OPA656--中文资料

APPLICATIONSWIDEBANDPHOTODIODEAMPLIFIERSSAMPLE-AND-HOLDBUFFERSCCDOUTPUTBUFFERSADCINPUTBUFFERSWIDEBANDPRECISIONAMPLIFIERSTESTANDMEASUREMENTFRONTENDSDESCRIPTIONTheOPA656combinesaverywideband,unity-gainstable,voltage-feedbackopampwithaFET-inputstagetoofferanultrahighdynamic-rangeamplifierforADC(Analog-to-DigitalConverter)bufferingandtransimpedanceapplications.ExtremelylowDCerrorsgivegoodprecisioninopticalapplications.Thehighunity-gainstablebandwidthandJFETinputallowsexceptionalperformanceinhigh-speed,low-noiseintegrators.ThehighinputimpedanceandlowbiascurrentprovidedbytheFETinputissupportedbytheultra-low7nV/√Hzinputvoltagenoisetoachieveaverylowintegratednoiseinwidebandphotodiodetransimpedanceapplications.BroadtransimpedancebandwidthsareachievablegiventheOPA656’shigh230MHzgainbandwidthproduct.Asshownbelow,a–3dBbandwidthof1MHzisprovidedevenforahigh1MΩtransimpedancegainfroma47pFsourcecapacitance.FEATURES500MHzUNITY-GAINBANDWIDTHLOWINPUTBIASCURRENT:2pALOWOFFSETANDDRIFT:±0.25mV,±2µV/°CLOWDISTORTION:74dBSFDRat5MHzHIGHOUTPUTCURRENT:70mALOWINPUTVOLTAGENOISE:7nV/√HzWideband,Unity-GainStable,FET-InputOPERATIONALAMPLIFIERFrequency1MΩTRANSIMPEDANCEBANDWIDTH130120110100908010kHz100kHz1MHz5MHzTransimpedanceGain(dB)1MHzBandwidthOPA656WidebandPhotodiodeTransimpedanceAmplifier(47pF)λ–Vb499kΩ499kΩVO1pFOPA656SBOS196G–DECEMBER2001–REVISEDNOVEMBER2008©2001-2008,TexasInstrumentsIncorporatedPleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.OPA656SLEWVOLTAGEVSBWRATENOISEDEVICE(V)(MHz)(V/µS)(nV/√HZ)AMPLIFIERDESCRIPTIONOPA355+52003005.8Unity-GainStableCMOSOPA655±54002906Unity-GainStableFET-InputOPA657±516007004.8Gainof+7StableFET-InputOPA627±1516554.5Unity-GainStableFET-InputTHS4601±151801005.4Unity-GainStableFET-InputRELATEDOPERATIONALAMPLIFIERPRODUCTSPRODUCTIONDATAinformationiscurrentasofpublicationdate.ProductsconformtospecificationsperthetermsofTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.Alltrademarksarethepropertyoftheirrespectiveowners.(2)MEDIA,QUANTITYOPA656USO-8SurfaceMountD–40°Cto+85°COPA656UOPA656URails,100OPA656U/2K5TapeandReel,2500OPA656UBSO-8SurfaceMountD–40°Cto+85°COPA656UBOPA656UBRails,100OPA656UB/2K5TapeandReel,2500OPA656NSOT23-5DBV–40°Cto+85°CB56OPA656N/250TapeandReel,250OPA656N/3KTapeandReel,3000OPA656NBSOT23-5DBV–40°Cto+85°CB56OPA656NB/250TapeandReel,250OPA656NB/3KTapeandReel,3000NOTE:(1)Forthemostcurrentpackageandorderinginformation,seethePackageOptionAddendumattheendofthisdocument,orseetheTIwebsiteat(2)UBandNBarehighgrade,whileUandNarestandardgrade.PACKAGE/ORDERINGINFORMATION(1)ELECTROSTATICDISCHARGESENSITIVITYThisintegratedcircuitcanbedamagedbyESD.TexasInstrumentsrecommendsthatallintegratedcircuitsbehandledwithappropriateprecautions.Failuretoobserveproperhan-dlingandinstallationprocedurescancausedamage.ESDdamagecanrangefromsubtleperformancedegrada-tiontocompletedevicefailure.Precisionintegratedcircuitsmaybemoresusceptibletodamagebecauseverysmallparametricchangescouldcausethedevicenottomeetitspublishedspecifications.ABSOLUTEMAXIMUMRATINGS(1)SupplyVoltage.................................................................................±6.5VInternalPowerDissipation...........................SeeThermalCharacteristicsDifferentialInputVoltage.....................................................................±VSInputVoltageRange............................................................................±VSStorageTemperatureRange.........................................–65°Cto+125°CLeadTemperature.........................................................................+260°CJunctionTemperature(TJ)...........................................................+150°CESDRating(HumanBodyModel)..................................................2000V(MachineModel)............................................................200VNOTE:(1)Stressesabovetheseratingsmaycausepermanentdamage.Exposuretoabsolutemaximumconditionsforextendedperiodsmaydegradedevicereliability.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthosespecifiedisnotimplied.PINCONFIGURATIONSTopViewSOTopViewSOT2312348765NC+VSOutputNCNCInvertingInputNoninvertingInput–VS12354+VSInvertingInputOutput–VSNoninvertingInputB5612354PinOrientation/PackageMarkingOPA6563SBOS196G=±5VRF=250Ω,RL=100Ω,andG=+2,unlessotherwisenoted.Figure1forACperformance.OPA656U,N(Standard-Grade)TYPMIN/MAXOVERTEMPERATURE0°Cto–40°CtoMIN/TESTPARAMETERCONDITIONS+25°C+25°C(1)70°C(2)+85°C(2)UNITSMAXLEVEL(3)ACPERFORMANCE(Figure1)Small-SignalBandwidthG=+1,VO=200mVPP,RF=0Ω500MHzTypCG=+2,VO=200mVPP200MHzTypCG=+5,VO=200mVPP59MHzTypCG=+10,VO=200mVPP23MHzTypCGain-Bandw