HDL-3805

HDL-3805_15 AD | Alldatasheet

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Technical content

Digital-to-AnalogConverters PRELIMINARY DATA

FEATURES

Small Size (2.3"x 1.5") latched Composite Functions (HDl-3806)

APPLICATIONS

GENE~L DESCRIPTION The HDL-3805 D/A Converterisa thick-filmhybrid which includesthreeAD9700 IC D/A convertersand threeECL random accessmemory (RAM) look-uptablesin a singlepackage.Itis thesmallest,lowest-powerRGB (red,green,blue)videogenerator availabletovideodesignersofhigh-resolutionrasterscangraphics displays. With eightbitsof Gray scaleresolutionper channel,theuser has a totalpaletteof 16.7millioncolors.Sinceeach of the three DACs has a 256 x 8 RAM, a totalof256 colorsisavailableon each sweep. The writespeed of the RAMS issufficientlyhigh to rewritethecolormap completelyduring verticalretrace,or update smallerblocksofdata during horizontalretrace. ABSOLUTE IRE OUTPUT Composite functionsin the HDL unitsincludeRed Sync, Green Sync, Blue Sync, Composite Blanking,ReferenceWhite, and 10% Bright.The abilityof thedevicestodrive75flloadsdirectly with a IV composite signalcombines with thesefunctionsto assuretheoutputswillbe compatiblewith thegeneralrequirements of EIA StandardsRS-170 and RS-343. The model HDL-3806 D/A Converterisa variationof the HDL-3805 which includessynchronous compositefunctionsand offersincreasedflexibilityforthe designerina pin-for-pincom- patiblepackage. Allmodels of the HDL-3805 and HDL-3806 arehoused in46- pin metal hybrid packages.Standard versionsareratedover an operatingtemperaturerange of - 25°C to + 85°C;forunitswith thisrangeand militaryscreening,consultfactory. 10% BRIGHT LEVEL --- ----REfERENCE WHITE LEVEL IV,wl REFERENCE BLACK LEVEL IV"I -- COMPOSITE BLANKING LEVEL IV,' 100 IRE UNITS. 71<mV IdealizedComposite Output Waveform Information furnished by Analog Devices isbelievedto be accurate and reliable.However, no responsibilityisassumed by Analog Devices for itsuse;nor for any infringementsof patentsor other rightsof third partieswhich may resultfrom itsuse.No licenseisgrantedby implica- tion or otherwiseunder any patent or patent rightsof Analog Devices. Route 1 IndustrialPark;P.O. Box 280;Norwood, Mass.02062 Tel:617/329-4700 TWX: 710/394-6577 West Coast Mid-West Texas 714/641-9391 312/653-5000 214/231-5094 OBSOLETE

SPEe IFieATIONS (typical@ + 25"C with nominal power supplies unless othelWise noted) UnitsParameter RESOLUTION Bits LEAST SIGNIFICANT BIT (LSB) WEIGHT Voltage mV Current HDL-380SBM--8 2.5 * * Dimensions shown in inches and (mm). HDL.3806BM HDL-3806CM ACCURACY (GS = Gray Scale;FS = Full-Scale) Linearity DifferentialLinearity IntegralLinearity Zero Offset(Initial) :t% GS :t%GS :t%GS,max mV,max 0.2 0.2 0.2 1.5 Guaranteed * * TEMPERATURE COEFFICIENTS Linearity Gain ZeroOffset ppmrC(max) ppmrc (max) ppml°C (max) 125 DYNAMIC CHARACTERISTICS- GRAY SCALE OUTPUT' SettlingTime to0.4% GS; OV to637 .5m V GS Change Voltage ns(max) OUtpUt Time Skew (Among RGB OUtputs) Update Rate Slew Rate Rise Time GlitchEnetgy Crosstalk (Among RGB Outputs) Clock Noise on RGB OUtputs ns,max MHz (min) V/fJoS,min ns (max) pV-s :t%GS mV (ll5)* DIGITAL DATA INPUTS LogicCompatibility Coding Logic Levels "I" "0" Loading Data and Address RGB Chip Select Write Enable RGB Sync, Composite Blanking Reference White, or 10% Bright Strobe SPEED PERFORMANCE-CONTROL INPUTS (StandardSetupControl~ 7.5IRE Units= 53.25mV) SettlingTime to10% ofFinalValuefor: 10% Bright ReferenceWhite V (minimax) V (minimax) fJoA/pF fJoA/pF fJoA/pF fJoA/pF ns,max ns,max ns,max ns,max ANALOG OUTPUTS (Red,Green,and Blue) GS Current2 mA 0 to - 17 GSVo!tage3 mV(:tI%) Oto -637.5 Compliance V -1.2to +0.1 REFERENCE WHITE4 Current Logic"I" Logic"0" Voltage Logic"I" Logic"0" J()%BRiGHTs Current Logic"I" Logic"0" Voltage Logic" I" Logic"0" mA(:tS%) mA(:tS%) mV(:tS%) mV(:t5%) mA(:t5%) mA(:tS%) mV(:t5%) mV(:t5%) Normal Operation 00r-1.9 Normal Operation Oor-71 -1.9 -71 -2- OUTLINE DIMENSIONS 0.2305 15.8551 ~~T 0.210 15.3341 0.140 13.5561 -l r: .,OO 12.54) "0.010 ,,0.002 ~ 22 PLACES r !I-~ o-o-o-o-o-o-o-~o_A]x N " ":E'i: -~ L -o'()-o-<)-o-o-o-o-o-o-o-o-o-o-o-o-o-o-CHYO-O-O-II I ID BEAD AND DOT ION TOPI DENOTE PIN 1 PIN DESIGNATIONS (Bottom View) DIGITAL GROUND REDOUT V"I-5.2VI REDOUT RED RETURN GREEN CHIP SELECT DIGITAL GROUND GREEN OUT V"I-5.2VI GREEN OUT GREEN RETURN DIGITALGROUND BLUE OUT V"I-5.2V) BLUE OUT BLUE RETURN REDSYNC GREEN SYNC BLUE SYNC 10%BRIGHT REFERENCE WHITE WRITE ENABLE ADDRESS A, (MSB) ADDRESS A, ADDRESS A, ADDRESS A, V"I-5.2V) ADDRESS A, ADDRESS A, ADDRESS A, ADDRESS A, ILSBI DIGITAL GROUND DATAIND,IMSB) DATAIND, DATAIND, DATAIND, DATA IN D, DATAIND, V"I-5.2V) DATAIND, DATAIND,ILSB) BLUE CHIP SELECT STROBE NOTES, GROUNDS ARE NOT CONNECTED INTERNALLY. CONNECT PINS 11. 23. 30, 34, 35. 39. 41, AND 45 TOGETHER AND TO GROUND AS CLOSE TO CASE AS POSSIBLE. -5.2V MUST BE APPUEDTOALL DESIGNATED PINS. 10(12) 2 * 100(85) * 300 2(3) 0.2 ECL Complementary Binary(CBN) -0.9(-1.1/-0.6) -1.7(-2.0/-1.5) 880118 OBSOLETE

1-4 $ 430 463 For applicationsassistance,phone Computer Labs Divisionat(919)668-9516 512 NOTES 'Settlingto GS percentage includes FS and MSB transitions.Inherent 3ns registerdelay (50%) points) is not included. 'GS current~ FS current- videofunctions. 'LSB value of 2.5mV used for calibration.Ths causes Gray Scale output to be 637.5mV rather than 643mV sbown in idealizedcomposite waveform elsewhere in thisdata sheet; both values are weD within the output and EIA Standard RS-343 tolerances. 'EffeCt on analog output of Logic "0" at Reference White input depends on 10% Bright signal input. '10% Bright, Composite Sync, and Composite Blanking outputs shown add to Gray scaleanalog output at Pin 31, 36, or 42. 'Red Sync, Green Sync, Blue Sync, or Composite Sync control signalsreset input registers.Neither the RGB Sync signalsnor the Composite Sync should be operated simultaneously with Reference White. 7Air flow of 500 LFPM required when operating unit. 'Maximum junction temperature ~ 1500<;. 'Specificationsame as HDL-3g05BM. Specificationssubject to change without notice. -3- Parameter Units HDL-3805BM HDL-3806BM HDL-3806CM COMPOSITE SYNCS,6 (AppliedtoRED SYNC, GREEN SYNC, orBLUE SYNC InputPins) Current Logic"0" mA(:!:4%) -7.6 * Voltage Logic"I" mV(:!:4%) 0 * Logic"0" mV(:!:4%) -285 COMPOSITE BLANKING'.6 (StandardSetupControl= 7.5IRE Units= 53.25mV) Current Logic"I" mA (:!:4%) 0 * * Logic"0" mA(:!:4%) -1.4 * Voltage Logic"I" mV(:!:4%) 0 Logic"0" mV(:!:4%) -53.25 POWER REQUIREMENTS Power Dissipation' W,max 7.55 * * Power Supply RejectionRatio %GSN 0.025/0.25 * * TEMPERATURE RANGE Operating(Case) °C -25to +85 * Storage °C - 55to + 150 THERMAL RESIST ANCE8 JunctiontoAir,Oja °CIW,max 12 * * (FreeAir) JunctiontoCase,Oja °CIW, max 2.5 OBSOLETE

Refer to theblock diagram of the HDL-380S/3806 D/A Converter. As shown, the unitiscomprised of threeeach random access memories (RAMs) and AD9700 currentoutput D/A converters. These components operateas threepairsin controllingthe red, green,and blue (RGB) analogoutputsof the device;and gready simplifytheinterfacebetween the frame buffersand themonitor in rasterscan graphicssystems. RGB digitaldatainformationcan be loadedintothe RAMs during retraceperiods.During horizontalretraceintervals, smallblocksofdata can be entered;the complete colormap can be rewrittenduring the longerverticalretracetimes. Intensitiesforthe RGB outputsareupdated by a single8-bit addressword and a Strobesignalduring the RAM read operations. The routingofthedigitaldatatothecorrectRAM and itsassociated D/A iscontrolledby the digitalAddress inputSignals;and by the Red Chip Select,Green Chip Select,Blue Chip Select,and Write Enable signals. In additiontodigitalinputand addressinformation,the userof the HDI-380S/3806 alsohas controlover compositefunctions with Red Sync, Green Sync, Blue Sync, Composite Blanking, ReferenceWhite, and 10% Bright. 256 x RAM AD9700 D/A CONVERTER *BUFFER REPLACED WITH D-TYPE REGISTERS CLOCKED BY PIN 22 STROBE IN HDG-3806. HLD-3805/3806 Block Diagram -4- .1 I I 256 I AD9700 41) RED RETURNx D/A8 CONVERTERRAM JI I If ADO700 f-+-{35)GREEN RETURN x D/A R:M CONVERTER OBSOLETE

SYNCHRONOUS VS. ASYNCHRONOUS OPERATION Asynchronous compositeoperationispossiblewith theHDL-380S becauseitscompositeinputsareunlatched;the HDL-3806, on the otherhand, offerssynchronousoperationwith latchedcom- positeinputs. There aretwo situationswhich requiresynchronouscomposite operationforbestdisplayquality. The firstof theseisforapplicationsinwhich the rasterfieldis smallerthan the visiblefaceof the displaytube.Ifoperated asynchronously,any timingmismatch between thepixelclock (strobeinput)and the compositeblankingcontrolcould cause the pixelatthe end of each lineto be partiallyilluminated. The second situationoccurswhen the 10% brightfunctionis used foroverlayon the display.Ifthisoverbrightsignalisused atpixelrates,itmust be synchronizedwith the pixelclock. Figure 3,the Composite Blanking Timing Diagram, illustrates the timingforboth synchronous and asynchronouscomposite inputs. When operatingsynchronously,the Composite Blankinginput must returnto the digital"I" logiclevelone pixelclockperiod beforethe displaylinebegins.This isnecessarybecauseofthe delaytime of the composite functionregister.The timingof the change to Logic "I" isimportanttoavoidthe possibilityof losingthe firstpixelof the new line. In Figure 3, some strobepulsesareshown as "first"or "last" strobestohelpillustratesynchronousvs.asynchronousoperation. The userneeds to remember itisthe leadingedge of the strobe which causesthe edge-triggeredAD9700 convertersto operate. The D/A inputsshown in Figure 3 arethe digitalinputsapplied to the built-inregistersof the internalAD9700 D/A converters. These areasynchronousforthe HDL-380S; and'synchronous forboth models of the HDL-3806. Lt>ex) <.0 cb a;u '~==~ REGISTER INPUT DATA STROBE II II II (PIXElCLOCK)~ U. U L L LAST STROBE OF - - - -;;;RSTSTROBEPRECEDING LINE OF NEW LINE - _IASYNCHRONOUS) I x COMPOSITE BLANKING x x c L FIRST STROBE OF NEW LINE (SYNCHRONOUS)

ORDERING INFORMATION

There isone standardmodel of the HDL-380S D/A converter, and two model numbers forthe HDL-3806 version.Specifically, the designationsare HDL-380SBM; and HDL-3806BM and HDL-3806CM. The HDL-380S unitoperateswith unlatched asynchronouscompositeinputs;and both models oftheHDL-3806 operatewith latchedsynchronous signals. In terms of speed,the HDL-380SBM and HDL-3806BM are identicalwith minimum update ratesof 8SMHz, and typical word ratesof IOOMHz. The HDL-3806CM isspecifiedata minimum update rateof l1SMHz. Standard unitsoperateover a casetemperaturerangeof - 25°C to + 85°C; unitswith the same temperaturerangeand military screeningarealsoavailable.For these,consultthe factory. - ~~ <i. uj ::> a:a.. -6- D/A INPUT] 0 I X '[(HDL-38051 --- D/AINPUT] X \\ I '[IHDL-3806) -- Figure3. Composite BlankingTiming Diagram OBSOLETE