IPA1751

IPA1751_15 AD | Alldatasheet

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Technical content

.~ - . -..ANALOG W DEVICES InductosynTMPreamplifier and Power Oscillator

FEATURES

Encapsulated for Protection Phase Shift <5° Phase Match >1° Load Capacity 10,OOOpF OSC1754 IsolatedOutput Multi-Tapped Quadrature Reference Output

APPLICATIONS

The IPA1751 and OSC1754 when used with one of the IRDC1730 series Inductosyn/resolver-to-digitalconver- ters offersthe user allthe electronicmodules neces- sary for the Inductosyn to controllerinterface. GENERAL DESCRIPTION IPA1751 The output signalsfrom an Inductosynsliderareata low level of the ordermillivoltsand requiresamplificationand buffering beforetransmissionto an Inductosynto digitalconverter.The IPA1751 providesthe necessarygainand output impedance for thispurpose. Any gain mismatch in the two channelsamplifyingthesineand cosineoutputsof the Inductosynslidercontributesto thesystem error.The IPA1751 with a 0.15% gainmatch overthetemperature range only contributesan errorof0.23 micron usinga 2mm pitchInductosyn.By carefullycontrollingphase mismatch to lessthan 1°the errorcontributionisonly 0.2 micron in a 2mm pitchInductosyn. The IPA1751 with an output resistanceof lessthan 3 ohms and a capabilityofdrivinga cablecapacityof 1O,OOOpF istotally suitedtomachine toolapplicationwhere the Inductosynto digitalconverterisremote from the measuring Inductosyn. Inductosyn isa registeredtrademark of Farrand Industries,Inc. Information furnished by Analog Devices is believed to be accurate and reliable.However, no responsibilityis assumed by Analog Devices for itsuse; nor for any infringements of patents or other rightsof third parties which may resultfrom itsuse. No license isgranted by implica- tion or otherwise under any patent or patent rightsof Analog Devices. ---- OSC1754 The OSC1754 providesthedriveforenergizationoftheInductosyn track.Transformer isolatedoutputsareavailableatfourvoltages thatallowsa wide range of trackresistanceto be accommodated. In additionto thepower output,a two low power outputsare providedone inphase and one 90° in advance of thepower output.The necessityfora quadratureoutput isforthe reference inputof the IRDC, sinceInductosyntrackimpedance ispredo- minantlyresistive,the slidersineand cosineoutput voltagesare in phase quadraturewith the voltage. The demands on the absoluteaccuracyof thephase,frequency and amplitudearenot exactingowing tothemethod ofconversion used in the IRDC thatistolerantto alltheseparameters(see IRDCI730/31/33 Data Sheets). MODELS AVAILABLE Model IPA1751/560 isa two channelpreamplifier1kHz to 10kHz operating0 to + 70°c. Model OSC1754/S00 isa power oscillatorat 10kHz operating0 to + 70°c. Tel: 617/3294700 Twx: 710/394-6577 Telex:924491 Cables:ANALOG NORWOODMASS - ~ OBSOLETE

. - SPEeIFieATIONS(typical@+25OC overfullrangeofpowersupplyinputsunlessotherwisenoted) Model GAIN GAIN MISMATCH Channel toChannel Over Temperature Range PHASE SHIFT PHASE MISMATCH Channel toChannel CROSSTALK OPERATING FREQUENCY INPUT RESISTANCE OUTPUT RESISTANCE MAX LOAD CAPACITY MAXIMUM SIGNAL OUTPUT LEVEL POWER SUPPLIES Voltage Current TEMPERATURE RANGE Operating IPA1751/560 1300 :t10% HYBRID INDUCTOSYN PREAMPLIFIER AND POWER OSCILLATOR The IPAI764 and OSC1758 areextended temperaturedevices (- 55°C to + 115°C)with performance similarto the IPAI751 and OSCI754 describedin thisdata sheet.U.S. MIL-STD-883B processingisavailableon theseproducts. These productsarehoused in a hermeticallysealed18-pindouble (5.1mm). :t0.15% (equivalent to2.sarcmins) <S° <1° <0.1% OTHER PRODUCTS We manufacture a range of Inductosyniresolver-t<Kligitaicon- vertersspecificallydesignedforthe numericalcontrolledmachine tooland robotapplications. IRDC1730 - 12-bitparallelbinaryoutput with analogvelocity output,directionand ripplecarrylogicoutputs.Tracking rate up to 170 revolutionsper second. IRDC1731 - A serialoutput converterwith 4,000 countsper revolution,directionand ripplecarryoutput.Tracking rateup to 100 revolutions/pitchesper second. IRDC1732 -A low costhybrid.Twelve-bitparalleltri-state latchedbinaryoutput. 10kHz 5kO:t 10% <so 1O,000pF 3Vrms :t12V to :t15V 30mA max 0 to + 70°C - 55°C to + 115°C IRDC1733 -With the featuresof the IRDC1730 without analog velocityand ata reduced cost. In additionto thisabove range,we manufacture a complete rangeof modular and hybrid synchro/resolver-to-digitaland digital-to-synchro/resolverconverters. SIZE 2.0"x 2.0"x 0.4" (50.8mm x 50.8mm x 10.2mm) NOTE Specificationssubjecttochangewithoutnotice. OUTLINE DIMENSIONS Dimensionsshown ininchesand (mm). --1 '4 0<0.02 110.21 0.020 +0001 BRASS GOLD PLATED ABSOLUTE MAXIMUM VALUES Sin&CosI/P :tV +VPin +17V -V Pin -17V Sin&CosO/PlkLoad :tIOV IndefiniteShortCircuitProof L~L 175 0<0.025 12.51 -va T 200 0<0.02 OV 0 . (50.81+Vo 5 x 0.2 COSOIPO 15 x 5.1) SIGGNDO SIN OIP a 0.17514.41 -'- I }'f 0+ =w 1.2 (30.41 IPA1751

0.2151 SIN liP

• 0+0.2(51 OPTION T TOP VIEW -2- -- - OBSOLETE

~ /" S PEe IFie ATION S (typical@ +25OCwithj:15Vsuppliesunlessotherwisenoted) 10kHz :!:5% Comments and Conditions Over Temperature Range Model FREQUENCY OUTPUTS OSC1754/500 ISOLATED POWERO/P 20V rms 15Vrms lOV rms 5V rms 2.5Vrms@4mAmaxin PhasewithPower Outputs 2.5Vrms@4mAmax90° PhaseAdvanced WR T Power Outputs + 12V to+ 15V 100mA max 500mA max -12to -IS 20mA max

5 Watts

With + V = :!:15V AllOutput Meet:!:5% ToleranceOver Temperature Range FullyLoaded. Additional7% max Change No Load toFullLoad. N.B. AllOutputs Vary Proportionalto + V Supply REFERENCE 1 REFERENCE 2 POWER SUPPLY No Load FullLoad IndependentofLoad TEMPERATURE RANGE Operating Storage SIZE Oto + 70°C - 55°C to + 125°C 3.125"x 2.625"x 1" (79.4mm x 66.7mm x 25.4mm),---- 80z 224g WEIGHT NOTE Specificationssubjecttochangewithoutnotice, OUTLINE DIMENSIONS Dimensions shown in inches and (rom). -.L T 1.00 (25.4) ABSOLUTE MAXIMUM VALUES +VPin +18V -V Pin -18V ~5.1IMIN 0.2 r--:15.11--1~ 0'~.~2~.001 DIA BRASS GOLD PLATED 2.625 (66.7) 2.20 (55.4) -3- '-- I ON/C T150 4xO.2OUTPUT 10 0 (5.11 1.60 COMO(40.6) t t""..- (79.4) 0 REF1 1.80 (45.8)

0 REF2

5xO.2 0 REF COM (5X5.11 O+V OSC1754 OGND 0 -v N/CO T TOP VIEW OBSOLETE

APPLICATION OF OSC1754 AND IPA1751 The diagram below shows a "hookup" with thepreamplifier power oscillatorand an IRDCI733 with an Inductosyn.Precise applicationinformationisnot possibleas the Inductosynin its applicationhas many variables. Current Set Resistor This resistorisused to match the voltageoutput of the oscillator totheInductosyntrackresistanceand providethemanufacturer's recommended current.By variationof the voltageoutputsand currentresistance,trackby thisup toapproximately30 feet(9.1 meters)can be accommodated. Decoupling The preamplifierand oscillatorhave internalhigh frequency decouplingcapacitorson the supply lines,however, itisrecom- mended thatelectrolyticdecouplingcapacitorsareconnected closeto themodule pins. CURRENT SET RESISTOR Channel Gains There areseveralways toachievea signalvalueof 2.5V rms at the converterinput.When settinggainsitisimportantthatthe 2.5V rms signalisthe maximum ineitherchannel. Within thelimitssetby noise,sliderexactationcan be varied.A usefulfeatureofthe trackingconverterisitsabilityto reject incoherentand common mode noise. As theinputimpedance of the IRDC isresistive,the gain can be scaledby theadditionof seriesresistors.The requiredvalue is2.22kf1per excessvolt,the mismatch being more important than the absolutevalue.A mismatch of 0.1% in the valuesgives risetoan errorof0.0000787 of the Inductosynpitch. M ;:;;: c:!, N cJ, u SECTIONS OF INDUCTOSYN TRACK IN SERIES TYPICALLY 250mA 000 0 :!E OSC1754 :!E 0...N U- UJ UJ UJ a: a: a: c > z >+ C) I 000 COS liP SIN liP cz IPA1751 Q. c-- z

0 C)C en

Z>O~ I C)+uen 0 0 0 z ii5 INDUCTOSYN SLIDER SIG COM COS DIR R.C. SIN 120 110 IRDC1733 100

0 BUSY

0 INHIBIT

(MSB) 1 0 <{ r.t: Use of IRDC1733 with Inductosyn Preamplifier IPA 1751 and Power OscillatorOSC1754 ::J z cu.t-Z a:a.ORDERING INFORMATION IPA 1751/560Preamplifier0 to + 70°C OSCI754/500 Oscillator10kHz, 0 to + 70°C -4- - ---- OBSOLETE