nRF52832 ADC precision

RE: nRF52832 ADC precision

Carsten Wulff — Mon, 08 Aug 2016 08:23:07 GMT

The temperature dependence depends on layout, but I would expect the relative accuracy to change little with temperature for the resistors. They are very close to each other, and will experience the same temperature, thus the relative change should be small.

RE: nRF52832 ADC precision

Andrea Gangemi (Flex) — Wed, 13 Jul 2016 12:09:49 GMT

Hi,

You mention that relative accuracy is between 0.1% and 1% How this relative accuracy change in funtion of temperature?

Thanks, Andrea

RE: nRF52832 ADC precision

Carsten Wulff — Tue, 10 May 2016 19:23:18 GMT

The internal reference impacts the gain error of the ADC, and the gain error is reported in the PS. The gain error includes the precision of the internal reference.

The variation of the absolute value of the internal resistor is quite large, usually in the 10% to 20% range. The relative accuracy betweeen the two resistors is very good, usually in the 0.1% to 1% range.