DAC1009

DAC1009_15 AD | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 4

Technical content

,.ANALOG W DEVICES Low CostMultipurpose Digital-to-AnalogConverter DAC1009

FEATURES

12 Bit Resolution

Fixed Reference or MultiplyingOperation TTL/DTL or CMOS Compatible Current or Voltage Output User SelectedOutput Ranges Small Size -2" x 2" x 0.4" (51 x 51 x 10mm) GENERAL DESCRIPTION The DACI009 isa lowtost, multipurpose digital-to-analog converterwhich can be readilyadapted to a varietyof appli- cations.This versatile12 bitdevicecan be programmed for fixedreferenceor multiplyingoperationand for currentor voltageoutput. Itwillinterfacewith CMOS or DTL/TTL logic systems and itfeaturesconvenient positive-truelogicinputs. Performance specificationsinclude :tl/zLSBlinearityerror, 411secsettlingtime for a 10V output step,and a gain tempera- ture coefficientof 11ppm/ C. OUTPUT VERSATILITY The DACI009 can be used ineitherthe voltageoutput or currentoutput mode. When itisused as a voltageoutput de- vice,anyone of the fivefollowingoutput rangesare available: Unipolar 0 to -5V, 0 to -10V Bipolar :t2.5V,:t5V,:tl0V Externaljumpers atthe module pins determine the output amplifierfeedback resistance.Offsetof exactlyone-halffull scalefor bipolarapplicationsisprovided by connecting a jumper between an internalreferencesource and the summing junctionof the output amplifier. As a currentoutput devicethe DACI009 can be used to drive an externalop amp. Internalfeedback resistorscan alsobe used with thisexternalop amp to assureoptimum temperature trackingof components. Information furnished by Analog Devices is believedto 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. DIGITAL INPUTS The DACI009 usesthe positive-truelogicconvention pre- resultsin the maximum absolutevalue analogoutput).The logiclevelsof: +2.0V « Logic "1" « + 15V OV « Logic "0" « +0.8V are compatible with both DTL/TTL and CMOS systems. When used with CMOS logic,the drivinggate for each input bitmust be capable of sinkingatleastImA. For unipolaroutputs eitherBinary or BCD code may be used;forbipolaroutputs OffsetBinary code isavailable. MUL TlPL YING CAP ABILITY The DACI009 can be readilyconfiguredas eithera one or two-quadrant multiplyingDAC. When used in thismanner the one-quadrant analog input of 0 to -lmA isattenuatedby an amount correspondingto the one-quadrant (unipolar)or two-quadrant (bipolar)digitalinput signal.By appropriate choice of the input resistorvalue,any input voltagerange may be used.The followingsectionsof thisdata sheetshould be consultedto determine whether the multiplyingcharacteristics of thisdevicemake itsuitablefor a given application. Route 1 IndustrialPark;P.O. Box 280; Norwood, Mass.02062 Tel:617/3294700 TWX: 710/394-6577 West Coast Mid-West Texas 213/595-1783 312/894-3300 214/231-5094 OBSOLETE

SPECIFICATIONS (typical@ +25°C and ratedsupplyvoltages,unlessotherwisenoted) OUTLINE DIMENSIONSVoltage Output Current Output RESOLUTION Binary BCD DIGITAL INPUTSI OV« Logic "0" « +0.8V +2V«Logic"I"«+ISV INPUT CODES Unipolar Bipolar OUTPUT RANGES (User Programmable) Voltage Compliance OUTPUT IMPEDANCE SETTLING TIME2 LINEARITY ERROR TEMPERATURE COEFFICIENT Gain Zero Unipolar Bipolar DifferentialLinearityError TEMPERATURE RANGE Operating Storage . POWER REQUIREMENTS

12 Bits

3 Digits

@ -lmA @ +401£A Binary,BCD Offset Binary 0 to -SV @ 10mA 0 to -10V @ SmA :t2.SV,:tSV @ 10mA HOV @ SmA 0 to +2mA :tlmA 0.02£1 411s(7l1smaxI :tY2LSB max :t400mV 6.9k£1 700ns (1.Sl1smaxI :tllppm/C (:t40ppm/oC maxI :t12I1V/C (:tSOI1V/C maxI' :tSOI1V/C (:t130I1V/C maxIs :t4ppm/C (:t10ppm/C maxI :t1nA/C max4 :t7nN°C (:t60nN°C maxI* 0 to +70°C -25°C to +85°C +lSV:t5% @ 17mA -15V :t5%@ 18mA POWER SUPPLY SENSITIVITy6 Gain Zero 0.lppm/%6Vs 1ppm/%6Vs ADJUSTMENT RANGE Gain Zero PRICES (1-9) (10-24) (25-99) (100+) :to.4% of F .5. :t14L5B $84 $71 $62 $54 .Specification issame as for Voltage Output Mode. IOpen input equivalent to Logic "1". 2To :to.Ol% accuracy for a fullscale output step. s For the 0 to -10V range. 4 Doubles every lO°C. 5For the :t5V range. 6 For the :tl5V supplies only, with +15V and -l5V supplies tracking. Specifications subject to change without notice. Dimensions shown in inches and (mm).

2.01 MAX

151.11 -{ -:::MAX 110.41 J-t- 0.2MIN --.L 15.11 41.'2 ,,', NOTE: Terminal pinsinstalledonly in shaded hole locations. Module weight:1.6 ounces (45 grams) Allpinsaregold platedhalf-hardbrass (0.48:to.025mm) diameter. For plug-inmounting card,order Board No. AC6160 @ $20.00. BLOCK DIAGRAM AND PIN DESIGNATIONS RE"UM XT " 10"" 9 "T3 omET "OUT CURRENT OUT 22 , "T >lM'RI OUTeUT " I Lv'UM'CT" ZERO" AD' Z ,,'" :3J NOTE. "N"HOWN", HAV'ND NOCONNEC"ON IN.CI ARE DEmED ORDERING GUIDE: DACIOO9 /X c XX BIN BCD --- OBSOLETE

The DAC1O09 isfullyDTLlTTL compatible with each input bitrepresentingone standardTTL load.The requiredlogic levelsof: +2.0V';;;Logic"1"';;;+15V OV .;;;Logic "0" .;;;+0.8V arealsocompatible with CMOS logicsystems.When driving the DAC1009 with a CMOS gate,standard CMOS/TTL inter- face rulesmust be observed to assurethat the CMOS gate will adequately sink at least1mA. Binary or BCD code can be used for unipolaroutput; Offset Binary code isused forbipolaroutput. The followingtable illustratesthe analog outputs associatedwith variousdigital input codes forfixedreferenceoperation. DigitalInput Binary (12Bits) Unipolar 111111111111 000000000000 Bipolar 111111111111 100000000000 000000000000 BCD (3 digits) Unipolar 1001 1001 1001 0000 0000 0000 Nominal Analog Output Voltage Output*1 Current Output -9.9976V +1.9995mA -9.9951V, +10V +0.9995mA -1.000mA -9.9900V + 1.2488mA *Voltagesshown are for the 0 to -10V and :t10V ranges;out- puts are proportionatelysmallerfor other ranges. VOLTAGE OUTPUT RANGE SELECTION The followingsimplifiedschematic (Figure1) representsthe DAC1009 output circuit. CURRENT OUTPUT R R -lmA REPERENCE OFFSET -=- R .4.99kl1 (1%) BINARY .8.06kl1 (1%) BCD 21 22 27 Figure 1.SimplifiedOutput Circuit The output voltagerange isdetermined by the amount of feedback resistanceused with the internalop amp. By con- nectingexternaljumpers between module pins,threefeedback resistancevaluescan be obtained. A -lmA currentmust be appliedto the internalop amp's summing junction to produce the halfscaleoffsetnecessary for bipolaroutput. The OFFSET OUTPUT (pin 21),derived from the module's internalreferencesource,providesthis current. The followingtableshows the externalconnections used to program the variousoutput ranges. Output Range :t2.5V :t5.0V :tlOV 0 to -5V 0 to -lOV Pinsjumpered Together 26,24 26,24 26,23 26,24 26,24 27,22,21,23 27,22,21 27,22,21 27,22,23 27,22 21,5 21,5 CURRENT OUTPUT APPLICATIONS The CURRENT OUTPUT terminal(pin22) providesan output of 0 to +2mA for unipolaroperation.When the OFFSET OUT- PUT of pin 21 isconnected to it,a :t1mA bipolaroutput re- sults.Because of the :t400m V compliance of the CURRENT OUTPUT terminal,only an externalinvertingop amp should be used to transform the currentoutput to a voltageoutput. The proper connection of such an op amp isshown below in Figure 2. ZERO ADJUST 20k" I ZERO ADJUST 20k" -15V >15V CW UNIPOLAR EXTERNAL OP AMP BIPOLAR Figure2.Connectionofan ExternalOp Amp (WithExternal Feedback Resistor) The feedback resistorswhich arenormally used with the in- ternalop amp can alsobe used with externalop amps to pro- vide optimum temperature trackingof the criticalgain deter- mining components. The arrangement of theseresistorsand theirconnections to the externalop amp areshown below in Figure 3. CURRENT OUTPUT' R -4.99k 11%1. BINARY . B.06k 11%1 BCD -=- BIN 2.5k 10k BCD 16k F,24 F,24 F,23 23,22 Figure3.ConnectionofExternalOp Amp toInternalFeed- back Resistors In order to prevent the introductionof noise,the lead from the CURRENT OUTPUT terminalto the externalop amp SUI ring junctionshould be made with shieldedcableand shoulc be kept asshortaspossible. FIXED REFERENCE OPERATION Each module containsa precision-6.2V (nominal) reference source,the output of which isavailableatpin 25. When the OBSOLETE