DRC1745_15 AD | Alldatasheet
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ANALOGDEVICES fAX-ON-DEMAND HOTLINE - Page 111 ANALOG W DEVICES I HighPowerOutput" Hybrid Digital- to-Synchro/Resolver Converters DRC1M~DRC1746 I
FEATURES
2 or 4 Arc-Minutes Accuracy 2VA max Mean Output Drive Capability Full Accuracy for de to 2.6kHz Reference Full Accuracy with dc or Pulsating Power Supplies (PPS) Guaranteed Operation With 3V dc Pedestal on PPS Can Drive Pure Inductive, Resistive or Highly Capacitive Loads LS or CMOS Latched Inputs With Separate HighlLow Byte Enable Low Radius Vector Variation (0.03%) Optional TransZorb TMProtection Against Inductive Spikes on Output Protected Against +200% Overvoitage on Analog Input Remote Output Sensing Facility No Trims or External Adjustments Full Output Short Circuit Protection Single 4O-Pin Package Hi Rei, MIL-STDB83BVersions Available APPUCA TIONS Driving Synchro and Resolver Control Transformers Avionic Equipment (e.g., Air Data Computers) Interfacing With Servo Systems Fire Control System Outputs Naval Retransmission Unit Outputs Outputs to Radars and Navigational Aids Aircraft and Naval Simulators GENERAL DESCRIPTION The DRCl745 and DRC1746are hybrid packagedDigital-to- Resolverconverters.They accept a 14-bitor 16-bitdigital input word representingangleand output sine and cosinevoltages multipliedby an analoginput. The convertersmaintain full accuracywhen the analoginput frequencyis in the range dc to 2.6kHz. The units have internal power amplifiers capable of driving a 2VA load which can be pure inductive, resistive or highly capaci- tive. The output is fully short-circuit protected against overcurrenr. The output of the converter can be used to drive directly into resolver control tnmsformers or in conjunction with an external transformer module to drive synchro control transformers. The power available is more than adequate to drive aU standard synchro control transformers. The separately powered output stage is compatible with conven- tional :t 15V dc power supplies or pulsating'power supplies with pedestal components as low as 3V dc. TrausZorb ia a reJ:istercd trademark of General Semicoadui:tOr lDduatries, Inc. REV. A Information furnished by Analog Devices is believed to be accurate and reliable. However. no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. FUNCTIONAL BLOCK DIAGRAM ,-,sv +15VIP,-1SV A_, COS {2A SIN ",t COS "' SIN SENSE SIN 1M SIN ",t SIN "' SIG GNP cDS SENSE V"' A,o fA SIN ,.Ii ,sv IL OPTIONS ONLYI LBE HBE "'GITI" GNO -15VIP! INPUT (to' NOTE, "A",", "GNO", AND "SIG GND" ARE INTERNALLY cONNECTED IN STAR POINT. The useofpulsating power suppliesgreatly reduces the internal power dissipation in the hybrid package which in tUrn maximizes the converter's MeanTime BetWeen Failures (MTBF). A particular feature of the converters is that they have a remote sensing facility which means that output accuracy can be main- tained even when long lines have to be driven. The converter's data inputs are latched and the latches can be CMOS or Low Power Schottky (LS). The former gives advantages in terms of power dissipation and the latter in terms of glitch performance when used in fast dynamic update modes. The latches are transparent and have a separatehigh and low byte enable. As an option, the output stage can be fitted with internal Trans- Zorb TMprotection. This gives full protection against transient voltages generated by an inductive load in response to an abrupt change in load current. This condition can occur at switch off or as a consequence of external power supply fault conditions. The units are packaged in 4O-pin dual in line hybrid packages and require no external trims or adjustments. MODELS AVAILABLE The DRC1745 (14-bit resolution) and DRC1746 (l6-bit resolution) are available with accuracies of :!:2 or :t 4 arc-minUtes. Both units have optional TransZorb protection and a choice of either LS or CMOS inputs (see Ordering Information). Two sets of reference and output transformers are available. The STMl660/STM1663 operates over 47Hz to 440Hz while the STM1680/STM1683 operates over 360Hz to 2.6kHz. The transformers can be Scott T connected to provide a synchro oUtput format. One Technology Way, P,O, Box 9106, Norwood, MA 02062-9106. U.S.A. Tel: 617/329.4700 Fax: 617/326.8703 Twx; 710/394-6577 Telex: 924491 Cable: ANALOG NORWOODMASS OBSOLETE
ANALOGDEVICES fAX-ON-DEHAND HOTLINE - Page 11 ORC 1745/DRC1746- SPECIFICATIONS~~~~:s;n;::)oc and:t15Vpower supplies, unless NOTES Spocir"""l1 ,.bio<r 'a <Iwtac ..i, , ,i",. ABSOLUTE MAXIMUM INPUTS +15VtoGND ." +17V -15VtoGND ,... -17V +5VtoGND +5.5V,-O.3V -2- REV. A Itcfcn:ac:.I_' Output Tl'IUUIf-r TraaalonDCr M.ocIcIo DRC1745 ORC!1" Model STMI STMI68:J (O.Hare-minu,..) depcndins Of)option RECOMMENDED ANALOG INPUT 3AVnn. (.in&kcndedinput) AKhAU) SI,S2,S3,(S4) (V"",,)' 3.S3V nns(max) . OlITPUT FORMAT N/A Synebroorraolver OUTPUT WITH RECOMMENDED 6.SVnns ' d<pOO<ting on oprion ANALOG INPUT 1.01Vnm(max) . FREQUENCY RANGE STMI6S0 360H:o-2.6kHz GAINTEMPERATURE INPUT IMPEDANCECOEFFIClEh'T 2Sppmrc (mn) . I l.8VInput SOM}{min) N/A ANALOGINPUT(V.E") 26Vlnput 30i<0{min) NiA FREQlJENCYRANGE dcto2.6kR. . JIV Input 800kfl(min) N/A ANALOG INPUTIMPEDANCE IO.llefi . ACCURACY ANALOGOlITPUTIMPEDANCE O.2mOmax . O.IVA Load N/A '" LOue-min(max) L4VALoad NIA :r 2.0 arc-miD (max) OUTPUTOFFSETVOLTAGE 2SmV(max) . l.OVA Load NIA z3.0are-min(max) OUTPUTOFFSETVOLTAGE DRIFT 50,.VI'C(max) . Tcmperatun:Cocff>eicnlNIA '"O.Olarc-minrC(max) OUTPUTDRIVECAPABILITY 1.5VA(max_n) OUTPUTIMPEDANCE :t 300mA_kii<' IO.6Vpcsk . 11.8 V Output NiA 2.9f1(typ) PHASESHIFT(V.BFtoVO) O.OS'@IOOHz . 26V Output N/A 13.6(I(typ) !IOV Output N/A lS6fl(typ) RESPONSE TO A STEP INPUT ZOILS (mu) to within """u,,"e)' of c<>nvcn«. (28.5 x28.5x 1O.2mm) Any size digital...p input. ' VECTOR ACCURACY TEMPERATURE RANGE Radius Error ().()3% . Operating --S5"Cto+125"C -S5"Cto + 12S'C POWERSUPPLY (NO LOAD)"'" WEIGHT(mu)LSutcllOpti"", + ISVolt< ISmA(typ) 22mA(mu) . STMI680 1.5 oz (41 grams)- 15 Vol" ISmA(ryp)22mA(mu) . STMI683 1. So;z(70 grams)+ I5(P)Volts 20mA(ryp) 34mA(mox) . -15(P)VoIu 20mA(typ)34mA(max) . +5Volts 44mA (IYP) 12mA (max) . IOtA man, nol appi;abje. CMOSl.atcbOpti"", + 15Vol", 14mA (typ) 3OmA(ma:x) . -ISVol.. ISmA (typ) 22mA (max) . + IS(P)VoIl$ lOmA(typ)34mA(max) . -U(P) Volts 20mA(ryp)34mA(max) . Additional Current (lDad Dependent) + I5(P)Vol" 4OOmAPeak(max) . -15(P)VoIts 400mAPcak(max) . PULSATING POWER SUPPL Y PEDESTAL ]Vde(min) . POWERDISSIPATION SeePowerI)jssipo.tion scctin ofIhisdaluheet.. CASETEMPERATURE RANGE' - 55"Clo+ 125"COperaling . - 6S"C to + I SO"C Storase . WEIGHT 0.9 o;z(25gram.) . OBSOLETE
the block diagram shown in Figure I. NOTE, ".0'0'" "GNO.', AND " ""'D" ARE INTERHALLY CONNECTEDIN STAR POINT. Figure 7. Theory of Operation Table" section on this page. under the "Digital Data Input" section. ALOand Am are for the analog input reference voltage (VREF). externally isolated using the STMI680 or STMI660 transformer. See the section on "Output and Reference Transformers". be:WlUlect~ to a convenient zero potential point in the system. pins with "81G GND" as the common connection. be connected to the corresponding Sin and Cos outputs. current into each external digital driver. Figure 2. Data Transfer Diagram
9 Qro31
- _81E",~ TEMPERATURE 21'1:. NO HEAT SlftK,
- TEMPERATuRE MONITORED WITH WORST CASE DIGITAL 'NNT '46'.
- TEMPERATURE MEASURED ON HOTJEST PART Of; CASE
keep the temperature of the case below its 12S.C maximum. power (even under worst case pure inductive load conditions. The maximum permitted junction temperature is 15S.C). The following describes how to calculate the load. wbcr~V2is the rms signalinput voltagc. figure ofO.30VA should be added. ,. AMIIIENT T'£MPERATUBE 21'(;.",0 HEAT SINK. J. TEMPERATURE MEASURED ON HOTIEST PART DF CASE. Figure 5. Case Temperature for Inductive Loads must be performed but it is not necessary to multiply by 3/4. the STM1683 transformer pair is used. capacitive at all frequencies above. capacitor to prevent highly dissipative output stage oscillation. Where CL is the capacitive load.
- Page 17 DRC1745/DRC1746 OUTLINE DIMENSIONS PACKAGING SPECIFICATIONS Dimensions shown in inches and (mm). STM1680 I I T -.':. STM1680 "~. ANALOGaDEVICES OP'TlON """'DU,. INTHI$1'O8I1ION t2UaI / 1 0.."..""---1 I-,~i",:,~ I 1."0 I Tun [".111 I 1-1 'H"Ll TH"[OOS> ~u'a"u"---I.Ol1OM v..w ANALOGDEVICES fAX-ON-DEMAND HOTLINE II 6 t I'IIIANAlOG"' T 1::== 1.m,"'..., 3.000 "".80)I-~ S'" OND [01 OPTION MARK'D STM1683 ~/ ..::\\'.mh"N OPTICN :~:~Ii cJfrrD.'" C:::J,\\ IS'R'Al NO.MAA... 'NTHlSrCSmON III."a I T'.4>1111.111 L ~ jaoTTOM VIW'.N' ",.,.. NOns DRC1745/1746 I~t14.11 -+ PIN O~E GREEN GLASS .EAD ~OOOOQOOOQ 0000000000 l.t40 I - (/J8~~t. "';z'" 00000000000000000000 ~ -IBOTTO~ VIEW .2.140 154.4! °pINS t5 . ,. A"E NOT CONNECfEO INICION ""'01745. PON., IS "NIC" ON "C" OPTION AND" +SV" ON "L" OPTION. UNLESSO1>IEI\\WISE SfAttD
ORDERING INFORMATION
j I745/L r T r /L Add B after pan number 1745 = 14-B~t Resolu~on ~~t'.liability processing1746 = I£>.Bl1 Resoluuon 2=:r2 Arc-Mins Accuracy I I 4 =:!:: 4 Arc-Mins AccuracyL = Low power SchOttky input latches C = CMOS input latches. T = Internal TlTIDSZorbprotection 0 = Without TrantiZorb protection STMI680.A 1680=360Hz-ZO6kHz---I h A = Z6V (26V reference, synchro) A = 115V (1J5V reference, syncltro) A = I1V8 (1I.8V reference, resolver) A = 26V (26V reference:, resolver) STMI683.4YZ STM for synchro jTIlg Z = 1 (11.8V nnssynchrooutput) OUtput option. Z = 2 (90V nns synchro output) Z = 3 (11.8V nns resolver output) RTM for resolver Z = 4 (26V nus resolver OUtput) output options Z = 8 (I 1.8V rms resolver output) 1683 -36OHz-2.6kH:t Y = 1360Hz to 2.6kHz (STM1683 only) Y = 247Hz to 440Hz (STMI663 only) 4 = - 55"C to + 125"C OperatiDS temperature range, ('oj III! 0)('oj D «tri ::) c -8- REV.A ~-- ---- .-L. I 3001 I I l0 , 0. . 7 . 0. 0- -@- I AKINO IN. """mON I a 0 0 0 I . . 4 OBSOLETE