DP83826E: How should the capacitors be chosen?

Hi Koyo,

I will need to confirm for you on which decoupling is correct. My apologies on the confusion. I should have an answer for you in the next day

Thanks,

Cecilia

Hi Cecilia,

I understand the combination of 1uF and 0.1uF is correct.

How did you make sure 1uF and 0.1uF can isolate properly?

Also  different capacitance is used at C58 of app note (datasheet use 0.01uF but app note use 1000pF).

I would like you to show a guideline to calculate proper both capacitance.

Best regards,
Koyo

Hi Koyo,

Can you please share which app note you are referring to?

Thanks,

Cecilia

Hi Cecilla,

The app note means evaluation board user guide.
Please refer my first post, Figure 14 of the application note for evaluation board.

Koyo

Hi Koyo,

Ok thank you for pointing out. I will have a clearer response on the capacitor selection by end of day tomorrow.

Thanks for your patience.

Cecilia

Hi Koyo,

I am still currently working on trying to share the logic of why these capacitors were selected. What I can tell you is that our datasheet recommendations are based on validation tests performed on the device. The tests concluded the selection of the 0.1uF and the 1uF capacitors. 

Thank you for your patience.

Best,

Cecilia