CDCM6208V1RGZT datasheet(40/78 Pages) TI

Part #	CDCM6208V1RGZT

Description	2:8 CLOCK GENERATOR, JITTER CLEANER WITH FRACTIONAL DIVIDERS

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Manufacturer	TI [Texas Instruments]

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De-Serializer

Serializer

TX REF

CLOCK

TX PLL

serial data with

embedded clock

CDR

RX REF

CLOCK

fhigh=BWTX PLL

RX PLL

flow=BWRX PLL

fhigh

flow

HTransfer(f) = HTXPLL * ( 1 - HRXPLL)

flow=1.875MHz for 10GbE

fhigh=20MHz for 10GbE

CDCM6208

SCAS931A – MAY 2012 – REVISED JUNE 2012

www.ti.com

Figure 38. Serial Link Jitter Budget Explanation

Jitter Considerations in ADC and DAC Systems

A/D converter and D/A converter are sensitive to clock jitter in two ways: They are sensitive to phase noise in a

particular frequency band and also have maximum spur level requirements to achieve maximum noise floor

sensitivity. The following test results were achieved connecting the CDCM6208 to ADC and DACs:

40

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