CDCM6208V2RGZT datasheet(65/92 Pages) TI1

Part #	CDCM6208V2RGZT

Description	2:8 Clock Generator, Jitter Cleaner With Fractional Dividers

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Manufacturer	TI1 [Texas Instruments]

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CDCM6208

Synthesizer

Mode

TMS320TCI6616/18

DSP

AIF

ALT

CORE

SRIO

PCIe

Packet

Accel

DR

Base Band DSP

Clocking

Pico Cell Clocking

DPLL

CDCM6208

APLL

GPS receiver

IEEE1588 timing

extract

Ethernet

SyncE

Et

he

rne

t

Timing

1pps

Core

Packet

network

FBADC

RXADC

TXDAC

RF LO

65

CDCM6208

www.ti.com

SCAS931G – MAY 2012 – REVISED JANUARY 2018

Product Folder Links: CDCM6208

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9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The CDCM6208 is a highly integrated clock generator and jitter cleaner. The CDCM6208 derives its output

clocks from an on-chip oscillator which can be buffered through integer or fractional output dividers.

9.2 Typical Applications

Figure 48. Typical Application Circuit

Figure 49. Typical Application Circuit

9.2.1 Design Requirements

The most jitter sensitive application besides driving A-to-D converters are systems deploying a serial link using

Serializer and De-serializer implementation (for example, a 10 GigEthernet). Fully estimating the clock jitter

impact on the link budget requires an understanding of the transmit PLL bandwidth and the receiver CDR

bandwidth.

9.2.2 Detailed Design Procedures

9.2.2.1 Jitter Considerations in SERDES Systems

As shown in Figure 50, the bandwidth of TX and RX is the frequency range in which clock jitter adds without any

attenuation to the jitter budget of the link. Outside of these frequencies, the SERDES link will attenuate clock

jitter with a 20 dB/dec or even steeper roll-off.

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CDCM6208V2RGZT Datasheet(PDF) 65 Page - Texas Instruments

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