related to jitter cleaner

Piera

Prodigy 250 points

Other Parts Discussed in Thread: LMK05028, LMK05318, CDCE62002, CDCLVC1103

we need to support for clean jitter...

over 7 years ago

0 Hao Z over 7 years ago

TI__Mastermind 18070 points

Hello Priyanka,

You can start with jitter cleaner selection guide: www.ti.com/.../products.html

Regards,
Hao

0 Piera over 7 years ago in reply to Hao Z

Prodigy 250 points

please find attached schematic...we need to clean jitter crystal output, divider input and output..please suggest clean jitter without programming ICsch-divider-circuit-1.pdf...

0 Hao Z over 7 years ago in reply to Piera

TI__Mastermind 18070 points

I'm afraid that all of the jitter cleaners need programming. However, you can choose the ones that have EEPROM, so that you can pre-program the part and it won't need further programming in your application. You can check out LMK05028 and LMK05318.

Regards,
Hao

0 Piera over 7 years ago in reply to Hao Z

Prodigy 250 points

we need to only two output because unused output create floating..do you have any other jitter cleaner IC or other divider IC which divided by 32..

0 Hao Z over 7 years ago in reply to Piera

TI__Mastermind 18070 points

If you look at the selection guide that I sent previously, there is a column of "number of outputs".

For example, CDCE62002 has two outputs. If you look at its datasheet, the first page says that it supports divide-by-32.

Regards,

Hao

0 Piera over 7 years ago in reply to Hao Z

Prodigy 250 points

do you have any other circuit or idea for cleaning jitter without using jitter cleaner ic...

0 Hao Z over 7 years ago in reply to Piera

TI__Mastermind 18070 points

The idea of jitter cleaning is to use the VCO phase noise to replace the phase noise of noisy reference outside the loop bandwidth. So it requires PLL and it is not a simple structure.

Depending on your requirement for jitter, you can select a cleaner clock source instead of doing jitter cleaning.

You can have a look at the clock generator selection guide: www.ti.com/.../products.html

Regards,
Hao

0 Piera over 7 years ago in reply to Hao Z

Prodigy 250 points

can we use CDCLVC1103 for removing jitter at crystal output (74.25MHz)

0 Hao Z over 7 years ago in reply to Piera

TI__Mastermind 18070 points

According to your descriptions the CDCLVC1103 is suitable. It has two diff outputs, supports divide-by-32, supports 74.25 input. But like I said, jitter cleaners are not simple IC, so register programming is always required.

Regards,
Hao

Clock & timing

Clock & timing forum

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