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PA95 Datasheet(PDF) 4 Page - Cirrus Logic |
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PA95 Datasheet(HTML) 4 Page - Cirrus Logic |
4 / 6 page PA95 4 PA95U P r o d u c t I n n o v a t i o n F r o m ® TYPICAL APPLICATION Piezopositioningmaybeappliedtothefocusingofseg- mented mirror systems. The composite mirror may be composedofhundredsofelements,eachrequiringfocus- ingundercomputercontrol.Insuchcomplexsystemsthe PA95 reduces the costs of power supplies and cooling withitsadvantagesoflowcostandlowquiescentpower consumptionwhileincreasingcircuitdensitywiththeSIP package. PHASE COMPENSATION C Cratedforfullsupplyvoltage. GAIN C C ≥100 4.7pF GENERAL PleasereadApplicationNote1"GeneralOperatingConsiderations"whichcoversstability,supplies,heatsinking, mounting,currentlimit,SOAinterpretation,andspecificationinterpretation.Visitwww.cirrus.comfordesigntools thathelpautomatetaskssuchascalculationsforstability,internalpowerdissipation,currentlimit;heatsinkselec- tion;ApexPrecisionPower’scompleteApplicationNoteslibrary;TechnicalSeminarWorkbook;andEvaluationKits. CURRENT LIMIT Forproperoperation,thecurrentlimitresistor(R LIM)mustbeconnectedasshownintheexternalconnectiondia- gram.Theminimumvalueis3.5ohm,howeverforoptimumreliabilitytheresistorvalueshouldbesetashighas possible.Thevalueiscalculatedasfollows;withthemaximumpracticalvalueof150ohms. .7 R LIM= I LIM COMMON MODE INPUT RANGE Operationalamplifiersareusuallydesignedtohaveacommonmodeinputvoltagerangethatapproximatesthe powersupplyvoltagerange.However,tokeepthecostaslowaspossibleandstillmeettherequirementsofmost applicationsthecommonmodeinputvoltagerangeofthePA95isrestricted.Theinputpinsmustalwaysbealeast 30Vfromeithersupplyvoltagebutnevermorethan500V.ThismeansthatthePA95cannotbeusedinapplications wherethesupplyvoltagesareextremelyunbalanced.Forexample,supplyvoltagesof+800Vand–100Vwouldnot beallowedinanapplicationwherethenon-invertingpinisgroundedbecauseinnormaloperationbothinputpins wouldbeat0Vandthedifferencevoltagebetweenthepositivesupplyandtheinputpinswouldbe800V.Inthis kindofapplication,however,supplyvoltages+500Vand-100Vdoesmeettheinputcommonmodevoltagerange 0 25 50 75 100 125 150 TEMPERATURE, T (°C) 0 5 15 20 POWER DERATING 10 100 10K 1M FREQUENCY, F (Hz) OUTPUT CURRENT, I O (mA) OUTPUT VOLTAGE SWING 3 10 20 100 CURRENT LIMIT RESISTOR, R CL (Ω) 10 30 200 CURRENT LIMIT 50 70 5 50 20 INPUT NOISE 1K 2 7 10 20 3 5 15 10 30 25 120 100 150 T = T C T = T A SAFE OPERATING AREA SUPPLY TO OUTPUT DIFFERENTIAL, V S –VO (V) 50 50 5 10 15 25 DC, T C = 125°C DC, T C = 85°C 200mS PULSE CURVES @ 10% DUTY CYCLE MAX DC, T C = 25°C 100mS 100 100 150 200 250 500 1K 1M 2M 3M 4M 5M FREQUENCY, F (Hz) -90 -135 -180 -225 -270 -315 -360 PHASE RESPONSE C C = 4.7pF 100K 300K FREQUENCY, F (Hz) 50 1K 500 POWER RESPONSE 100 10K C C = 4.7pF 200 0 200 600 800 1000 TOTAL SUPPLY VOLTAGE, V S (V) 1.08 1.04 1.00 .96 .92 .88 QUIESCENT CURRENT 400 FREQUENCY, F (Hz) SMALL SIGNAL RESPONSE 0 60 120 20 40 80 100 100 1K 10K 100K 1M 10M 10 C C = 4.7pF 0 100 4 8 24 40 16 32 20 60 40 T C= 25°C TC = –55°C T C = 85°C 80 F R PA95 IN R PIEZO DRIVE S –V S +V OUT V COMPUTER FOCUS COMMAND VOLTAGE CL R 1 2 10 8 7 12 |
Similar Part No. - PA95_10 |
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Similar Description - PA95_10 |
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