OPA657

OPA657SBOS197B–DECEMBER2001–REVISEDMAY2004©2001-2004,TexasInstrumentsIncorporated1.6GHz,Low-Noise,FET-InputOPERATIONALAMPLIFIERPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.FEATURESHIGHGAINBANDWIDTHPRODUCT:1.6GHzHIGHBANDWIDTH275MHz(G=+10)LOWINPUTOFFSETVOLTAGE:±0.25mVLOWINPUTBIASCURRENT:2pALOWINPUTVOLTAGENOISE:4.8nV/HzHIGHOUTPUTCURRENT:70mAFASTOVERDRIVERECOVERYAPPLICATIONSWIDEBANDPHOTODIODEAMPLIFIERWAFERSCANNINGEQUIPMENTADCINPUTAMPLIFIERTESTANDMEASUREMENTFRONTENDHIGHGAINPRECISIONAMPLIFIERSLEWVOLTAGEVSBWRATENOISEDEVICE(V)(MHz)(V/µS)(nV/√HZ)AMPLIFIERDESCRIPTIONOPA355+52003005.80Unity-GainStableCMOSOPA655±54002906Unity-GainStableFET-InputOPA656±55001707Unity-GainStableFET-InputOPA627±1516554.5Unity-GainStableFET-InputTHS4601±151801005.4Unity-GainStableFET-InputRELATEDOPERATIONALAMPLIFIERPRODUCTSDESCRIPTIONTheOPA657combinesahighgainbandwidth,lowdistor-tion,voltage-feedbackopampwithalowvoltagenoiseJFET-inputstagetoofferaveryhighdynamicrangeamplifierforhighprecisionADC(Analog-to-DigitalConverter)drivingorwidebandtransimpedanceapplications.Photodiodeapplicationswillseeimprovednoiseandbandwidthusingthisdecompensated,highgainbandwidthamplifier.VerylowlevelsignalscanbesignificantlyamplifiedinasingleOPA657gainstagewithexceptionalbandwidthandaccuracy.Havingahigh1.6GHzgainbandwidthproductwillgive10MHzsignalbandwidthsuptogainsof160V/V(44dB).Theverylowinputbiascurrentandcapacitancewillsupportthisperformanceevenforrelativelyhighsourceimpedances.BroadbandphotodetectorapplicationswillbenefitfromthelowvoltagenoiseJFETinputsfortheOPA657.TheJFETinputcontributesvirtuallynocurrentnoisewhileforbroadbandapplications,alowvoltagenoiseisalsorequired.Thelow4.8nV/Hzinputvoltagenoisewillprovideexceptionalinputsensitivityforhigherbandwidthapplications.Theexampleshownbelowwillgiveatotalequivalentinputnoisecurrentof1.8pA/Hzovera10MHzbandwidth.OPA657OPA657WidebandPhotodiodeTransimpedanceAmplifier(12pF)λ–Vb200kΩVO0.1pFFrequency200kΩTRANSIMPEDANCEBANDWIDTH11610696867666100kHz1MHz10MHz50MHzTransimpedanceGain(dB)10MHzBandwidthAlltrademarksarethepropertyoftheirrespectiveowners.OPA6572SBOS197B(1)RANGEMARKINGNUMBER(2)MEDIA,QUANTITYOPA657USO-8SurfaceMountD–40°Cto+85°COPA657UOPA657URails,100OPA657U/2K5TapeandReel,2500OPA657UBSO-8SurfaceMountD–40°Cto+85°COPA657UBOPA657UBRails,100OPA657UB/2K5TapeandReel,2500OPA657NSOT23-5DBV–40°Cto+85°CA57OPA657N/250TapeandReel,250OPA657N/3KTapeandReel,3000OPA657NBSOT23-5DBV–40°Cto+85°CA57OPA657NB/250TapeandReel,250OPA657NB/3KTapeandReel,3000NOTES:(1)Forthemostcurrentpackageandorderinginfromation,seethePackageOptionAddendumlocatedattheendofthisdatasheet.PACKAGE/ORDERINGINFORMATION(1)ELECTROSTATICDISCHARGESENSITIVITYThisintegratedcircuitcanbedamagedbyESD.TexasInstrumentsrecommendsthatallintegratedcircuitsbehandledwithappropriateprecautions.Failuretoobserveproperhan-dlingandinstallationprocedurescancausedamage.ESDdamagecanrangefromsubtleperformancedegrada-tiontocompletedevicefailure.Precisionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.ABSOLUTEMAXIMUMRATINGS(1)SupplyVoltage.................................................................................±6.5VInternalPowerDissipation...........................SeeThermalCharacteristicsDifferentialInputVoltage.....................................................................±VSInputVoltageRange............................................................................±VSStorageTemperatureRange.........................................–40°Cto+125°CLeadTemperature.........................................................................+260°CJunctionTemperature(TJ)...........................................................+175°CESDRating(HumanBodyModel)..................................................2000V(MachineModel)............................................................200VNOTE:(1)Stressesabovetheseratingsmaycausepermanentdamage.Exposuretoabsolutemaximumconditionsforextendedperiodsmaydegradedevicereliability.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthosespecifiedisnotimplied.PINCONFIGURATIONSTopViewSO-8TopViewSOT23-512348765NC+VSOutputNCNCInvertingInputNoninvertingInput–VS12354+VSInvertingInputOutput–VSNoninvertingInputA5712354PinOrientation/PackageMarkingOPA6573SBOS197B=±5VRF=453Ω,RL=100Ω,andG=+10,unlessotherwisenoted.Figure1forACperformance.OPA657U,N(Standard-Grade)TYPMIN/MAXOVERTEMPERATURE0°Cto–40°CtoMIN/TESTPARAMETERCONDITIONS+2