AWR1843BOOST: About Xtal Y1

Hiroyuki Kanematu

Expert 2975 points

Part Number: AWR1843BOOST
Other Parts Discussed in Thread: AWR1843

Please tell me how to determine the capacity of the AWR1843 Bost crystal oscillator 100 connected to both ends.

over 3 years ago

0 Cesar over 3 years ago

TI__Guru*** 147844 points

Hi,

Please give us some time to review this question

We will get back to you by end of next week

thank you

Cesar

0 aozer over 3 years ago

TI__Mastermind 29735 points

Hello,

Please clarify, your question is not clear. What is oscillator 100?

Did you review the reference design? The EVM schematic shows how to connect the 40MHz crystal.

Regards,

Adrian

0 Hiroyuki Kanematu over 3 years ago in reply to aozer

Expert 2975 points

I'm sorry, it's a mistake in the description.
What I wanted to visit was how did you decide the capacity of the capacitor connected to the Y1 crystal?

What does CP refer to in the connection of the clock circuit in the AWR1843 data sheet?
(See data sheet 8.10.2.1)

0 aozer over 3 years ago in reply to Hiroyuki Kanematu

TI__Mastermind 29735 points

The load cap is chosen based on the formula provided in the datasheet. Cp refers to the parasitic capacitance from the routing on the PCB.

Regards,

Adrian

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AWR1843BOOST: About Xtal Y1