AM3352: Crystal resonator maximum load capacity

Conor

Part Number: AM3352

Hi,

I have a question regarding the AM3352 crystal oscillator. When we asked the crystal oscillator manufacturer we were considering for matching, we received the opinion that the optimal load capacitance for the custom board would be 27 to 30pF.

However, the AM3352 data sheet states that the maximum load capacitance is 24pF.

Is it possible to connect and use a 27p to 30pF capacitor to AM3352? Please let me know if you have any concerns.

Thanks,

Conor

over 2 years ago

0 peaves over 2 years ago

TI__Guru 64655 points

No. You need to select a crystal with a lower load capacitance.

Regards,
Paul

0 Conor over 2 years ago in reply to peaves

Guru 14870 points

Hi Paul,

Thanks for your comment.

Q1.
The optimal load capacitance for a custom board is 27 to 30 pF, but what is the possible impact if it is operated at 24 pF?

Q2.
What are the concerns when operating with a load capacitance of 30pF?

Please let me know if you have any other advice in addition to Q1.2.

0 peaves over 2 years ago in reply to Conor

TI__Guru 64655 points

A1. The oscillation may not start.

A2. The oscillation may not start.

Why are you not selecting a different crystal that was trimmed for resonance with a lower capacitive load?

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AM3352: Crystal resonator maximum load capacity