nRF9160 LFXO accuracy over temperature

[crabam]

Hi,

in Product Specification document of nRF9160 Product Specification

I found that accuracy of LFXO is +/-20ppm

is this accuracy valid for all the temperature range -40° to +80°C ?

or will-it vary somehow?

[Martin Sivertsen]

Hello,

I'll look into this and get back to you by tomorrow.

Best regards,

Martin S.

[Martin Sivertsen]

Hello Catalina,

Here are the specifications of a crystal that is of the same kind that is inside the nRF9160 System in Package.

We can see that the frequency tolerance is valid within 25±3°C, outside of that temperature range we can apply the temperature coefficient and get a parabolic curve that shows the deviation in ppm.

Take a look at this paper to see how it is applied.

Best regards,

Martin S.