Why is temperature sensor's accuracy dependent on clock accuracy?

[spachner]

Hi,

the nrf25840 data states regarding temperature sensor's accuracy:

To achieve the measurement accuracy stated in the electrical specification, the crystal oscillator must be selected as the HFCLK source

Could somebody please explain the background for this.

Thanks in advance

spachner

[haakonsh]

I'm afraid we can't devulge any specific information on this subject, in general, a crystal oscillator is much more temperature-stable than an RC oscillator.