CDCI6214: Related to output jitter

Piera

Prodigy 230 points

Part Number: CDCI6214
Other Parts Discussed in Thread: CDCE6214, CDCE813-Q1, CDCE6214-Q1, LMK04832

Hello,

im use CDCI6214 IC for jitter cleaning in circuit... but IC not remove proper jiiter...please see attached image

how to remove jitter at below 100ps using this IC

over 5 years ago

0 Noel Fung over 5 years ago

TI__Guru** 110980 points

Hi Piera,

CDCE6214 is design for clock generation. I am not sure how good it is if it is being used for jitter cleaning.

What is the clock frequency?

In general, a scope is not able to measure clock jitter accurately. We need decent test equipment such as E5052 to measure clock jitter, especially when the clock frequency is low.

0 Piera over 5 years ago in reply to Noel Fung

Prodigy 230 points

The input clock frequency is 74.25MHz....and output frequency is 2MHz

CDCI6214 ic suggested by TI for jitter cleaning circuit..

0 Piera over 5 years ago in reply to Piera

Prodigy 230 points

please check link...IC suggested by your side in this link for jitter cleaning circuit

https://e2e.ti.com/support/clock-and-timing/f/48/t/830978

0 Hao Z over 5 years ago in reply to Piera

TI__Mastermind 18070 points

Hello Piera,

I did mention that CDCE6214-Q1 has better jitter performance than CDCE813-Q1, but by that I mean it adds less jitter to a clean source. I did not suggest that it should be used for jitter cleaning.

Please visit our jitter cleaner portfolio. http://www.ti.com/clocks-timing/jitter-cleaners-synchronizers/products.html

Technically any PLL can be used for jitter cleaning as long as the loop bandwidth is narrow enough. But VCO phase noise needs to be very low for that purpose. LMK04832 is recommended for jitter cleaning.

Regards,
Hao

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CDCI6214: Related to output jitter