LM321 Low Power Single Operational ... - Texas Instruments

1 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityLM321 SNOS935C FEBRUARY2001 REVISEDDECEMBER2014LM321 Low PowerSingleOperationalAmplifier1 Features3 DescriptionThe LM321bringsperformanceand economyto low1 (VCC= 5 V, TA= 25 C. highunitygainfrequencyandspecified.)a s slewrate,the quiescentcurrent Gain-BandwidthProduct1 MHzis only430- A/amplifier(5 V). Theinputcommon Low SupplyCurrent430 Amoderangeincludesgroundand thereforethe deviceis able to operatein singlesupplyapplicationsas well Low InputBiasCurrent45 nAas in is alsocapableof WideSupplyVoltageRange3 V to 32 Vcomfortablydrivinglargecapacitiveloads.

2 StableWithHighCapacitiveLoadsTheLM321is availablein the SOT-23package. SingleVersionof LM324 Overallthe LM321is a low Power ,widesupplyrangeperformanceoperatio nalamplifierthatcanbe2 Applicationsdesignedintoa widerangeof applicationsat aneconomicalpricewithoutsacrificingvalua bleboard Chargersspace. PowerSupplies Industrial:Controls,InstrumentsDeviceInf ormation(1) DesktopsPARTNUMBERPACKAGEBODYSIZE(NOM) CommunicationsInfrastructureLM321 SOT(5) (1) For all availablepackages,see the orderableaddendumatthe end of the IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand FEBRUARY2001 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE.

3 Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (March2013)to RevisionCPage AddedPin Configurationand Functionssection,ESDR atingstable,FeatureDescriptionsection,De viceFunctionalModes,Applicationand Implementationsection,PowerSupplyRecomme ndationssection,Layoutsection,Deviceand DocumentationSupportsection,andMechanica l,Packaging,and (March2013)to RevisionBPage Changedlayoutof NationalDataSheetto TI 2001 2014 , FEBRUARY2001 REVISEDDECEMBER20145 Pin Configurationand FunctionsDBVP ackage5-PinSOT-23 Top ViewPin FunctionsPINI/ODESCRIPTIONNAMENO.+IN1 INoninvertinginputV 2 Negative(lowest)powersupply IN3 IInvertinginputOUTPUT4 OOutputV+5 Positive(highest)powersupply6 (1)MINMAXUNITD ifferentialInputVoltage SupplyVoltageInputCurrent(VIN< V)(2)50mASupplyVoltage(V+- V )32 VInputVoltage GND,V+ 15 V and TA= 25 C(3)ContinuousJunctionTemperature(4)150 CMountingTemperature:Leadtemperature(Sol dering,10 sec)260 CMountingTemperature.

4 Infrared(10 sec)215 CStoragetemperature,Tstg 65150 C(1)StressesbeyondthoselistedunderAbsolu teMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)This inputcurrentwill only existwhenthe voltageat any of the inputleadsis is due to the collectorbasejunctionofthe inputPNPtransistorsbecomingforwardbiased and therebyactingas additionto this diodeaction,thereisalso lateralNPNparasitictransistoractionon the IC transistoractioncan causethe outputvoltagesof the operationalampliferto go to the V+ voltagelevel(or to groundfor a largeoverdrive)for the time durationthat an inputis is notdestructiveand normaloutputstateswill re-establishwhenthe inputvoltage,whichwas negative,againreturnsto a valuegreaterthan (at 25 C).

5 (3)Shortcircuitsfromthe outputV+ can causeexcessiveheatingand groundthemaximumoutputcurrentis approximately40mAindependentof the magnitudeof V+. At valuesof supplyvoltagein excessof +15V,continuousshortcircuitscan exceedthe powerdissipationratingsand causeeventualdestruction.(4)The maximumpowerdissipationis a functionof TJ(MAX), JA , and TA. The maximumallowablepowerdissipationat any ambienttemperatureis PD = (TJ(MAX)- TA)/ JA. All numbersapplyfor packagessoldereddirectlyontoa PC (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 300V(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a 2001 2014 ,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks:LM321LM321 SNOS935C FEBRUARY2001 4085 (1)DBVUNIT5 PINSR JAJunction-to-ambientthermalresistance26 5 C/W(1)For moreinformationabouttraditionaland new thermalmetrics,see theIC PackageThermalMetricsapplicationreport, ,all limitsspecifiedfor at TA= 25 C.

6 V+= 5 V, V = 0 V, VO= VPARAMETERTESTCONDITIONSMINTYPMAXUNITVOS I nputOffsetVoltage(1)27mV(1), 40 C TJ 85 C9 IOSI nputOffsetCurrent550nA 40 C TJ 85 C150 IBInputBiasCurrent(2)45250nA 40 C TJ 85 C500 VCMI nputCommon-ModeVoltageV+= 30 V(3), for CMRR> = 50dB0V+- += 30 V(3), for CMRR> = 50dB, 40 C V+- 2TJ 85 CAVL argeSignalVoltageGain(V+= 15 V, RL= 2k , VO= V to )V/mV(V+= 15 V, RL= 2k , VO= V to ), 40 C TJ 85 CPSRRP owerSupplyRejectionRatioRS 10k ,65100dBV+ 5 V to 30 VCMRRC ommonModeRejectionRS 10k 6585dBRatioVOOutputSwingVOHV+= 30 V, RL= 2k , 40 C TJ 85 C26VV+= 30 V, RL= 10k , 40 C TJ 85 C2728 VOLV+= 5 V, RL= 10k , 40 C TJ 85 C520mVISS upplyCurrent,No LoadV+= 5 += 5 V, 40 C TJ 85 += 30 += 30 V, 40 C TJ 85 +1 V, V+= 15 V, VO= 2 V2040mAVID= +1 V, V+= 15 V, VO= 2 V, 40 C 1020TJ 85 CISINKO utputCurrentSinkingVID= 1 V, V+= 15 V, VO= 2 V1020mAVID= 1 V, V+= 15 V, VO= 2 V, 40 C TJ 85 C58 VID= 1 V, V+= 15 V, VO= V12100 A(1)VO V, RS = 0 with V+ from5 V to 30 V.

7 And overthe full inputcommon-moderange(0 V to V+ - V) at 25 C.(2)The directionof the inputcurrentis out of the IC due to the currentis essentiallyconstant,independentof thestateof the outputso no loadingchangeexistson the inputlines.(3)The inputcommon-modevoltageof eitherinputsignalvoltageshouldnot be allowedto go negativeby V (at 25 C). Theupperend of the common-modevoltagerangeis V+ - V at 25 C, but eitheror bothinputscan go to +32 V withoutdamage,independentof the magnitudeof V+.4 SubmitDocumentationFeedbackCopyright 2001 2014 , FEBRUARY2001 REVISEDDECEMBER2014 ElectricalCharacteristics(continued)Unle ssotherwisespecified,all limitsspecifiedfor at TA= 25 C.

8 V+= 5 V, V = 0 V, VO= VPARAMETERTESTCONDITIONSMINTYPMAXUNITIOO utputShortCircuitto GroundV+= 15 V4085mA(4)SRSlewRateV+= 15 V, RL= 2k , VIN= to 3 V, CL= s100pF,UnityGainGBWGainBandwidthProductV += 30 V, f = 100kHz,VIN= 10 mV, RL1 MHz=2k , CL= 100 pF mPhaseMargin60degreesTHDT otalHarmonicDistortionf = 1kHz,AV= 20dB,RL= 2k , VO= 2 VPP, 100 pF, V+= 30 VenEquivalentInputNoiseVoltagef = 1kHz,RS= 100 , V+= 30 V40nV/ Hz(4)Shortcircuitsfromthe outputV+ can causeexcessiveheatingand groundthemaximumoutputcurrentis approximately40mAindependentof the magnitudeof V+. At valuesof supplyvoltagein excessof +15V,continuousshortcircuitscan exceedthe powerdissipationratingsand 2001 2014 ,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks:LM321LM321 SNOS935C FEBRUARY2001 ,VS= 5 V, singlesupply,TA= 25 LargeSignalPulseResponseFigure1.

9 SmallSignalPulseResponseFigure3. SupplyCurrentvs. SupplyVoltageFigure4. SinkingCurrentvs OutputVoltageFigure5. SourceCurrentvs. OutputVoltageFigure6. OpenLoopFrequencyResponse6 SubmitDocumentationFeedbackCopyright 2001 2014 , FEBRUARY2001 REVISEDDECEMBER20147 LM321operationalamplifercan operatewitha singleor dualpowersupplyvoltage,has true-differentialinputs,and remainsin the linearmodewith an inputcommon-modevoltageof 0 widerangeof powersupplyvoltages,with little changein 25 C amplifieroperationis possibledownto a minimumsupplyvoltageof 3 V. Largedifferentialinputvoltagescan be easilyaccommodatedand,as inputdifferentialvoltageprotectiondiodes are not needed,no differentialinputvoltagemaybe largerthanV+ providedto preventthe inputvoltagesfromgoingnegativemorethan VDC(at25 C).

10 An inputclampdiodewith a resistorto the IC inputterminalcan be reducethe powersupplydrain,the amplifierhas a classA outputstagefor smallsignallevelswhichconvertsto classB in a amplifiersto bothsourceand PNPexternalcurrentboosttransistorscan be usedto extendthe powercapabilityofthe outputvoltageneedsto raiseapproximately1 diodedropabovegroundto bias the onchip verticalPNPtransistorfor AC applications,wherethe loadis capacitivelycoupledto the outputof the amplifier,a resistorshouldbeused,fromthe outputof the amplifierto groundto increasethe classA bias currentand to applieddirectlyto the outputof the amplifierreducethe 50 pF can be accommodatedusingthe resistiveisolationshouldbe usedif largeload capacitancemustbe drivenby the bias networkof the LM321establishesa supplycurrentwhichis independentof the magnitudeof the powersupplyvoltageoverthe rangeof from3 VDCto 30 groundor to the positivepowersupplyshouldbe of destroyed,not as a resultof the shortcircuitcurrentcausingmetalfusing.