CDC7005: clock jitter cleaner vs buffer

user6052542

Part Number: CDC7005
Other Parts Discussed in Thread: LMX2592

hi, I want to design a clock distribution circuit, but I'm not sure which kind device I should choose, clock Jitter Cleaner with Cascaded PLLs or a simple buffer.

This is my requirement below:

10MHz reference as the input, output has 10MHz and two 300MHz, 10M will be applied as the clk of LMX2592, 300M will be applied as the clk of AD/DA.

The PN of output 10M is listed below:

I want to know which can fit my request, clock jitter cleaner or buffer. Looking forward to your reply. Thanks.

over 6 years ago

0 Hao Z over 6 years ago

TI__Mastermind 18070 points

Hi Zhihui,

It seems that you are looking for jitter cleaner/network synchronizer. Buffers typically generate outputs that have the same frequency with input. Now that you need 300MHz out of 10MHz, you will need jitter cleaner/network synchronizer. After generating the desired frequency, you can consider fanout buffers to create more outputs, depending on the number of clock paths needed.

Here is the selection guide:

www.ti.com/.../products.html

www.ti.com/.../products.html

www.ti.com/.../products.html

By the way, you may consider using higher input frequency for LMX2592 for better phase noise.

Regards,
Hao

Clock & timing

Clock & timing forum

CDC7005: clock jitter cleaner vs buffer