LM101A/LM201A/LM301A Operational Amplifiers
Literature Number: SNOSBS0C
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LM101A/LM201A/LM301AOperationalAmplifiersAugust2000
LM101A/LM201A/LM301AOperationalAmplifiers
GeneralDescription
TheLM101Aseriesaregeneralpurposeoperationalampli-fierswhichfeatureimprovedperformanceoverindustrystan-dardsliketheLM709.Advancedprocessingtechniquesmakepossibleanorderofmagnitudereductionininputcurrents,andaredesignofthebiasingcircuitryreducesthetemperaturedriftofinputcurrent.Improvedspecificationsinclude:
•Offsetvoltage3mVmaximumovertemperature(LM101A/LM201A)
•Inputcurrent100nAmaximumovertemperature(LM101A/LM201A)
•Offsetcurrent20nAmaximumovertemperature(LM101A/LM201A)
•Guaranteeddriftcharacteristics
andoutput,nolatch-upwhenthecommonmoderangeisexceeded,andfreedomfromoscillationsandcompensa-tionwithasingle30pFcapacitor.Ithasadvantagesoverinternallycompensatedamplifiersinthatthefrequencycompensationcanbetailoredtotheparticularapplica-tion.Forexample,inlowfrequencycircuitsitcanbeovercompensatedforincreasedstabilitymargin.Orthecompensationcanbeoptimizedtogivemorethanafactoroftenimprovementinhighfrequencyperformanceformostapplications.
Inaddition,thedeviceprovidesbetteraccuracyandlowernoiseinhighimpedancecircuitry.Thelowinputcurrentsalsomakeitparticularlywellsuitedforlongintervalintegratorsortimers,sampleandholdcircuitsandlowfrequencywaveformgenerators.Further,replac-ingcircuitswherematchedtransistorpairsbuffertheinputsofconventionalICopamps,itcangiveloweroffsetvoltageandadriftatalowercost.
TheLM101Aisguaranteedoveratemperaturerangeof−55˚Cto+125˚C,theLM201Afrom−25˚Cto+85˚C,andtheLM301Afrom0˚Cto+70˚C.
•Offsetsguaranteedoverentirecommonmodeandsup-plyvoltageranges
•Slewrateof10V/µsasasummingamplifier
Thisamplifieroffersmanyfeatureswhichmakeitsappli-cationnearlyfoolproof:overloadprotectionontheinput
FastAC/DCConverter
00775233
Note1:Feedforwardcompensationcanbeusedtomakeafastfullwaverectifierwithoutafilter.
©2004NationalSemiconductorCorporationDS007752www.national.com
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LM101A/LM201A/LM301AAbsoluteMaximumRatings(Note2)
IfMilitary/Aerospacespecifieddevicesarerequired,pleasecontacttheNationalSemiconductorSalesOffice/
Distributorsforavailabilityandspecifications.
LM101A/LM201A
SupplyVoltage
DifferentialInputVoltageInputVoltage(Note3)
OutputShortCircuitDuration(Note4)OperatingAmbientTemp.RangeTJMaxH-PackageN-PackageJ-Package
PowerDissipationatTA=25˚CH-Package(StillAir)(400LF/MinAirFlow)N-PackageJ-Package
ThermalResistance(Typical)θjAH-Package(StillAir)(400LF/MinAirFlow)NPackageJ-Package(Typical)θjCH-Package
StorageTemperatureRange
LeadTemperature(Soldering,10sec.)MetalCanorCeramicPlastic
ESDTolerance(Note7)
300˚C260˚C2000V25˚C/W−65˚Cto+150˚C
165˚C/W67˚C/W135˚C/W110˚C/W500mW1200mW900mW1000mW150˚C150˚C150˚C
LM301A
±22V±30V±15V
Continuous
−55˚Cto+125˚C(LM101A)−25˚Cto+85˚C(LM201A)
±18V±30V±15V
Continuous0˚Cto+70˚C
100˚C100˚C100˚C300mW700mW500mW650mW165˚C/W67˚C/W135˚C/W110˚CmW25˚C/W−65˚Cto+150˚C
300˚C260˚C2000V
ElectricalCharacteristics(Note5)
TA=TJParameter
InputOffsetVoltageInputOffsetCurrentInputBiasCurrentInputResistanceSupplyCurrent
LargeSignalVoltageGainInputOffsetVoltage
AverageTemperatureCoefficientofInputOffsetVoltageInputOffsetCurrent
AverageTemperatureCoefficientofInputOffsetCurrentInputBiasCurrent
25˚C≤TA≤TMAXTMIN≤TA≤25˚C
0.010.02
200.10.20.1
0.010.02
700.30.60.3
nAnA/˚CnA/˚CµA
Conditions
TA=25˚C,RS≤50kΩTA=25˚CTA=25˚CTA=25˚CTA=25˚C
TA=25˚C,VS=±15VVOUT=±10V,RL≥2kΩRS≤50kΩRS≤50kΩ
3.0
3.015
6.0
1030
mVµV/˚C
VS=±20VVS=±15V
50
160
25
1.5
LM101A/LM201AMin
Typ0.71.5304.01.8
3.0
1.8160
3.0
MaxMin2.01075
0.5
LM301ATyp2.03.0702.0
Max7.550250
mVnAnAMΩmAmAV/mVUnits
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LM101A/LM201A/LM301AElectricalCharacteristics(Note5)
TA=TJParameter
SupplyCurrent
LargeSignalVoltageGainOutputVoltageSwingInputVoltageRange
Common-ModeRejectionRatioSupplyVoltageRejectionRatio
(Continued)
LM101A/LM201AMin
Typ1.2
25
MaxMin2.5
15
LM301ATyp
Max
mAV/mVUnits
Conditions
TA=TMAX,VS=±20VVS=±15V,VOUT=±10VRL≥2kVS=±15VVS=±20VVS=±15VRS≤50kΩRS≤50kΩ
RL=10kΩRL=2kΩ
±12±10±15
8080
±14±13
+15,−139696
±12±10±14±13
VVVVdBdB
±12+15,−13
7070
9096
Note2:AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.Operatingratingsindicateforwhichthedeviceisfunctional,butdonoguaranteespecificperformancelimits.ElectricalCharacteristicsstateDCandACelectricalspecificationsunderparticulartestconditionswhichguaranteespecificlimits.ThisassumesthatthedeviceiswithintheOperatingRatings.Specificationsarenotguaranteedforparameterswherenolimitisgiven,however,thetypicalvalueisagoodindicationofdeviceperformance.
Note3:Forsupplyvoltageslessthan±15V,theabsolutemaximuminputvoltageisequaltothesupplyvoltage.
Note4:Continuousshortcircuitisallowedforcasetemperaturesto125˚Candambienttemperaturesto75˚CforLM101A/LM201A,and70˚Cand55˚CrespectivelyforLM301A.
Note5:Unlessotherwisespecified,thesespecificationsapplyforC1=30pF,±5V≤VS≤±20Vand−55˚C≤TA≤+125˚C(LM101A),±5V≤VS≤±20Vand−25˚C≤TA≤+85˚C(LM201A),±5V≤VS≤±15Vand0˚C≤TA≤+70˚C(LM301A).
Note6:RefertoRETS101AXforLM101AmilitaryspecificationsandRETS101XforLM101militaryspecifications.Note7:Humanbodymodel,100pFdischargedthrough1.5kΩ.
TypicalPerformanceCharacteristics
LM101A/LM201A
InputVoltageRange
OutputSwing
00775241
00775242
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LM101A/LM201A/LM301ATypicalPerformanceCharacteristics
VoltageGain
LM101A/LM201A(Continued)
00775243
GuaranteedPerformanceCharacteristics
LM301A
InputVoltageRange
OutputSwing
0077524400775245
VoltageGain
00775246
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LM101A/LM201A/LM301ATypicalPerformanceCharacteristics
SupplyCurrent
VoltageGain
0077524700775248
MaximumPowerDissipation
InputCurrent,
LM101A/LM201A/LM301A
0077524900775250
CurrentLimitingInputNoiseVoltage
00775251
00775252
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LM101A/LM201A/LM301ATypicalPerformanceCharacteristics
InputNoiseCurrent
(Continued)
CommonModeRejection
00775253
00775254
PowerSupplyRejection
ClosedLoopOutput
Impedance
00775255
00775256
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LM101A/LM201A/LM301ATypicalPerformanceCharacteristicsforVariousCompensationCircuits
(Note9)
SinglePoleCompensation
TwoPoleCompensation
00775208
00775212
CS=30pF
CS=30pFC2=10C1
FeedforwardCompensation
OpenLoopFrequency
Response
00775216
00775209
fo=3MHz
OpenLoopFrequency
ResponseOpenLoopFrequency
Response
00775213
00775217
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LM101A/LM201A/LM301ATypicalPerformanceCharacteristicsforVariousCompensationCircuits
(Note9)(Continued)
LargeSignalFrequency
Response
LargeSignalFrequency
Response
0077521000775214
LargeSignalFrequency
ResponseVoltageFollowerPulse
Response
0077521800775211
VoltageFollowerPulse
Response
InverterPulseResponse
0077521500775219
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LM101A/LM201A/LM301ATypicalApplications
(Note9)
VariableCapacitanceMultiplier
InvertingAmplifierwithBalancingCircuit
00775220
00775223
SimulatedInductor
†MaybezeroorequaltoparallelcombinationofR1andR2forminimum
offset.
SineWaveOscillator
00775221
L.R1R2C1RS=R2RP=R1
FastInvertingAmplifierwithHighInputImpedance
00775224
fo=10kHz
IntegratorwithBiasCurrentCompensation
00775222
00775225
*Adjustforzerointegratordrift.Currentdrifttypically0.1nA/˚Cover−55˚Cto+125˚Ctemperaturerange.
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LM101A/LM201A/LM301AApplicationHints(Note9)
ProtectingAgainstGross
FaultConditions
00775226
*Protectsinput†Protectsoutput
‡Protectsoutput—notneededwhenR4isused.
CompensatingforStrayInputCapacitances
orLargeFeedbackResistor
00775227
IsolatingLargeCapacitiveLoads
00775228
AlthoughtheLM101Aisdesignedfortroublefreeoperation,experiencehasindicatedthatitiswisetoobservecertain
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10
precautionsgivenbelowtoprotectthedevicesfromabnor-maloperatingconditions.Itmightbepointedoutthatthe
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LM101A/LM201A/LM301AadvicegivenhereisapplicabletopracticallyanyICopamp,althoughtheexactreasonwhymaydifferwithdifferentde-vices.
Whendrivingeitherinputfromalow-impedancesource,alimitingresistorshouldbeplacedinserieswiththeinputleadtolimitthepeakinstantaneousoutputcurrentofthesourcetosomethinglessthan100mA.Thisisespeciallyimportantwhentheinputsgooutsideapieceofequipmentwheretheycouldaccidentallybeconnectedtohighvoltagesources.Largecapacitorsontheinput(greaterthan0.1µF)shouldbetreatedasalowsourceimpedanceandisolatedwitharesistor.Lowimpedancesourcesdonotcauseaproblemunlesstheiroutputvoltageexceedsthesupplyvoltage.How-ever,thesuppliesgotozerowhentheyareturnedoff,sotheisolationisusuallyneeded.
Theoutputcircuitryisprotectedagainstdamagefromshortstoground.However,whentheamplifieroutputisconnectedtoatestpoint,itshouldbeisolatedbyalimitingresistor,astestpointsfrequentlygetshortedtobadplaces.Further,whentheampliferdrivesaloadexternaltotheequipment,itisalsoadvisabletousesomesortoflimitingresistancetoprecludemishaps.
Precautionsshouldbetakentoinsurethatthepowersup-pliesfortheintegratedcircuitneverbecomereversed—evenundertransientconditions.Withreversevoltagesgreaterthan1V,theICwillconductexcessivecur-rent,fusinginternalaluminuminterconnects.Ifthereisapossibilityofthishappening,clampdiodeswithahighpeakcurrentratingshouldbeinstalledonthesupplylines.Rever-salofthevoltagebetweenV+andV−willalwayscauseaproblem,althoughreversalswithrespecttogroundmayalsogivedifficultiesinmanycircuits.
Theminimumvaluesgivenforthefrequencycompensationcapacitorarestableonlyforsourceresistanceslessthan10kΩ,straycapacitancesonthesummingjunctionlessthan5pFandcapacitiveloadssmallerthan100pF.Ifanyoftheseconditionsarenotmet,itbecomesnecessarytoover-compensatetheamplifierwithalargercompensationcapaci-tor.Alternately,leadcapacitorscanbeusedinthefeedbacknetworktonegatetheeffectofstraycapacitanceandlargefeedbackresistorsoranRCnetworkcanbeaddedtoisolatecapacitiveloads.
AlthoughtheLM101Aisrelativelyunaffectedbysupplyby-passing,thiscannotbeignoredaltogether.Generallyitisnecessarytobypassthesuppliestogroundatleastonceoneverycircuitcard,andmorebypasspointsmayberequiredifmorethanfiveamplifiersareused.Whenfeed-forwardcompensationisemployed,however,itisadvisabletoby-passthesupplyleadsofeachamplifierwithlowinductancecapacitorsbecauseofthehigherfrequenciesinvolved.
TypicalApplications
(Note9)
StandardCompensationandOffsetBalancingCircuit
00775229
FastVoltageFollower
00775231
PowerBandwidth:15kHzSlewRate:1V/µs
FastSummingAmplifier
00775230
PowerBandwidth:250kHzSmallSignalBandwiidth:3.5MHzSlewRate:10V/µs
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LM101A/LM201A/LM301ATypicalApplications(Note9)
(Continued)
BilateralCurrentSource
00775232
R3=R4+R5R1=R2
FastAC/DCConverter(Note8)
00775233
Note8:Feedforwardcompensationcanbeusedtomakeafastfullwaverectifierwithoutafilter.
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LM101A/LM201A/LM301ATypicalApplications(Note9)
(Continued)
InstrumentationAmplifier
00775234
R1=R4;R2=R3
*,†MatchingdeterminesCMRR.
IntegratorwithBiasCurrentCompensation
VoltageComparatorforDrivingRTLLogicorHigh
CurrentDriver
00775237
00775235
*Adjustforzerointegratordrift.Currentdrifttypically0.1nA/˚Cover0˚Cto+70˚Ctemperaturerange.
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LM101A/LM201A/LM301ATypicalApplications(Note9)
(Continued)
LowFrequencySquareWaveGenerator
00775236
LowDriftSampleandHold
VoltageComparatorforDrivingDTLorTTLIntegratedCircuits
00775239
00775238
*Polycarbonate-dielectriccapacitor
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LM101A/LM201A/LM301ASchematic
(Note9)
00775201
Note9:Pinconnectionsshownarefor8-pinpackages.
ConnectionDiagrams
(TopView)
Dual-In-LinePackage
CeramicFlatpackPackage
00775240
00775204
OrderNumberLM101AJ,LM101J/883(Note10),
LM201ANorLM301AN
SeeNSPackageNumberJ08AorN08E
OrderNumberLM101AW/883orLM101W/883
SeeNSPackageNumberW10A
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LM101A/LM201A/LM301AConnectionDiagrams
View)(Continued)
(Top
Dual-In-LinePackage
MetalCanPackage
00775203
00775202
OrderNumberLM101AJ-14/883(Note10)
SeeNSPackageNumberJ14A
Note:Pin4connectedtocase.
OrderNumberLM101AH,LM101AH/883(Note10),
LM201AHorLM301AH
SeeNSPackageNumberH08C
Note10:AvailableperJM38510/10103.
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LM101A/LM201A/LM301APhysicalDimensions
unlessotherwisenoted
inches(millimeters)
MetalCanPackage(H)
OrderNumberLM101AH,LM101AH/883
LM201AHorLM301AHNSPackageNumberH08C
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LM101A/LM201A/LM301APhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
CeramicDual-In-LinePackage(J)OrderNumberLM101J/883orLM101AJ
NSPackageNumberJ08A
CeramicDual-In-LinePackage(J)OrderNumberLM101AJ-14/883NSPackageNumberJ14A
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LM101A/LM201A/LM301APhysicalDimensions
inches(millimeters)unlessotherwisenoted(Continued)
MoldedDual-In-LinePackage(N)OrderNumberLM201ANorLM301AN
NSPackageNumberN08E
CeramicFlatpackPackage(W)
OrderNumberLM101AW/883orLM101W/883
NSPackageNumberW10A
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LM101A/LM201A/LM301AOperationalAmplifiersNotes
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