www.德州仪器.com
FEATURESDESCRIPTION
产品
DAC5687
SLWS164B–FEBRUARY2005–REVISEDJUNE2005
16-位,500msps2x-8xinterpolatingdual-频道
数字的-至-analogconverter(dac)
•
500MSPS
thedac5687isadual-channel16-bithigh-速
数字的-至-analogconverter(dac)withintegrated2x,
•
selectable2x-8xinterpolation
4x,and8xinterpolationfilters,acomplexnumerically
•
在-chippll/vcoclockmultiplier
controlledoscillator(nco),在-boardclockmultiplier,
•
fulliqcompensationincludingoffset,增益,
iqcompensationandon-chipvoltagereference.这
andPhase
dac5687ispincompatibletothedac5686,requir-
ingonlychangesinregistersettingsformostappli-
•
flexibleinputoptions:
cations,andoffersadditionalfeaturesandsuperior
–FIFOWithLatchonExternalorInternal
线性,噪音,串扰,andpllphasenoiseper-
时钟
formance.
–even/oddmultiplexedinput
thedac5687hassixsignalprocessingblocks:二
–SinglePortDemultiplexedInput
interpolatebytwodigitalfilters,finefrequencymixer
•
complexmixerwith32-bitnco
with32-bitnco,aquadraturemodulationcompen-
sationblock,anotherinterpolatebytwodigitalfilter
•
fixedfrequencymixerwithfs/4andfs/2
andacoarsefrequencymixerwithfs/2orfs/4.这
•
1.8-vor3.3-vi/ovoltage
differentmodesofoperationenableorbypassthe
•
在-chip1.2-vreference
signalprocessingblocks.
•
differentialscalableoutput:2mato20ma
Thecoarseandfinemixerscanbecombinedtospan
•
PinCompatibletoDAC5686
awiderrangeoffrequencieswithfineresolution.这
dac5687allowsbothcomplexorrealoutput.com-
•
HighPerformance
biningthefrequencyupconversionandcomplexout-
–81-dbcaclrwcdmatm1at30.72mhz
putproducesaHilbertTransformpairthatisoutput
–72-dbcaclrwcdmatm1at153.6mhz
fromthetwodacs.anexternalrfquadrature
modulatorthenperformsthefinalsinglesideband
•
包装:100-pinhtqfp
向上-转换.
TheIQcompensationfeatureallowsoptimizationof
•
CellularBaseTransceiverStationTransmit
阶段,gainandoffsettomaximizesidebandrejection
频道
andminimizelofeedthroughforananalogquadra-
turemodulator.
–cdma:w-cdma,cdma2000,td-scdma
–tdma:gsm,是-136,边缘/uwc-136
thedac5687includesseveralinputoptions:单独的
portinterleaveddata,evenandoddmultiplexingat
–ofdm:802.16
halfrate,andaninputfifowitheitherexternalor
•
CableModemTerminationSystem
internalclocktoeasetheinputtimingambiguitywhen
theDAC5687isclockedattheDACoutputsample
比率.
ORDERINGINFORMATION
T
一个
PackageDevice
100HTQFP
(1)
(p&放大;p)powerpad™
PlasticQuadFlatPack
-40°cto85°c
DAC5687IPZP
(1)thermalpadsize:6mm
×
6mm.
pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
necessarilyincludetestingofallparameters.
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