Temperature range supported by nRF52840-DK and USB dongle

[Gopi]

What is the operating and storage temperature range of nRF52840-DK development kit and USB dongle? We need to use these evaluation boards at a temperature range of -20 to +80 degree, Is this ok?

[Gopi]

Thanks. I have already checked BOM, many components supports wide temp range but few like crystals does not support.

[Joakim Jakobsen]

Looking at the BOM I haven't found any components that doesn't support the temperature range you require.
Could you please specify which components you found that doesn't support the temperature range?

Best regards, 
Joakim

[Gopi]

Hi Joakim,

The Crystal part 7M-12.000MAAJ-T supports only -20 to +70, the last 'A' in the part number specifies -20 to +70ºC.

Thanks.

[awneil]

So that answers your question, then?

[Joakim Jakobsen]

Well, according to the datasheet the operating temperature range is -40 - +85ºC. So it is physically capable of handling those temperatures. 

However, the frequency stability of can only be guaranteed in the temperature range of -20 to +70ºC.  

So for the temperature range outside the defined range there could be some unwanted behavior. I think the 16Mhz could cause some abnormal behavior on the USB connection/debuggging capabilites of the DK. 

Best regards, 
Joakim