Hello,
I am using a MSP430F5508 on a project with an external 20ppm/12.5pF rtc crystal and internal capacitors configured with the 12pF load capaciotor. The clock is drifting about 5 secons a day ans I was expecting no more than 2 seconds considering 20ppm. It is not tuned and not temperature compensated. It is used between 10 and 40ºC so according to the datasheet the temperature should not create such difference. All the boards are faster than they should so i belive the load capacitance is smaller than it should be correct? Any idea of where should i start looking for improvments? Maybe as i am using LQFP package the pins got big inductance?
Any help is apreciated,
Regards,
LR