The datasheet (section 7.7) gives typical values for the capacitors connected between VDDA, VDDD, VDDG and GND, but no max and min values. It is also not clear whether this refers to the nominal values of the components, or the actual capacitance at the applied bias voltage. The EVM has the values from the table as nominal values, but uses 0805 size caps which seems to be a size that is on its way out for these capacitance values.
I wonder what capacitors I could use here, as ceramic capacitors (especially high values in small packages) have a very large temperature coefficient, so a 4.7 µF, 10 V, 0402 capacitor might have less than 1 µF left when 6.1 V is applied. Is such a capacitor still a good choice for CA?
Would it be bad to have more capacitance than what is listed in 7.7, or is more perhaps better (or at least not worse)?
I would like to use the same capacitor for all three positions to limit the number of different components in the BOM. The following one is a candidate: Taiyo Yuden LMK107BBJ106MALT. 10 µF, 10 V, X5R, 0603. Would this capacitor be a good choice for all three positions? At 6.1 V it should have a capacitance of about 2 µF and at 3.2 V it should be about 4 µF.
Regards
Per