TPS65911: Crystal oscillator design

Hi Matt,

Thanks for your information, 

We use crystal type is FC-135 from EPSON, I learn from crystal datasheet,there are some paramerer as follow picture(crystal datasheet in atachment):

Our initial design as follow picture, we use 12pF capacitors and 5.1M resistor as crystal periphel.

Coudl you tell me how to select the Max crystal series resistor, Crystal load capacitor and Load cryastal oscillator according to the 5.10 table you mentioned?

Thanks.

CDS-453564280221-2.pdf

Hi Gillette,

Thanks your information. quesriones need you support:

1.  From crystal datasheet, there are Motional resistance R1, Motional capacitance C1, Shunt capacitance C0, could you tell me where we use these components and how to select R1,C1,C0 value to keep crystal high frequency accuracy?

2. I found there was different between crystal recommend design as below and TPS65911 referrence design, could you tell me which one we can follow and how to select circuit capacitor and resistance value?

Hi Chambin,

Perhaps you can reach out to the crystal vendor for questions with their datasheet and component selection for their crystal. Unfortunately, we do not have familiarity with this device.

Best regards,

Matt

Hi Matt,

From th 5.10 of the TPS65911, the load crytal oscillator range from 12pF to 25pF, the reference cricuit use 22pF, could you tell me why select this value for these two capacitor?

Thanks.

Hi Conner,

Thanks for your information.

I am no idea from the Figure 12, could you give me more direct and clear description or method to select the crystal capacitors?

Thanks