nRF52840 - stability and tempco of RESN and RESP in SAADC

[Salas]

Hi support team,

I have found that RESN and RESP are typically 160 ohms, customer would like to know their stability and temperature coefficient.

Regards

Salas

[Andreas]

Hi Salas,

 

I will forward the inquiry internally and get back to you.

 

Best regards,

Andreas

[Andreas]

Hi,

 

Reply from our designer:

I think that should be 160 kOhm. The absolute value of this resistance should be expected to vary greatly (+- 20%) between device, it also has a temperature coefficient. However, the matching between RESP and RESN should be on the order of 1 %.

 

Best regards,

Andreas

[Salas]

Hi Andreas,

Thank you for your response.

Yes, you are right that they should be 160 kOhm, my typing mistake.  How about the temperature coefficient?

Regards

Salas

[Salas]

Hi Andreas,

Please help to close the case.  I couldn't find the "Close Case" button in this ticket.

Regards

Salas