https://devzone.nordicsemi.com/f/nordic-q-a/8652/temperature-coefficient-of-adc-in-nrf51822I am wondering where I can find the temperature dependent behavior of the ADCs on nRF51822. I observe the ADC readings vary noticeably even when the die temperature reading shows difference of only 4 degree Celsius. I am trying to figure out whether theen-USTelligent Community 13Mon, 24 Aug 2015 13:33:05 GMThttps://devzone.nordicsemi.com/thread/31700?ContentTypeID=1Mon, 24 Aug 2015 13:33:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9d1f0763-fdb3-444d-8c03-b9594825141aStefan Birnir Sverrisson<p>1.20 V bandgap voltage should be at 25 deg C</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31699?ContentTypeID=1Sat, 22 Aug 2015 00:03:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bbd012d8-2f09-418e-b2ab-a5fbdb4d9c26diode<p>May I know under what temperature the internal bandgap voltage of 1.20V is specified? Thanks.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/31698?ContentTypeID=1Tue, 11 Aug 2015 14:11:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c94caab2-eb28-43a7-997c-48ecc81210a0Stefan Birnir Sverrisson<p>Hi</p> <p>In the nRF51822_PS v3.1, table 51, it is stated that the maximum voltage drift of internal VBG voltage is 200ppm per degree Celsius. That is voltage drift of 0.08% maximum for 4 degrees Celcius, which is 1024*0.0008 = 0,82 bit maximum difference if you are sampling with 10-bit resolution. So you could see a one bit change by changing temperature with 4 degrees Celcius, it would still be within specification.</p><div style="clear:both;"></div>