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| (R) ct Inn P r o d uPA91o v a t i o n F r o m PA91 PA91 DESCRIPTION The PA91 is a high voltage, low quiescent current MOSFEToperationalamplifierdesignedasalowcost solution for driving continuous output currents up to 200mAandpulsecurrentsupto350mA.Thesafeoperatingarea(SOA)hasnosecondbreakdownlimitations and can be observed for all type loads by choosing anappropriatecurrentlimitingresistor.TheMOSFET output stage is biasedAB for linear operation. Externalcompensationprovidesflexibilityinchoosingbandwidthandslewratefortheapplication.ApexPrecision Power'sPowerSIPpackageusesaminimumofboard spaceallowingforhighdensitycircuitboards.The12pinPowerSIPpackageiselectricallyisolated. High Voltage Power Operational Amplifiers FEATURES HIGHVOLTAGE--450V(225V) LOWQUIESCENTCURRENT--10mA HIGHOUTPUTCURRENT--200mA PROGRAMMABLECURRENTLIMIT HIGHSLEWRATE--300V/s APPLICATIONS PIEZOELECTRICPOSITIONING HIGHVOLTAGEINSTRUMENTATION ELECTROSTATICTRANSDUCERS PROGRAMMABLEPOWERSUPPLIESUP TO440V 12 11 +VS EQUIVALENT SCHEMATIC R1 R2 C1 R3 Q1 Q6 Q5 Q14A 1 -IN R5 R8 2 +IN Q15 R11 Q2 5 CC2 Q3 R4 Q4 ILIM 9 4 CC1 Q14B R6 R9 Q8 Q11 R7 10 6 OUT Q12 3 IQ Q16 Q13 R10 Q17 -VS 7 8 R12 EXTERNAL CONNECTIONS 1 2 3 Rc -IN +IN 4 5 Cc RCL 6 7 8 9 10 11 12 * IQ TO LOAD AND FEEDBACK -Vs +Vs * Formedleadsavailable SeepackagestyleEE 12-pin SIP PACKAGE STYLE DP (See text.) * Bypassing required. Copyright (c) Cirrus Logic, Inc. 2010 (All Rights Reserved) PA91U www.cirrus.com MAR 2010 1 APEX - PA91UREVI PA91 (R) Product Innovation From 1. CHARACTERISTICS AND SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Parameter SUPPLYVOLTAGE,+VSto-VS OUTPUTCURRENT,source,sink,peak,withinSOA POWERDISSIPATION,continuous@TC=25C INPUTVOLTAGE,differential INPUTVOLTAGE,commonmode TEMPERATURE,pinsolder,10smax. TEMPERATURE,junction(Note2) TEMPERATURERANGE,storage OPERATINGTEMPERATURE,case -40 -25 -20 -VS Symbol Min Max 450 350 30 20 VS 260 150 85 85 Units V mA W V V C C C C CAUTION SPECIFICATIONS INPUT OFFSETVOLTAGE,initial ThePA91isconstructedfromMOSFETtransistors.ESDhandlingproceduresmustbeobserved. Theexposedsubstratecontainsberyllia(BeO).Donotcrush,machine,orsubjecttotemperatures inexcessof850Ctoavoidgeneratingtoxicfumes. Test Conditions1 Min Typ 0.5 Fulltemperaturerange 15 10 75 200 4 50 1011 4 VS15 VCM=90V 100KHzbandwidth, RS=1K,CC=OPEN RL=2K,CC=OPEN RL=2K,CC=OPEN RL=2K,CC=OPEN Fulltemperaturerange VS12 200 CC=OPEN Fulltemperaturerange 240 470 300 94 80 98 1 500 2000 Parameter Max 2 50 25 Units mV V/C V/V V/KHz pA pA/V pA pF V dB VRMS OFFSETVOLTAGEvs.temperature OFFSETVOLTAGEvs.supply OFFSETVOLTAGEvs.time BIASCURRENT,initial BIASCURRENTvs.supply OFFSETCURRENT,initial INPUTIMPEDANCE,DC INPUTCAPACITANCE COMMONMODEVOLTAGERANGE (Note3) COMMONMODEREJECTION,DC NOISE GAIN OPENLOOP@15Hz GAINBANDWIDTHPRODUCT@1MHz POWERBANDWIDTH PHASEMARGIN OUTPUT 111 100 470 60 VS10 dB MHz KHz V mA V/S pF VOLTAGESWING(Note3) IO=200mA CURRENT,continuous SLEWRATE,AV=100 CAPACITIVELOAD,AV=+1 2 PA91U (R) Product Innovation From PA91 Test Conditions1 Min Typ 1 50 40 150 10 225 14 2.5 4.2 30 -25 +85 Parameter SETTLINGTIMEto0.1% RESISTANCE,noload POWER SUPPLY VOLTAGE(Note5) CURRENT,quiescent THERMAL Max Units S V mA C/W C/W C/W C CC=OPEN,2Vstep RESISTANCE,AC,junctiontocase(Note4) Fulltemprange,F>60Hz RESISTANCE,DC,junctiontocase RESISTANCE,junctiontoair TEMPERATURERANGE,case Fulltemprange,F<60Hz Fulltemprange Meetsfullrangespecifications NOTES: 1. (AllMin/MaxcharacteristicsandspecificationsareguaranteedovertheSpecifiedOperatingConditions.Typicalperformancecharacteristicsandspecificationsarederivedfrommeasurementstaken attypicalsupplyvoltagesandTC=25C). 2. Longtermoperationatthemaximumjunctiontemperaturewillresultinreducedproductlife.Derate powerdissipationtoachievehighMTTF. 3. +VSand-VSdenotethepositiveandnegativepowersupplyrailrespectively. 4. Ratingappliesiftheoutputcurrentalternatesbetweenbothoutputtransistorsataratefasterthan 60Hz. 5. Deratemaxsupplyrating0.625V/Cbelow25Ccase.Noderatingneededabove25Ccase. TYPICAL PERFORMANCE GRAPHS INTERNAL POWER DISSIPATION, P(W) 90 NORMALIZED QUIESCENT CURRENT, IQ (X) 40 32 24 16 8 0 POWER DERATING PHASE RESPONSE NORMALIZED QUIES. CURRENT 1.3 PHASE, () OUTPUT STAGE 135 1.2 180 CC = 68 pF CC = 10 pF CC = 4.7 pF CC = OPEN 1M 10M FREQUENCY F (Hz) 1.1 225 0 25 50 75 100 125 150 CASE TEMPERATURE, TC (C) 270 100k 1.0 25 50 100 75 125 CASE TEMPERATURE, TC (C) SMALL SIGNAL RESPONSE 50 OPEN LOOP GAIN, A (dB) VOLTAGE DROP FROM SUPPLY, VS - VO (V) 6 5.5 5 4.5 4 3.5 OUTPUT VOLTAGE SWING OUTPUT VOLTAGE, VO(VP-P) 500 400 300 POWER RESPONSE 40 30 20 10 CC= 200 CC= 68p F CC= N OPE F 4.7p CC= 10p F CC = 68 pF 0 CC = 10 pF CC = 4.7 pF -10 CC = OPEN 100K 1M 10M FREQUENCY, F (Hz) 0 0.1 .05 0.15 OUTPUT CURRENT, IO (A) 0.2 100 90 80 70 60 50 10K 100K 1M FREQUENCY, F (Hz) (V/S) N, (%) 300 200 RL = 1K VS = 200V AV = 63 .1 GE, V (nVHz) 1K 700 PA91U 500 SLEW RATE 1 HARMONIC DISTORTION 20 15 10 INPUT NOISE VOLTAGE 3 VOLTAGE DROP FROM SUPP OPEN LOOP GAIN, 5 4.5 4 (R) OUTPUT VOLTAGE 30 20 10 200 CC= F 68p =O CC= CC= F 10p PEN F 4.7p PA91 CC = 68 pF 0 CC = 10 pF CC = 4.7 pF -10 CC = OPEN 100K 1M 10M FREQUENCY, F (Hz) 3.5 Product Innovation From 0 0.1 .05 0.15 OUTPUT CURRENT, IO (A) 0.2 100 90 80 70 60 50 10K 100K 1M FREQUENCY, F (Hz) SLEW RATE, (V/S) DISTORTION, (%) 300 200 100 70 50 40 30 20 10 0.1 10 100 1 EXT. COMPENSATION CAPACITOR, CC (pF) RL = 1K VS = 200V AV = 63 .1 PO = 17.6W .01 PO = 1W PO = 5W INPUT NOISE VOLTAGE, V (nVHz) 1K 700 500 SLEW RATE 1 HARMONIC DISTORTION 20 15 10 7 5 INPUT NOISE VOLTAGE 3 2 10 .001 10 100 1K 10K FREQUENCY, F (Hz) 100K 100 1K 10K FREQUENCY, F (Hz) 100K CURRENT LIMIT .2 CURRENT LIMIT, ILIM (A) .15 PHASE COMPENSATION GAIN 1 5 10 30 CC* 68pF 10pF 4.7pF NONE RC 100 100 0 0 .1 .05 0 *CCToberatedforthefullsupplyvoltage+VSto-VS. UseNPOceramic(COG)type. 0 8 12 24 4 16 20 RESISTOR VALUE, RCL () TYPICAL APPLICATION RF +VS LOW POWER, PIEZOELECTRIC POSITIONING Piezo positioning may be applied to the focusing of segmented mirror systems. The composite mirror may be composedofhundredsofelements,eachrequiringfocusingundercomputercontrol.Insuchcomplexsystemsthe PA91 reduces the costs of power supplies and cooling withitsadvantagesoflowcostandlowquiescentpower consumptionwhileincreasingcircuitdensitywiththeSIP package. R IN 1 11,12 PIEZO DRIVE PA91 6 V OUT 2 COMPUTER FOCUS COMMAND VOLTAGE 7,8 9,10 R CL GENERAL -V S PleasereadApplicationNote1"GeneralOperatingConsiderations"whichcoversstability,supplies,heatsinking, mounting,currentlimit,SOAinterpretation,andspecificationinterpretation.Visitwww.cirrus.comfordesigntools thathelpautomatetaskssuchascalculationsforstability,internalpowerdissipation,currentlimit;heatsinkselection;ApexPrecisionPower'scompleteApplicationNoteslibrary;TechnicalSeminarWorkbook;andEvaluationKits. CURRENT LIMIT Forproperoperation,thecurrentlimitresistor(RCL)mustbeconnectedasshownintheexternalconnectiondiagram.Foroptimumreliabilitytheresistorvalueshouldbesetashighaspossible.Thevalueiscalculatedasfollows; withthemaximumpracticalvalueof32ohms. .65 RCL= ILIM 4 PA91U (R) Product Innovation From PA91 SOA 500 300 200 SAFE OPERATING AREA (SOA) OUTPUT CURRENT FROM +VS OR -VS (mA) The MOSFET output stage of this power operational amplifierhastwodistinctlimitations: 1. ThecurrenthandlingcapabilityoftheMOSFETgeometryandthewirebonds. 2. ThejunctiontemperatureoftheoutputMOSFETs. NOTE:Theoutputstageisprotectedagainsttransient flyback.However,forprotectionagainstsustained,high energyflyback,externalfast-recoverydiodesshouldbe used. 20 0m S DC 10 0m S 100 ,T DC DC C = ,T 25 C = C SAFE OPERATING CURVES 85 50 30 20 ,T C The safe operating area curves define the maximum additional internal power dissipation the amplifier can toleratewhenitproducesthenecessaryoutputtodrive anexternalload. C = 12 5 C INPUT PROTECTION PULSE CURVES @ 10% DUTY CYCLE MAX. 10 Although the PA91 can withstand differential voltages 25 75 100 125 250 500 50 up to 20V, additional external protection is recomSUPPLY TO OUTPUT DIFFERENTIAL, VS - VO (V) mended. Low leakage, low capacitance JFETs connectedasdiodesarerecommended(e.g.2N4416,Q1-Q4inFigure +VS 2). The differential input voltage will be clamped to 1.4V. This is Z1 sufficientoverdrivetoproducemaximumpowerbandwidth. POWER SUPPLY PROTECTION Unidirectionalzenerdiodetransientsuppressorsarerecommended Q1 Q3 6 as protection on the supply pins. See Figure 2.The zeners clamp PA91 transientstovoltageswithinthepowersupplyratingandalsoclamp Q2 Q4 powersupplyreversalstoground.Whetherthezenersareusedor +IN 7, 8 2 not,thesystempowersupplyshouldbeevaluatedfortransientperformanceincludingpower-onovershootandpower-offpolarityreverZ2 FIGURE 2. salsaswellaslineregulation. OVERVOLTAGE -VS Conditions which can cause open circuits or polarity reversals on PROTECTION eitherpowersupplyrailshouldbeavoidedorprotectedagainst.Reversalsoropensonthenegativesupplyrailisknowntoinduceinputstagefailure.Unidirectionaltranszorbsprevent this,anditisdesirablethattheybebothelectricallyandphysicallyasclosetotheamplifieraspossible. -IN 1 11, 12 STABILITY ThePA91isexternallycompensatedandperformancecanbetailoredtotheapplication.Usethegraphsofsmall signalresponseandpowerresponseasaguide.ThecompensationcapacitorCCmustberatedat500Vworking voltage.AnNPOcapacitorisrecommended.ThecompensationnetworkCCRCmustbemountedcloselytothe amplifierpins4and5toavoidspuriousoscillation. QUIESCENT CURRENT REDUCTION Whenpin3(IQ)isshortedtopin5(CC2)theABbiasingoftheoutputstageisdisabled.Thisraisesdistortionsince theoutputstageisthenclassCbiased,butreducesthequiescentcurrentby1mAforapowerdissipationsavings of0.4W.Pin3maybeleftopenifnotused. PA91U 5 PA91 (R) Product Innovation From CONTACTING CIRRUS LOGIC SUPPORT ForallApexPrecisionPowerproductquestionsandinquiries,calltollfree800-546-2739inNorthAmerica. Forinquiriesviaemail,pleasecontactapex.support@cirrus.com. InternationalcustomerscanalsorequestsupportbycontactingtheirlocalCirrusLogicSalesRepresentative. Tofindtheonenearesttoyou,gotowww.cirrus.com IMPORTANTNOTICE CirrusLogic,Inc.anditssubsidiaries("Cirrus")believethattheinformationcontainedinthisdocumentisaccurateandreliable.However,theinformationissubject tochangewithoutnoticeandisprovided"ASIS"withoutwarrantyofanykind(expressorimplied).Customersareadvisedtoobtainthelatestversionofrelevant informationtoverify,beforeplacingorders,thatinformationbeingreliedoniscurrentandcomplete.Allproductsaresoldsubjecttothetermsandconditionsofsale suppliedatthetimeoforderacknowledgment,includingthosepertainingtowarranty,indemnification,andlimitationofliability.NoresponsibilityisassumedbyCirrus fortheuseofthisinformation,includinguseofthisinformationasthebasisformanufactureorsaleofanyitems,orforinfringementofpatentsorotherrightsofthird parties.ThisdocumentisthepropertyofCirrusandbyfurnishingthisinformation,Cirrusgrantsnolicense,expressorimpliedunderanypatents,maskworkrights, copyrights,trademarks,tradesecretsorotherintellectualpropertyrights.CirrusownsthecopyrightsassociatedwiththeinformationcontainedhereinandgivesconsentforcopiestobemadeoftheinformationonlyforusewithinyourorganizationwithrespecttoCirrusintegratedcircuitsorotherproductsofCirrus.Thisconsent doesnotextendtoothercopyingsuchascopyingforgeneraldistribution,advertisingorpromotionalpurposes,orforcreatinganyworkforresale. CERTAINAPPLICATIONSUSINGSEMICONDUCTORPRODUCTSMAYINVOLVEPOTENTIALRISKSOFDEATH,PERSONALINJURY,ORSEVEREPROPERTYORENVIRONMENTALDAMAGE("CRITICALAPPLICATIONS").CIRRUSPRODUCTSARENOTDESIGNED,AUTHORIZEDORWARRANTEDTOBE SUITABLEFORUSEINPRODUCTSSURGICALLYIMPLANTEDINTOTHEBODY,AUTOMOTIVESAFETYORSECURITYDEVICES,LIFESUPPORTPRODUCTSOROTHERCRITICALAPPLICATIONS.INCLUSIONOFCIRRUSPRODUCTSINSUCHAPPLICATIONSISUNDERSTOODTOBEFULLYATTHECUSTOMER'SRISKANDCIRRUSDISCLAIMSANDMAKESNOWARRANTY,EXPRESS,STATUTORYORIMPLIED,INCLUDINGTHEIMPLIEDWARRANTIESOF MERCHANTABILITYANDFITNESSFORPARTICULARPURPOSE,WITHREGARDTOANYCIRRUSPRODUCTTHATISUSEDINSUCHAMANNER.IFTHE CUSTOMERORCUSTOMER'SCUSTOMERUSESORPERMITSTHEUSEOFCIRRUSPRODUCTSINCRITICALAPPLICATIONS,CUSTOMERAGREES, BYSUCHUSE,TOFULLYINDEMNIFYCIRRUS,ITSOFFICERS,DIRECTORS,EMPLOYEES,DISTRIBUTORSANDOTHERAGENTSFROMANYANDALL LIABILITY,INCLUDINGATTORNEYS'FEESANDCOSTS,THATMAYRESULTFROMORARISEINCONNECTIONWITHTHESEUSES. CirrusLogic,Cirrus,andtheCirrusLogiclogodesigns,ApexPrecisionPower,ApexandtheApexPrecisionPowerlogodesignsaretrademarksofCirrusLogic,Inc. Allotherbrandandproductnamesinthisdocumentmaybetrademarksorservicemarksoftheirrespectiveowners. 6 PA91U |
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