LM2904

April2008Rev111/2222LM2904LowpowerdualoperationalamplifierFeatures■Internallyfrequencycompensated■LargeDCvoltagegain:100dB■Widebandwidth(unitygain):1.1MHz(temperaturecompensated)■Verylowsupplycurrent/op(500µA)essentiallyindependentofsupplyvoltage■Lowinputbiascurrent:20nA(temperaturecompensated)■Lowinputoffsetcurrent:2nA■Inputcommon-modevoltagerangeincludesnegativerail■Differentialinputvoltagerangeequaltothepowersupplyvoltage■Largeoutputvoltageswing0Vto(VCC+-1.5V)DescriptionThiscircuitconsistsoftwoindependent,highgain,internallyfrequencycompensatedoperationalamplifierswhichweredesignedspecificallyforautomotiveandindustrialcontrolsystem.Itoperatesfromasinglepowersupplyoverawiderangeofvoltages.Thelowpowersupplydrainisindependentofthemagnitudeofthepowersupplyvoltage.Applicationareasincludetransduceramplifiers,DCgainblocksandalltheconventionalop-ampcircuitswhichnowcanbemoreeasilyimplementedinsinglepowersupplysystems.Forexample,thesecircuitscanbedirectlysuppliedfromthestandard+5Vwhichisusedinlogicsystemsandwilleasilyprovidetherequiredinterfaceelectronicswithoutrequiringanyadditionalpowersupply.Inthelinearmodetheinputcommon-modevoltagerangeincludesgroundandtheoutputvoltagecanalsoswingtoground,eventhoughoperatedfromasinglepowersupply.NDIP8(Plasticpackage)DSO-8(Plasticmicropackage)PTSSOP8(Thinshrinksmalloutlinepackage)SMiniSO-8Pinconnections(topview)(1/2LM2904)6μA4μA100μAQ2Q3Q4Q1InvertinginputNon-invertinginputQ8Q9Q10Q11Q1250mAQ13OutputQ7Q6Q5RSCVCCCCGNDAbsolutemaximumratingsandoperatingconditionsLM29044/222AbsolutemaximumratingsandoperatingconditionsTable1.Absolutemaximumratings(AMR)SymbolParameterValueUnitVCCSupplyvoltage(1)1.Allvoltagevalues,exceptdifferentialvoltagearewithrespecttonetworkgroundterminal.±16or32VVidDifferentialinputvoltage(2)2.Differentialvoltagesarethenon-invertinginputterminalwithrespecttotheinvertinginputterminal.±32VVinInputvoltage-0.3to32VOutputshort-circuitduration(3)3.Short-circuitsfromtheoutputtoVCCcancauseexcessiveheatingifVcc+15V.Themaximumoutputcurrentisapproximately40mA,independentofthemagnitudeofVCC.Destructivedissipationcanresultfromsimultaneousshort-circuitsonallamplifiers.InfinitesIinInputcurrent(4)4.Thisinputcurrentonlyexistswhenthevoltageatanyoftheinputleadsisdrivennegative.Itisduetothecollector-basejunctionoftheinputPNPtransistorbecomingforwardbiasedandtherebyactingasinputdiodesclamps.Inadditiontothisdiodeaction,thereisalsoNPNparasiticactionontheICchip.Thistransistoractioncancausetheoutputvoltagesoftheop-ampstogototheVCCvoltagelevel(ortogroundforalargeoverdrive)forthetimedurationthananinputisdrivennegative.Thisisnotdestructiveandnormaloutputwillsetupagainforinputvoltagehigherthan-0.3V.50mAToperOperatingfree-airtemperaturerange-40to+125°CTstgStoragetemperaturerange-65to+150°CTjMaximumjunctiontemperature150°CRthjaThermalresistancejunctiontoambient(5)SO-8TSSOP8DIP8MiniSO-85.Short-circuitscancauseexcessiveheatinganddestructivedissipation.Valuesaretypical.12512085190°C/WRthjcThermalresistancejunctiontocase(5)SO-8TSSOP8DIP8MiniSO-840374139°C/WESDHBM:humanbodymodel(6)6.Humanbodymodel:A100pFcapacitorischargedtothespecifiedvoltage,thendischargedthrougha1.5kΩresistorbetweentwopinsofthedevice.Thisisdoneforallcouplesofconnectedpincombinationswhiletheotherpinsarefloating.300VMM:machinemodel(7)7.Machinemodel:A200pFcapacitorischargedtothespecifiedvoltage,thendischargeddirectlybetweentwopinsofthedevicewithnoexternalseriesresistor(internalresistor5Ω).Thisisdoneforallcouplesofconnectedpincombinationswhiletheotherpinsarefloating.200VCDM:chargeddevicemodel(8)8.Chargeddevicemodel:allpinsandthepackagearechargedtogethertothespecifiedvoltageandthendischargeddirectlytothegroundthroughonlyonepin.Thisisdoneforallpins.1.5kVLM2904Absolutemaximumratingsandoperatingconditions5/22Table2.OperatingconditionsSymbolParameterValueUnitVCCSupplyvoltage3to30VVicmCommonmodeinputvoltagerangeVCC+-1.5VToperOperatingfree-airtemperaturerange-40to+125°CElectricalcharacteristicsLM29046/223ElectricalcharacteristicsTable3.VCC+=5V,VCC-=Ground,VO=1.4V,Tamb