R Junction-to-ambientthermalresistance 165 325 °C/W θJA (1) Formoreinformationabouttraditionalandnewthermalmetrics,seetheICPackageThermalMetricsapplicationreport,SPRA953. 4 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 6.5 ±15V DC Electrical Characteristics Unlessotherwisespecified,alllimitsensuredforV+=+15V,V−=−15V,V =V =0VandR >1MΩ.Boldfacelimitsapply CM O L atthetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LLMIM71IT2(12I) UNIT 8 mV V InputOffsetVoltage 0.9 OS 15 max 9.5 µA I InputBiasCurrent 5.2 B 12 max 4.3 µA I InputOffsetCurrent 0.04 OS 7 max CommonMode 10 MΩ R InputResistance IN DifferentialMode 3.4 MΩ C InputCapacitance CommonMode 2.3 pF IN 73 dB CMRR CommonModeRejectionRatio −10V≤V ≤10V 93 CM 70 min +PSRR PositivePowerSupplyRejectionRatio 10V≤V+≤15V 86 70 dB 68 min −PSRR NegativePowerSupplyRejectionRatio −15V≤V−≤−10V 81 68 dB 65 min 13 11 Vmin V InputCommon-ModeVoltageRange CMRR≥70dB CM −13 −11 Vmax 65 dB A LargeSignalVoltageGain R =2kΩ,V =20V 72 V L O PP 57 min 11.1 V 13.4 10.8 min R =2kΩ L −11.2 V −13.4 −11.0 max V OutputSwing O 7.75 V 10.2 7.0 min R =150Ω L −5.0 V −7.0 −4.8 max 54 mA Sourcing 71 44 min I OutputShortCircuitCurrent SC 39 mA Sinking 52 34 min 6.6 mA I SupplyCurrent 5.3 S 7.5 max (1) TypicalValuesrepresentthemostlikelyparametricnorm. (2) Alllimitsareensuredbytestingorstatisticalanalysis. Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 5 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com 6.6 ±15V AC Electrical Characteristics Unlessotherwisespecified,alllimitsensuredforV+=15V,V−=−15V,V =V =0VandR >1MΩ.Boldfacelimitsapply CM O L atthetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LM7121I LIMIT(2) UNIT SR SlewRate(3) A =+2,R =1kΩ,V =20V 1300 V/µs V L O PP GBW UnityGain-Bandwidth R =1kΩ 175 MHz L Ø PhaseMargin 63 Deg m R =100Ω,A =+1 235 f(−3dB) Bandwidth(4)(5) L V MHz R =100Ω,A =+2 50 L V t SettlingTime 10V Step,to0.1%,R =500Ω 74 ns s PP L t,t RiseandFallTime(5) A =+2,R =100Ω,V =0.4V 5.3 ns r f V L O PP A DifferentialGain A =+2,R =150Ω 0.3% D V L Ø DifferentialPhase A =+2,R =150Ω 0.65 Deg D V L e Input-ReferredVoltageNoise f=10kHz 17 nV/√HZ n i Input-ReferredCurrentNoise f=10kHz 1.9 pA/√HZ n 2V Output,R =150Ω, 0.065% PP L A =+2,f=1MHz V T.H.D. TotalHarmonicDistortion 2V Output,R =150Ω, 0.52% PP L A =+2,f=5MHz V (1) TypicalValuesrepresentthemostlikelyparametricnorm. (2) Alllimitsareensuredbytestingorstatisticalanalysis. (3) Slewrateistheaverageoftherisingandfallingslewrates. (4) Unitygainoperationfor±5Vand±15Vsuppliesiswithafeedbacknetworkof510Ωand3pFinparallel(seeApplicationand Implementation).For+5Vsinglesupplyoperation,feedbackisadirectshortfromtheoutputtotheinvertinginput. (5) A =+2operationwith2kΩresistorsand2pFcapacitorfromsummingnodetoground. V 6.7 ±5V DC Electrical Characteristics Unlessotherwisespecified,alllimitsensuredforV+=5V,V−=−5V,V =V =0VandR >1MΩ.Boldfacelimitsapplyat CM O L thetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LLMIM71IT2(12I) UNIT 8 mV V InputOffsetVoltage 1.6 OS 15 max 9.5 µA I InputBiasCurrent 5.5 B 12 max 4.3 µA I InputOffsetCurrent 0.07 OS 7.0 max CommonMode 6.8 MΩ R InputResistance IN DifferentialMode 3.4 MΩ C InputCapacitance CommonMode 2.3 pF IN 65 dB CMRR CommonModeRejectionRatio −2V≤V ≤2V 75 CM 60 min +PSRR PositivePowerSupplyRejectionRatio 3V≤V+≤5V 89 65 dB 60 min −PSRR NegativePowerSupplyRejectionRatio −5V≤V−≤−3V 78 65 dB 60 min (1) TypicalValuesrepresentthemostlikelyparametricnorm. (2) Alllimitsareensuredbytestingorstatisticalanalysis. 6 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 ±5V DC Electrical Characteristics (continued) Unlessotherwisespecified,alllimitsensuredforV+=5V,V−=−5V,V =V =0VandR >1MΩ.Boldfacelimitsapplyat CM O L thetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LLMIM71IT2(12I) UNIT V 3 2.5 min V InputCommonModeVoltageRange CMRR≥60dB CM V −3 −2.5 max 60 dB A LargeSignalVoltageGain R =2kΩ,V =3V 66 V L O PP 58 min 3.0 V 3.62 2.75 min R =2kΩ L −3.0 V −3.62 −2.70 max V OutputSwing O 2.5 V 3.1 2.3 min R =150Ω L −2.15 V −2.8 −2.00 max 38 mA Sourcing 53 33 min I OutputShortCircuitCurrent SC 21 mA Sinking 29 19 min 6.4 mA I SupplyCurrent 5.1 S 7.2 max 6.8 ±5V AC Electrical Characteristics Unlessotherwisespecified,alllimitsensuredforV+=5V,V−=−5V,V =V =0VandR >1MΩ.Boldfacelimitsapplyat CM O L thetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LLMIM71IT2(12I) UNIT SR SlewRate(3) A =+2,R =1kΩ,V =6V 520 V/µs V L O PP GBW UnityGain-Bandwidth R =1kΩ 105 MHz L Ø PhaseMargin R =1kΩ 74 Deg m L R =100Ω,A =+1 160 MHz f(−3dB) Bandwidth(4)(5) L V R =100Ω,A =+2 50 MHz L V t SettlingTime 5V Step,to0.1%,R =500Ω 65 ns s PP L t,t RiseandFallTime(5) A =+2,R =100Ω,V =0.4V 5.8 ns r f V L O PP A DifferentialGain A =+2,R =150Ω 0.3% D V L Ø DifferentialPhase A =+2,R =150Ω 0.65 Deg D V L e Input-ReferredVoltageNoise f=10kHz 17 nV/√Hz n i Input-ReferredCurrentNoise f=10kHz 2 pA/√Hz n 2V Output,R =150Ω, PP L 0.1% A =+2,f=1MHz V T.H.D. TotalHarmonicDistortion 2V Output,R =150Ω, PP L 0.6 A =+2,f=5MHz V (1) TypicalValuesrepresentthemostlikelyparametricnorm. (2) Alllimitsareensuredbytestingorstatisticalanalysis. (3) Slewrateistheaverageoftherisingandfallingslewrates. (4) Unitygainoperationfor±5Vand±15Vsuppliesiswithafeedbacknetworkof510Ωand3pFinparallel(seeApplicationand Implementation).For+5Vsinglesupplyoperation,feedbackisadirectshortfromtheoutputtotheinvertinginput. (5) A =+2operationwith2kΩresistorsand2pFcapacitorfromsummingnodetoground. V Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 7 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com 6.9 +5V DC Electrical Characteristics Unlessotherwisespecified,alllimitsensuredforV+=+5V,V−=0V,V =V =V+/2andR >1MΩ.Boldfacelimitsapply CM O L atthetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LLMIM71IT2(12I) UNIT V InputOffsetVoltage 2.4 mV OS I InputBiasCurrent 4 µA B I InputOffsetCurrent 0.04 µA OS R CommonMode 2.6 M IN InputResistance DifferentialMode 3.4 M C InputCapacitance CommonMode 2.3 pF IN CMRR CommonModeRejectionRatio 2V≤V ≤3V 65 dB CM +PSRR PositivePowerSupplyRejectionRatio 4.6V≤V+≤5V 85 dB −PSRR NegativePowerSupplyRejectionRatio 0V≤V−≤0.4V 61 dB 3.5 Vmin V InputCommon-ModeVoltageRange CMRR45dB CM 1.5 Vmax A LargeSignalVoltageGain R =2kΩtoV+/2 64 dB V L R =2kΩtoV+/2,High 3.7 L R =2kΩtoV+/2,Low 1.3 L V OutputSwing V O R =150ΩtoV+/2,High 3.48 L R =150ΩtoV+/2,Low 1.59 L I OutputShortCircuitCurrent Sourcing 33 mA SC Sinking 20 mA I SupplyCurrent 4.8 mA S (1) TypicalValuesrepresentthemostlikelyparametricnorm. (2) Alllimitsareensuredbytestingorstatisticalanalysis. 6.10 +5V AC Electrical Characteristics Unlessotherwisespecified,alllimitsensuredforV+=+5V,V−=0V,V =V =V+/2andR >1MΩ.Boldfacelimitsapply CM O L atthetemperatureextremes. PARAMETER TESTCONDITIONS TYP(1) LM7121I LIMIT(2) UNIT SR SlewRate(3) AV=+2,RL=1kΩtoV+/2, 145 V/µs V =1.8V O PP GBW UnityGain-Bandwidth R =1ktoV+/2 80 MHz L Ø PhaseMargin R =1ktoV+/2 70 Deg m L R =100ΩtoV+/2,A =+1 200 f(−3dB) Bandwidth(4)(5) L V MHz R =100ΩtoV+/2,A =+2 45 L V t,t RiseandFallTime(5) A =+2,R =100Ω,V =0.2V 8 ns r f V L O PP 0.6V Output,R =150Ω, PP L 0.067% A =+2,f=1MHz V T.H.D. TotalHarmonicDistortion 0.6V Output,R =150Ω, PP L 0.33% A =+2,f=5MHz V (1) TypicalValuesrepresentthemostlikelyparametricnorm. (2) Alllimitsareensuredbytestingorstatisticalanalysis. (3) Slewrateistheaverageoftherisingandfallingslewrates. (4) Unitygainoperationfor±5Vand±15Vsuppliesiswithafeedbacknetworkof510Ωand3pFinparallel(seeApplicationand Implementation).For+5Vsinglesupplyoperation,feedbackisadirectshortfromtheoutputtotheinvertinginput. (5) A =+2operationwith2kΩresistorsand2pFcapacitorfromsummingnodetoground. V 8 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 6.11 Typical Characteristics Figure1.SupplyCurrentvs.SupplyVoltage Figure2.SupplyCurrentvs.Temperature Figure3.InputOffsetVoltagevs.Temperature Figure4.InputBiasCurrentvsTemperature Figure5.InputOffsetVoltagevs.CommonModeVoltage Figure6.InputOffsetVoltagevs.CommonModeVoltage atV =±15V atV =±5V S S Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 9 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Characteristics (continued) Figure7.ShortCircuitCurrentvs.Temperature(Sourcing) Figure8.ShortCircuitCurrentvsTemperature(Sinking) Figure9.OutputVoltagevsOutputCurrent Figure10.OutputVoltagevsOutputCurrent (ISINK,VS=±15V) (ISOURCE,VS=±15V) Figure11.OutputVoltagevsOutputCurrent Figure12.OutputVoltagevsOutputCurrent (ISOURCE,VS=±5V) (ISINK,VS=±5V) 10 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Characteristics (continued) Figure13.OutputVoltagevs.OutputCurrent Figure14.OutputVoltagevsOutputCurrent (ISOURCE,VS=+5V) (ISINK,VS=+5V) Figure15.CMRRvs.Frequency Figure16.PSRRvs.Frequency Figure18.OpenLoopFrequencyResponse Figure17.PSRRvs.Frequency Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 11 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Characteristics (continued) Figure19.OpenLoopFrequencyResponse Figure20.OpenLoopFrequencyResponse Figure21.UnityGainFrequencyvs.SupplyVoltage Figure22.GBWPat10MHzvs.SupplyVoltage Figure23.LargeSignalVoltageGainvs.Load,VS=±15V Figure24.LargeSignalVoltageGainvs.Load,VS=±5V 12 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Characteristics (continued) Figure25.InputVoltageNoisevs.Frequency Figure26.InputCurrentNoisevs.Frequency Figure27.InputVoltageNoisevs.Frequency Figure28.InputCurrentNoisevs.Frequency Figure30.SlewRatevs.InputVoltage Figure29.SlewRatevs.SupplyVoltage Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 13 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Characteristics (continued) Figure31.SlewRatevs.InputVoltage Figure32.SlewRatevs.LoadCapacitance Figure33.LargeSignalPulseResponse, Figure34.LargeSignalPulseResponse, A =-1V =±15V A =-1,V =±5V V S V S Figure35.LargeSignalPulseResponse, Figure36.LargeSignalPulseResponse, AV=-1,VS=+5V AV=+1,VS=±15V 14 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Characteristics (continued) Figure38.LargeSignalPulseResponse, Figure37.LargeSignalPulseResponse, A =+1,V =+5V A =+1,V =±5V V S V S Figure39.LargeSignalPulseResponse, Figure40.LargeSignalPulseResponse, A =+2,V =±15V V S A =+2,V =±5V V S Figure42.SmallSignalPulseResponse, Figure41.LargeSignalPulseResponse, A =-1,V =±15V,R =100Ω A =+2,V =+5V V S L V S Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 15 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Characteristics (continued) Figure43.SmallSignalPulseResponse, Figure44.SmallSignalPulseResponse, A =-1,V =±5V,R =100Ω V S L A =-1,V =+5V,R =100Ω V S L Figure45.SmallSignalPulseResponse, Figure46.SmallSignalPulseResponse, A =+1,V =±15V,R =100Ω A =+1,V =±5V,R =100Ω V S L V S L Figure47.SmallSignalPulseResponse, Figure48.SmallSignalPulseResponse, A =+1,V =+5V,R =100Ω A =+2,V =±15V,R =100Ω V S L V S L 16 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Characteristics (continued) Figure50.SmallSignalPulseResponse, Figure49.SmallSignalPulseResponse, A =+2,V =+5V,R =100Ω A =+2,V =±5V,R =100Ω V S L V S L Figure51.ClosedLoopFrequencyResponsevs. Figure52.ClosedLoopFrequencyResponse Temperature, vs.Temperature VS=±15V,AV=+1,RL=100Ω VS=±5V,AV=+1,RL=100Ω Figure53.ClosedLoopFrequencyResponse Figure54.ClosedLoopFrequencyResponse vs.Temperature, vs.Temperature, VS=+5V,AV=+1,RL=100Ω VS=±15V,AV=+2,RL=100Ω Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 17 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Characteristics (continued) Figure55.ClosedLoopFrequncyResponse Figure56.ClosedLoopFrequencyResponse vs.Temperature, vs.Temperature, V =±5V,A =+2,R =100Ω V =+5V,A =+2,R =100Ω S V L S V L Figure57.ClosedLoopFrequencyResponse Figure58.ClosedLoopFrequencyResponse vs.CapacitanceLoad vs.CapacitiveLoad (A =+1,V =±15V) (A =+1,V =±5V) V S V S Figure59.ClosedLoopFrequencyResponse Figure60.ClosedLoopFrequencyResponse vs.CapacitiveLoad vs.CapacitiveLoad (A =+2,V =±15V) (A =+2,V =±5V) V S V S 18 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Characteristics (continued) Figure61.TotalHarmonicDistortionvs.Frequency Figure62.TotalHarmonicDistortionvs.Frequency Figure63.TotalHarmonicDistortionvs.Frequency Figure64.TotalHarmonicDistortionvs.Frequency Figure65.UndistortedOutputSwingvs.Frequency Figure66.UndistortedOutputSwingvs.Frequency Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 19 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Characteristics (continued) Figure67.UndistortedOutputSwingvs.Frequency Figure68.TotalPowerDissipationvs.AmbientTemperature 20 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 7 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. 7.1 Application Information Table1depictsthemaximumoperatingsupplyvoltageforeachpackagetype Table1.MaximumSupplyVoltageValues SOT-23 SO-8 SingleSupply 10V 30V DualSupplies ±5V ±15V Stable unity gain operation is possible with supply voltage of 5 V for all capacitive loads. This allows the possibilityofusingthedeviceinportableapplicationswithlowsupplyvoltageswithminimumcomponentsaround it. Above a supply voltage of 6 V (±3 V Dual supplies), an additional resistor and capacitor (shown in Figure 69) shouldbeplacedinthefeedbackpathtoachievestabilityatunitygainoverthefulltemperaturerange. The package power dissipation should be taken into account when operating at high ambient temperatures and/or high power dissipative conditions. Refer to the power derating curves in the data sheet for each type of package. In determining maximum operable temperature of the device, make sure the total power dissipation of the device is considered; this includes the power dissipated in the device with a load connected to the output as well as the nominaldissipationoftheopamp. The device is capable of tolerating momentary short circuits from its output to ground but prolonged operation in thismodewilldamagethedevice,ifthemaximumallowedjunctiontemperationisexceeded. Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 21 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com 7.2 Typical Applications Figure69. TypicalCircuitforA =+1Operation(V =6V) V S Figure70. SimpleCircuittoImproveLinearityandOutputDriveCurrent Figure71. A =-1 V C =2pFforR =100Ω C L C =OpenforR =Open C L Figure72. A =+2 V 22 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Applications (continued) Figure73. A =+2,CapacitiveLoad V R =0Ω,C =OpenforV <6V F C S R =510Ω,C =3pFforV ≥6V F C S Figure74. A =+1 V R =0Ω,C =OpenforV <6V F C S R =510Ω,C =3pFforV ≥6V F C S Figure75. A =+1.V =+5V,SingleSupplyOperation V S 7.2.1 DesignRequirements 7.2.1.1 CurrentBoostCircuit ThecircuitinFigure70canbeusedtoachievegoodlinearityalongwithhighoutputcurrentcapability. By proper choice of R , the LM7121 output can be set to supply a minimal amount of current, thereby improving 3 itsoutputlinearity. R canbeadjustedtoallowfordifferentloads: 3 R =0.1R (1) 3 L Figure 70 has been set for a load of 100 Ω. Reasonable speeds (< 30 ns rise and fall times) can be expected up to120mAppofloadcurrent(seeFigure77forstepresponseacrosstheload). Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 23 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com Typical Applications (continued) 7.2.2 DetailedDesignProcedure It is very important to keep the lead lengths to a minimum and to provide a low impedance current path by using aground-planeontheboard. CAUTION If R is removed, the current balance at the output of LM7121 would be disturbed and L it would have to supply the full amount of load current. This might damage the part if powerdissipationlimitisexceeded. 7.2.2.1 ColorVideoonTwistedPairsUsingSingleSupply The circuit shown in Figure 76 can be used to drive in excess of 25 meters length of twisted pair cable with no lossofresolutionorpicturedefinitionwhendrivingaNTSCmonitorattheloadend. PinnumbersshownareforSO-8package. *InputterminationofNTSCmonitor. Figure76. SingleSupplyDifferentialTwisterPairCableTransmitter/Receiver, 8.5V≤ V ≤ 30V CC 24 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

LM7121 www.ti.com SNOS750A–AUGUST1999–REVISEDOCTOBER2014 Typical Applications (continued) DifferentialGainandDifferentialPhaseerrorsmeasuredattheloadarelessthan1%and1˚respectively R and C can be adjusted for various cable lengths to compensate for the line losses and for proper response G C at the output. Values shown correspond to a twisted pair cable length of 25 meters with about 3 turns/inch (see Figure78forstepresponse). The supply voltage can vary from 8.5 V up to 30 V with the output rise and fall times under 12 ns. With the componentvaluesshown,theoverallgainfromtheinputtotheoutputisabout1. Even though the transmission line is not terminated in its nominal characteristic impedance of about 600 Ω, the resulting reflection at the load is only about 5% of the total signal and in most cases can be neglected. Using 75 termination instead, has the advantage of operating at a low impedance and results in a higher realizable bandwidthandsignalfidelity. 7.2.3 ApplicationPerformancePlots Figure78.StepResponsetoa1V InputSignal PP Figure77.Waveformacrossa100-ΩLoad Measuredacrossthe75-ΩLoad Copyright©1999–2014,TexasInstrumentsIncorporated SubmitDocumentationFeedback 25 ProductFolderLinks:LM7121

LM7121 SNOS750A–AUGUST1999–REVISEDOCTOBER2014 www.ti.com 8 Device and Documentation Support 8.1 Trademarks Alltrademarksarethepropertyoftheirrespectiveowners. 8.2 Electrostatic Discharge Caution Thesedeviceshavelimitedbuilt-inESDprotection.Theleadsshouldbeshortedtogetherorthedeviceplacedinconductivefoam duringstorageorhandlingtopreventelectrostaticdamagetotheMOSgates. 8.3 Glossary SLYZ022—TIGlossary. Thisglossarylistsandexplainsterms,acronyms,anddefinitions. 9 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. 26 SubmitDocumentationFeedback Copyright©1999–2014,TexasInstrumentsIncorporated ProductFolderLinks:LM7121

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 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) LM7121IM NRND SOIC D 8 95 TBD Call TI Call TI -40 to 85 LM71 21IM LM7121IM/NOPB ACTIVE SOIC D 8 95 Green (RoHS SN Level-1-260C-UNLIM -40 to 85 LM71 & no Sb/Br) 21IM LM7121IM5 NRND SOT-23 DBV 5 1000 TBD Call TI Call TI -40 to 85 A03A LM7121IM5/NOPB ACTIVE SOT-23 DBV 5 1000 Green (RoHS SN Level-1-260C-UNLIM -40 to 85 A03A & no Sb/Br) LM7121IM5X/NOPB ACTIVE SOT-23 DBV 5 3000 Green (RoHS SN Level-1-260C-UNLIM -40 to 85 A03A & no Sb/Br) LM7121IMX/NOPB ACTIVE SOIC D 8 2500 Green (RoHS SN Level-1-260C-UNLIM -40 to 85 LM71 & no Sb/Br) 21IM (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) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (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. Addendum-Page 1

PACKAGE OPTION ADDENDUM www.ti.com 6-Feb-2020 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 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

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