PA92
PA92U 1
Product
Technology
F r o m
PA92
FEATURES
♦ HIGHVOLTAGE—400V(±200V)
♦ LOWQUIESCENTCURRENT—10mA
♦ HIGHOUTPUTCURRENT—4A
♦ PROGRAMMABLECURRENTLIMIT
APPLICATIONS
♦ PIEZOELECTRICPOSITIONING
♦ HIGHVOLTAGEINSTRUMENTATION
♦ ELECTROSTATICTRANSDUCERS
♦ PROGRAMMABLEPOWERSUPPLIESUP
TO390V
Q1 Q2
R1 R2 C1 R3
Q3
CC1
12
11
1
4
5
9
6
10
2
7
8
CC2
3
Q6
Q5
R5
R8 R9
Q15
R11 R12
Q16
Q12
Q8
R4
R7
Q4
ILIM
OUT
Q17
R10
Q13
Q11
+VS
–IN
+IN
–VS
IQ
R6
Q14BQ14A
High Voltage Power Operational Amplifiers
PA92
Product Innovation From
DESCRIPTION
The PA92 is a high voltage, low quiescent current
MOSFEToperationalamplierdesignedasalowcost
solutionfordrivingcontinuousoutputcurrentsupto4A
andpulsecurrentsupto7A.Thesafeoperatingarea
(SOA)hasnosecondbreakdownlimitationsandcan
beobservedforalltypeloadsbychoosinganappropri-
atecurrentlimitingresistor.TheMOSFEToutputstage
isbiasedABforlinearoperation.Externalcompensa-
tionprovidesexibilityinchoosingbandwidthandslew
ratefortheapplication.ApexPrecisionPower’sPower
SIPpackageusesaminimumofboardspaceallowing
forhighdensitycircuitboards.ThePowerSIPpackage
iselectricallyisolated.
EQUIVALENT SCHEMATIC
Copyright © Cirrus Logic, Inc. 2011
(All Rights Reserved)
www.cirrus.com
JAN 2011
APEX − PA92UREVM
1 2 3 4 5 6 7 8 9 10
–IN +IN
RCL
+Vs
–Vs
TO LOAD
AND FEEDBACK
11 12
RcCc
*
*
(See text.)
* Bypassing required.
IQ
PATENTED
12-pin SIP
PACKAGE
STYLE DP
Formedleadsavailable
SeepackagestyleEE
EXTERNAL CONNECTIONS
PA92
2 PA92U
Product
Technology
F r o m
CAUTION ThePA92isconstructedfromMOSFETtransistors.ESDhandlingproceduresmustbeobserved.
Theexposedsubstratecontainsberyllia(BeO).Donotcrush,machine,orsubjecttotemperatures
inexcessof850°Ctoavoidgeneratingtoxicfumes.
Parameter Test Conditions Min Typ Max Units
INPUT
OFFSETVOLTAGE,initial 2 10 mV
OFFSETVOLTAGEvs.temperature Fulltemperaturerange 15 50 µV/°C
OFFSETVOLTAGEvs.supply 10 25 µV/V
OFFSETVOLTAGEvs.time 75 µV/kh
BIASCURRENT,initial 200 2000 pA
BIASCURRENTvs.supply 4 pA/V
OFFSETCURRENT,initial 50 500 pA
INPUTIMPEDANCE,DC 1011 Ω
INPUTCAPACITANCE 4 pF
COMMONMODEVOLTAGERANGE
(Note3)
±VSŦ15 V
COMMONMODEREJECTION,DC VCM=±90V 80 98 dB
NOISE 100KHzbandwidth,
RS=1KΩ,CC=10pF
1 µVRMS
GAIN
OPENLOOP@15Hz RL=2KΩ,CC=10pF 94 111 dB
GAINBANDWIDTHPRODUCT@1MHz RL=2KΩ,CC=10pF 18 MHz
POWERBANDWIDTH RL=2KΩ,CC=10pF 30 kHz
PHASEMARGIN Fulltemperaturerange 60 °
OUTPUT
VOLTAGESWING(Note3) IO=4A ±VSŦ12 ±VSŦ10 V
CURRENT,continuous 4 A
SLEWRATE,AV=100 CC=10pF 50 V/µS
CAPACITIVELOAD,AV=+1 Fulltemperaturerange 1 nF
CHARACTERISTICS AND SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Min Max Units
SUPPLYVOLTAGE,+VSto-VS400 V
OUTPUTCURRENT,source, sink, peak,withinSOA 7 A
POWERDISSIPATION,continuous @ TC = 25°C 80 W
INPUTVOLTAGE,differential -20 20 V
INPUTVOLTAGE,commonmode -VSVSV
TEMPERATURE,pinsolder,10smax. 260 °C
TEMPERATURE,junction(Note2) 150 °C
TEMPERATURERANGE,storage −40 85 °C
OPERATINGTEMPERATURERANGE,case −25 85 °C
SPECIFICATIONS
PA92
PA92U 3
Product
Technology
F r o m
NOTES: 1. (AllMin/MaxcharacteristicsandspecicationsareguaranteedovertheSpeciedOperatingCondi-
tions.Typicalperformancecharacteristicsandspecicationsarederivedfrommeasurementstaken
attypicalsupplyvoltagesandTC=25°C).
2. Longtermoperationatthemaximumjunctiontemperaturewillresultinreducedproductlife.Derate
powerdissipationtoachievehighMTTF.
3. +VSand–VSdenotethepositiveandnegativepowersupplyrailrespectively.
4. Ratingappliesiftheoutputcurrentalternatesbetweenbothoutputtransistorsataratefasterthan
60Hz.
5. Deratemaxsupplyrating0.625V/°Cbelow25°Ccase.Noderatingneededabove25°Ccase.
TYPICAL PERFORMANCE GRAPHS
Parameter Test Conditions Min Typ Max Units
SETTLINGTIMEto0.1% CC=10pF,2Vstep 1 µS
RESISTANCE,noload 10 Ω
POWER SUPPLY
VOLTAGE(Note5) ±50 ±150 ±200 V
CURRENT,quiescent 10 14 mA
THERMAL
RESISTANCE,AC,junctiontocase
(Note4)
Fulltemprange,F>60Hz 1 °C/W
RESISTANCE,DC,junctiontocase Fulltemprange,F<60Hz 1.5 °C/W
RESISTANCE,junctiontoair Fulltemprange 30 °C/W
TEMPERATURERANGE,case Meetsfullrangespecications -25 +85 °C
HARMONIC DISTORTION
100 1K 10K
100k
FREQUENCY F (Hz)
135
90
PHASE RESPONSE
PHASE, Ф (°)
10 100 10K 100K
FREQUENCY, F (Hz)
INPUT NOISE VOLTAGE, V (nV√Hz)
100K
FREQUENCY, F (Hz)
–10
0
30
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, A (dB)
10
20
40
50
0 3 4
OUTPUT CURRENT, I
O
(A)
8.0
OUTPUT VOLTAGE SWING
7.5
7.0
8.5
0.0 0.4 0.6 1.0 1.2
RESISTOR VALUE, R
CL
(Ω)
0
1
4
CURRENT LIMIT
CURRENT LIMIT, I
LIM
(A)
2
3
10
EXT. COMPENSATION CAPACITOR, C
C
(pF)
1
SLEW RATE
SLEW RATE, (V/μS)
6
4
3
2
100 300
FREQUENCY, F (Hz)
DISTORTION, (%)
25 50 100
CASE TEMPERATURE, T
C
(°C)
1.2
NORMALIZED QUIESCENT CURRENT
NORMALIZED QUIESCENT CURRENT, I
Q
(X)
1.0
0.2 0.8
INPUT NOISE VOLTAGE
1K
2
7
10
20
5
3
15
1
VOLTAGE DROP FROM SUPPLY, V
S
– V
O
(V)
225
75
.001
1M 10M
270
180
125
1.4
1.6
2
6.5
60
30
20
10
8
40
30
.01
.1
1M 10M
C
C
= 150pF
C
C
= 100pF
C
C
= 47pF
C
C
= 10pF
C
C
= 150pF
C
C
= 100pF
C
C
= 47pF
C
C
= 10pF
0 25 50 75 100 125
CASE TEMPERATURE, T
C
(°C)
0
20
60
POWER DERATING
INTERNAL POWER DISSIPATION, P(W)
40
80
PO = 62W
PO = 20W
PO = 1W
POWER RESPONSE
FREQUENCY, F (Hz)
OUTPUT VOLTAGE, V
O
(V
P-P
)
10K 100K 1M
10
100
400
C
C
= 10pF
C
C
= 47pF
C
C
= 100pF
C
C
= 150pF
1K
20060
PA92
4 PA92U
Product
Technology
F r o m
GENERAL
PleasereadApplicationNote1"GeneralOperatingConsiderations"whichcoversstability,supplies,heatsinking,
mounting,currentlimit,SOAinterpretation,andspecicationinterpretation.Visitwww.cirrus.comfordesigntools
thathelpautomatetaskssuchascalculationsforstability,internalpowerdissipation,currentlimit;heatsinkselec-
tion;ApexPrecisionPower’scompleteApplicationNoteslibrary;TechnicalSeminarWorkbook;andEvaluationKits.
CURRENT LIMIT
Forproperoperation,thecurrentlimitresistor(RCL)must
be connected as shown in the external connection dia-
gram.Foroptimumreliabilitytheresistorvalueshouldbe
set as high as possible. The value is calculated as fol-
lows;withthemaximumpracticalvalueof16ohms.
.65
RCL=
ILIM
SAFE OPERATING AREA (SOA)
TheMOSFEToutputstageofthispoweroperationalam-
plierhastwodistinctlimitations:
1. ThecurrenthandlingcapabilityoftheMOSFETgeom-
etryandthewirebonds.
2. ThejunctiontemperatureoftheoutputMOSFETs.
NOTE: The output stage is protected against transient
yback. However, for protection against sustained, high
energy yback, external fast-recovery diodes should be
used.
SUPPLY TO OUTPUT DIFFERENTIAL, VS –VO (V)
10 20 30 40 80 100 200 300 500
OUTPUT CURRENT FROM +VS OR –VS, (A)
.04
.2
.1
.08
.06
.3
.8
.6
.4
1
2
4
8
6
T
C
= 125C
TC = 85C
100mS
60
200mS
DC, TC = 25C
SOA
HARMONIC DISTORTION
100 1K 10K
100k
FREQUENCY F (Hz)
135
90
PHASE RESPONSE
PHASE, Ф (°)
10 100 10K 100K
FREQUENCY, F (Hz)
INPUT NOISE VOLTAGE, V (nV√Hz)
100K
FREQUENCY, F (Hz)
–10
0
30
SMALL SIGNAL RESPONSE
OPEN LOOP GAIN, A (dB)
10
20
40
50
0 3 4
OUTPUT CURRENT, I
O
(A)
8.0
OUTPUT VOLTAGE SWING
7.5
7.0
8.5
0.0 0.4 0.6 1.0 1.2
RESISTOR VALUE, R
CL
(Ω)
0
1
4
CURRENT LIMIT
CURRENT LIMIT, I
LIM
(A)
2
3
10
EXT. COMPENSATION CAPACITOR, C
C
(pF)
1
SLEW RATE
SLEW RATE, (V/μS)
6
4
3
2
100 300
FREQUENCY, F (Hz)
DISTORTION, (%)
25 50 100
CASE TEMPERATURE, T
C
(°C)
1.2
NORMALIZED QUIESCENT CURRENT
NORMALIZED QUIESCENT CURRENT, I
Q
(X)
1.0
0.2 0.8
INPUT NOISE VOLTAGE
1K
2
7
10
20
5
3
15
1
VOLTAGE DROP FROM SUPPLY, V
S
– V
O
(V)
225
75
.001
1M 10M
270
180
125
1.4
1.6
2
6.5
60
30
20
10
8
40
30
.01
.1
1M 10M
C
C
= 150pF
C
C
= 100pF
C
C
= 47pF
C
C
= 10pF
C
C
= 150pF
C
C
= 100pF
C
C
= 47pF
C
C
= 10pF
0 25 50 75 100 125
CASE TEMPERATURE, T
C
(°C)
0
20
60
POWER DERATING
INTERNAL POWER DISSIPATION, P(W)
40
80
PO = 62W
PO = 20W
PO = 1W
POWER RESPONSE
FREQUENCY, F (Hz)
OUTPUT VOLTAGE, V
O
(V
P-P
)
10K 100K 1M
10
100
400
C
C
= 10pF
C
C
= 47pF
C
C
= 100pF
C
C
= 150pF
1K
20060
PHASE COMPENSATION
GAIN CC* RC
≥1 150pF 100Ω
≥2 100pF 100Ω
≥3 47pF 0Ω
≥12 10pF 0Ω
*CCNevertobe<10pF.CCtoberatedforthefullsupply
voltage+Vto-Vs.UseceramicNPO(COG)type.
PA92
PA92U 5
Product
Technology
F r o m
SAFE OPERATING CURVES
Thesafeoperatingareacurvesdenethemaximumadditionalinternalpowerdissipationtheampliercantolerate
whenitproducesthenecessaryoutputtodriveanexternalload.
INPUT PROTECTION
Although the PA92 can withstand differential voltages up to ±20V, ad-
ditionalexternalprotectionisrecommended.Lowleakage,lowcapaci-
tanceJFETsconnectedasdiodesarerecommended(e.g.2N4416,Q1-
Q4inFigure2).Thedifferentialinputvoltagewillbeclampedto±1.4V.
Thisissufcientoverdrivetoproducemaximumpowerbandwidth.
POWER SUPPLY PROTECTION
Unidirectionalzenerdiodetransientsuppressorsarerecommendedas
protectiononthesupplypins.SeeFigure2.Thezenersclamptransients
tovoltageswithinthepowersupplyratingandalsoclamppowersupply
reversals to ground. Whether the zeners are used or not, the system
power supply should be evaluated for transient performance including
power-onovershootandpower-offpolarityreversalsaswellaslineregulation.
Conditionswhichcancauseopencircuitsorpolarityreversalsoneitherpowersupplyrailshouldbeavoidedorpro-
tectedagainst.Reversalsoropensonthenegativesupplyrailisknowntoinduceinputstagefailure.Unidirectional
transzorbspreventthis,anditisdesirablethattheybebothelectricallyandphysicallyasclosetotheamplieras
possible.
STABILITY
ThePA92isexternallycompensatedandperformancecanbetailoredtotheapplication.Usethegraphsofsmall
signalresponseandpowerresponseasaguide.ThecompensationcapacitorCCmustberatedat500Vworking
voltage.AnNPOcapacitorisrecommended.ThecompensationnetworkCCRCmustbemountedcloselytotheam-
plierpins4and5toavoidspuriousoscillation.
QUIESCENT CURRENT REDUCTION
Whenpin3(IQ)isshortedtopin5(CC2)theABbiasingoftheoutputstageisdisabled.Thislowersquiescentpower
butalsoraisesdistortionsincetheoutputstageisthenclassCbiased.Theoutputstagebiascurrentisnominally
setat1mA.Pin3maybeleftopenifnotused.
+VS
–IN
+IN
Z1
Z2
11, 12
7, 8
1
2
6
PA90
Q1
Q2
–VS
Q3
Q4
FIGURE 2.
OVERVOLTAGE
PROTECTION
PA92
6 PA92U
Product
Technology
F r o m
CONTACTING CIRRUS LOGIC SUPPORT
ForallApexPrecisionPowerproductquestionsandinquiries,calltollfree800-546-2739inNorthAmerica.
Forinquiriesviaemail,pleasecontactapex.support@cirrus.com.
InternationalcustomerscanalsorequestsupportbycontactingtheirlocalCirrusLogicSalesRepresentative.
Tondtheonenearesttoyou,gotowww.cirrus.com
IMPORTANTNOTICE
CirrusLogic,Inc.anditssubsidiaries("Cirrus")believethattheinformationcontainedinthisdocumentisaccurateandreliable.However,theinformationissubject
tochangewithoutnoticeandisprovided"ASIS"withoutwarrantyofanykind(expressorimplied).Customersareadvisedtoobtainthelatestversionofrelevant
informationtoverify,beforeplacingorders,thatinformationbeingreliedoniscurrentandcomplete.Allproductsaresoldsubjecttothetermsandconditionsofsale
suppliedatthetimeoforderacknowledgment,includingthosepertainingtowarranty,indemnication,andlimitationofliability.NoresponsibilityisassumedbyCirrus
fortheuseofthisinformation,includinguseofthisinformationasthebasisformanufactureorsaleofanyitems,orforinfringementofpatentsorotherrightsofthird
parties.ThisdocumentisthepropertyofCirrusandbyfurnishingthisinformation,Cirrusgrantsnolicense,expressorimpliedunderanypatents,maskworkrights,
copyrights,trademarks,tradesecretsorotherintellectualpropertyrights.Cirrusownsthecopyrightsassociatedwiththeinformationcontainedhereinandgivescon-
sentforcopiestobemadeoftheinformationonlyforusewithinyourorganizationwithrespecttoCirrusintegratedcircuitsorotherproductsofCirrus.Thisconsent
doesnotextendtoothercopyingsuchascopyingforgeneraldistribution,advertisingorpromotionalpurposes,orforcreatinganyworkforresale.
CERTAINAPPLICATIONSUSINGSEMICONDUCTORPRODUCTSMAYINVOLVEPOTENTIALRISKSOFDEATH,PERSONALINJURY,ORSEVEREPROP-
ERTYORENVIRONMENTALDAMAGE(“CRITICALAPPLICATIONS”).CIRRUSPRODUCTSARENOTDESIGNED,AUTHORIZEDORWARRANTEDTOBE
SUITABLEFORUSEINPRODUCTSSURGICALLYIMPLANTEDINTOTHEBODY,AUTOMOTIVESAFETYORSECURITYDEVICES,LIFESUPPORTPROD-
UCTSOROTHERCRITICALAPPLICATIONS.INCLUSIONOFCIRRUSPRODUCTSINSUCHAPPLICATIONSISUNDERSTOODTOBEFULLYATTHECUS-
TOMER’SRISKANDCIRRUSDISCLAIMSANDMAKESNOWARRANTY,EXPRESS,STATUTORYORIMPLIED,INCLUDINGTHEIMPLIEDWARRANTIESOF
MERCHANTABILITYANDFITNESSFORPARTICULARPURPOSE,WITHREGARDTOANYCIRRUSPRODUCTTHATISUSEDINSUCHAMANNER.IFTHE
CUSTOMERORCUSTOMER’SCUSTOMERUSESORPERMITSTHEUSEOFCIRRUSPRODUCTSINCRITICALAPPLICATIONS,CUSTOMERAGREES,
BYSUCHUSE,TOFULLYINDEMNIFYCIRRUS,ITSOFFICERS,DIRECTORS,EMPLOYEES,DISTRIBUTORSANDOTHERAGENTSFROMANYANDALL
LIABILITY,INCLUDINGATTORNEYS’FEESANDCOSTS,THATMAYRESULTFROMORARISEINCONNECTIONWITHTHESEUSES.
CirrusLogic,Cirrus,andtheCirrusLogiclogodesigns,ApexPrecisionPower,ApexandtheApexPrecisionPowerlogodesignsaretrademarksofCirrusLogic,Inc.
Allotherbrandandproductnamesinthisdocumentmaybetrademarksorservicemarksoftheirrespectiveowners.