Texas Instruments LMH1218 Bedienungsanleitung

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OUT0+

OUT0-

OUT

OUT

LMH1218

:

4.7 PF

IN0-

IN0+

FPGA

100: Differential T-Line

OUT1+

OUT1-

IN+

Optical Module

100: Differential T-Line

4.7 PF

OUT

OUT

FPGA

100: Differential T-Line

IN1-

IN1+

MODE_SEL

SS_N

SCK

MOSI

LOS_INT_N

MISO

ENABLE

VSS

VDD

LOCK

:T-Line

4.7 PF

4.7 PF

DAP

IN-

0.1 PF

0.01 PF

VSS

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LMH1218

SNLS474E–FEBRUARY2015–REVISEDJUNE2018

LMH1218LowPowerUltraHDCableDriverWithIntegratedReclocker

1

1Features

1

•SupportsST-2082(Proposed),ST-2081

(Proposed),SMPTE424M,344M,292M,259M,

DVB-ASI,SFF-8431(SFP+)and10GbEEthernet

forSMPTE2022-5/6

•LockstoRates11.88Gbps,5.94Gbps,2.97

Gbps,1.485Gbps,orDividedby1.001Sub-

Rates,DVB-ASI(270Mbps)and10GbE(10.3125

Gbps)

•Reference-FreeOperationWithFastLockTime

CoveringAllSupportedorSelectedDataRates

•75-Ωand100-ΩTransmitterOutputs

•Integrated2:1MuxInput,1:2Demux/Fanout

Outputs

•AutomaticSlewRateBasedonInputRateDetect

•On-ChipEyeMonitor

•Low300-mWPowerConsumptionWithAutomatic

PowerDownonLossofInputSignal

•ProgrammableThroughSPIorSMBusInterface

•Single2.5-VSupplyOperation

•Small4-mm×4-mm24-PinWQFNPackage

•–40°Cto+85°COperatingTemperatureRange

2Applications

•UHDTV/4K/8K/HDTV/SDTVVideo

•DigitalVideoRoutersandSwitches

•DigitalVideoProcessingandEditing

•DVB-ASIandDistributionAmplifiers

•10GbEforSMPTE2022-5/6

3Description

TheLMH1218deviceisalow-powercabledriverwith

integratedreclockertodriveserialvideodata

compatibletoSMPTE-SDI,SMPTE2022-5/6,10GbE

Ethernet,andDVB-ASIstandards.TheLMH1218

supportsupto11.88GbpstoenableUltraHigh

DefinitionVideofor4K/8Kapplications.With75-Ω

and50-Ωtransmitteroutputs,theLMH1218enables

multiplemediaoptionssuchascoax,fiber,andFR-4

PCB.

Theintegrated2-to-1MUXontheinputofthe

LMH1218enablesselectionbetweentwovideo

sources,whiletheprogrammableequalizer

compensatesfortheprinted-circuitboardlossto

extendsignalreach.Withawiderangeclock-and-

datarecovery(CDR)circuit,theon-chipreclocker

automaticallydetectsandlockstoserialdatafrom

270Mbpsto11.88Gbpswithouttheneedforan

externalreferenceclockandloopfiltercomponent,

therebysimplifyingboarddesignandloweringsystem

cost.Thereclockedserialdatacanberoutedto

eitherthe75-Ωor50-Ωtransmitteroutput,orboth

simultaneously(1-to-2fanoutmode).Theoutput

voltageswingiscompatibletoSFF-8431(SFP+),ST-

2082/1(Proposed),SMPTE424M,344M,292M,and

259Mstandards.

Anon-disruptiveeyemonitorallowsforreal-time

measurementofserialdatatosimplifysystemstart-

uporfieldtuning.TheLMH1218canbeprogrammed

usingSPIorSMBusInterface.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LMH1218WQFN(24)4.00mm×4.00mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

SimplifiedSPISchematic

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