AWR1642BOOST: CLK P Input // Need for capacitors?

George Denove

Part Number: AWR1642BOOST
Other Parts Discussed in Thread: AWR1642, AWR2243

Hi,

As per the attached document (TI's External Clock Requirements), it mentions choosing load capacitors to satisfy the CL Equation (Equation 1). Are these capacitors necessary or are they built in the AWR1642Boost?

I am thinking of using a signal/pattern generator to see if I can synchronize two AWR1642's together with an input of 40 MHz (necessary input frequency). This will hopefully end up turning into a system to software synchronize a network of AWR1642 clock crystals.

Thank you for your time and the the clarification!

George

5618.TI External Clock Documentation.pdf

over 5 years ago

0 Cesar over 5 years ago

TI__Guru*** 147934 points

Hi,

Let's first close your previous thread regarding feasibility before we go into more details

thank you

Cesar

0 George Denove over 5 years ago in reply to Cesar

Expert 1435 points

Hi Cesar,

I am going to implement this external clock input here soon. It will be 40 MHz input to CLK P pin (similar to the input for the cascade for AWR2243, but not since I am working with AWR1642).

I am just wondering if these capacitors are needed or if I can just input to each a 40 MHz signal to synchronize them this way.

Thanks.

George

0 aozer over 5 years ago in reply to George Denove

TI__Mastermind 29885 points

Hello George,

The load capacitors are only required if you are using a crystal oscillator. In your case they would not be required.

Regards,

Adrian

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AWR1642BOOST: CLK P Input // Need for capacitors?