CDCM6208V1RGZT datasheet(26/78 Pages) TI

Part #	CDCM6208V1RGZT

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

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Manufacturer	TI [Texas Instruments]

Direct Link	http://www.ti.com

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26 / 78 page

VCXO_P

VCXO_N

Yx_P

Yx_N

Yx_P

Yx_N

Yx_P

Yx_N

Yx_P/N

Differential

Differential, Integer Divide

Differential, Fractional Divide

Single Ended, Integer Divide

tPD, SE

tSK,SE,FRAC

tPD,DIFF

tSK,DIFF,INT

tSK,DIFF,FRAC

Yx_P/N

tSK,SE,INT

Single Ended, Fractional Divide

VCXO_P

Single Ended

tSK,SE-DIFF,INT

CDCM6208

SCAS931A – MAY 2012 – REVISED JUNE 2012

www.ti.com

TYPICAL CHARACTERISTICS (continued)

Figure 25. Differential and Single Ended Output Skew and Propagation Delay

DEVICE BLOCK-LEVEL DESCRIPTION

The CDCM6208 includes an on-chip PLL with an on-chip VCO. The PLL blocks consist of a universal input

interface, a phase frequency detector (PFD), charge pump, partially integrated loop filter, and a feedback divider.

Completing the CDCM6208 device are the combination of integer and fractional output dividers and universal

output buffers. The PLL is powered by on-chip low dropout (LDO), linear voltage regulators and the regulated

supply network is partitioned such that the sensitive analog supplies are running from separate LDOs than the

digital supplies which use their own LDO. The LDOs provide isolation of the PLL from any noise in the external

power supply rail with a PSNR of better than -50 dB at all frequencies. The regulator capacitor pin REG_CAP

should be connected to ground by a 10 µF capacitor with low ESR (e.g. below 1

Ω ESR) to ensure stability.

26

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CDCM6208V1RGZT Datasheet(PDF) 26 Page - Texas Instruments

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