https://devzone.nordicsemi.com/f/nordic-q-a/17904/internal-reference-voltage-stabilityHi, In ADC, we would be using the internal voltage generator as the reference voltage. How stable is the voltage coming out of the reference generator. Would it be always be say 1.2V or change depending on some noise factors.en-USTelligent Community 13Tue, 22 Nov 2016 10:07:34 GMThttps://devzone.nordicsemi.com/thread/69041?ContentTypeID=1Tue, 22 Nov 2016 10:07:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:98f8b8bb-3249-4db9-8b7f-41ce52e30759J&#248;rgen Holmefjord<p>Hi,</p> <p>From chapter 8.12 - Analog to Digital Converter (ADC) specifications in <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/pdflinks/51822_ps.html?cp=3_4_0">nRF51822 Product Specification v3.3</a>, the internal reference voltage is specified:</p> <p><img src="https://devzone.nordicsemi.com/cfs-file/__key/communityserver-discussions-components-files/4/vref_5F00_spec.png" alt="image description" /></p> <p>You can also have a look at <a href="https://devzone.nordicsemi.com/question/3512/adc-reference-selection-nrf51822/">this answer</a>.</p> <p>Best regards,</p> <p>Jørgen</p><div style="clear:both;"></div>