Texas Instruments LMX2594 Bruksanvisning
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Charge
Pump
Vtune
CPout
RFoutAP
Sigma-Delta
Modulator
N Divider
OSCin
Douber
Post-R
Divider
Multiplier
Pre-R
Divider
ϕ
Vcc
RFoutAM
RFoutBP
Vcc
Channel
Divider
Loop Filter
Phase
Detector
Serial Interface
Control
SDI
SCK
CSB
MUXout
OSCinP
OSCinM
Input
signal
RFoutBM
MUX
MUX
SYSREF
Copyright © 2017,Texas Instruments Incorporated
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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,
intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.
LMX2594
SNAS696C–MARCH2017–REVISEDAPRIL2019
LMX259415-GHzWidebandPLLATINUM™RFSynthesizer
WithPhaseSynchronizationandJESD204BSupport
1
1Features
1
•10-MHzto15-GHzoutputfrequency
•–110dBc/Hzphasenoiseat100-kHzoffsetwith
15-GHzcarrier
•45-fsrmsjitterat7.5GHz(100Hzto100MHz)
•Programmableoutputpower
•PLLkeyspecifications
–Figureofmerit:–236dBc/Hz
–Normalized1/fnoise:–129dBc/Hz
–Highphasedetectorfrequency
–400-MHzintegermode
–300-MHzfractionalmode
–32-bitfractional-Ndivider
•Removeintegerboundaryspurswith
programmableinputmultiplier
•Synchronizationofoutputphaseacrossmultiple
devices
•SupportforSYSREFwith9-psresolution
programmabledelay
•Frequencyrampandchirpgenerationabilityfor
FMCWapplications
•<20-µsVCOcalibrationspeed
•3.3-Vsinglepowersupplyoperation
2Applications
•5Gandmm-Wavewirelessinfrastructure
•Testandmeasurementequipment
•Radar
•MIMO
•Phasedarrayantennasandbeamforming
•High-speeddataconverterclocking(supports
JESD204B)
3Description
TheLMX2594isahigh-performance,wideband
synthesizerthatcangenerateanyfrequencyfrom10
MHzto15GHzwithoutusinganinternaldoubler,
thuseliminatingtheneedforsub-harmonicfilters.The
high-performancePLLwithfigureofmeritof–236
dBc/Hzandhigh-phasedetectorfrequencycanattain
verylowin-bandnoiseandintegratedjitter.Thehigh-
speedN-dividerhasnopre-divider,thussignificantly
reducingtheamplitudeandnumberofspurs.Thereis
alsoaprogrammableinputmultipliertomitigate
integerboundaryspurs.
TheLMX2594allowsuserstosynchronizetheoutput
ofmultipledevicesandalsoenablesapplicationsthat
needdeterministicdelaybetweeninputandoutput.A
frequencyrampgeneratorcansynthesizeuptotwo
segmentsoframpinanautomaticrampgeneration
optionoramanualoptionformaximumflexibility.The
fastcalibrationalgorithmallowschangingfrequencies
fasterthan20µs.TheLMX2594addssupportfor
generatingorrepeatingSYSREF(compliantto
JESD204Bstandard)designedforlow-noiseclock
sourcesinhigh-speeddataconverters.Afinedelay
adjustment(9-psresolution)isprovidedinthis
configurationtoaccountfordelaydifferencesofboard
traces.
TheoutputdriverswithinLMX2594deliveroutput
powerashighas7dBmat15-GHzcarrierfrequency.
Thedevicerunsfromasingle3.3-Vsupplyandhas
integratedLDOsthateliminatetheneedforon-board
lownoiseLDOs.
DeviceInformation
(1)
PARTNUMBERPACKAGEBODYSIZE(NOM)
LMX2594VQFN(40)6.00mm×6.00mm
(1)Forallavailablepackages,seetheorderableaddendumat
theendofthedatasheet.
SimplifiedSchematic
Produktspecifikationer
| Varumärke: | Texas Instruments |
| Kategori: | ej kategoriserat |
| Modell: | LMX2594 |
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