https://devzone.nordicsemi.com/f/nordic-q-a/108072/behaviour-of-offset-auto-calibration-started-by-triggering-calibrateoffset-task-of-saadcHello, In the current datasheet (section 6.23), I could not find a description of what the offset auto-calibration actually does and what the precise timing is (trigger of task CALIBRATEOFFSET to CALIBRATEDONE event). However, there are several documenteden-USTelligent Community 13Thu, 08 Feb 2024 13:08:03 GMThttps://devzone.nordicsemi.com/thread/468063?ContentTypeID=1Thu, 08 Feb 2024 13:08:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b25ca8f4-0fcd-4b6b-b273-c73451387c13Susheel Nuguru<p>No problem, can you closed this thread as verified Daniel?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/468048?ContentTypeID=1Thu, 08 Feb 2024 12:30:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:da08c21b-e45c-4073-8d9b-1c8faba57d75daleit<p>Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/468044?ContentTypeID=1Thu, 08 Feb 2024 12:21:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a948a68a-7df4-4a4e-9928-08fe129e77f9Susheel Nuguru<p><span>Here is the description of the offset auto calibration.</span></p> <p><span>The auto calibration coding uses the&nbsp;exact the same methodology as you mentioned here. The algorithm shorts the differential input signal pair before reading and getting subtracted from the result in the ADC to get the calibration value. </span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/467836?ContentTypeID=1Wed, 07 Feb 2024 07:45:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:95d0c7bf-d843-4d26-8368-91397e3d2bf1Susheel Nuguru[quote user=""]My questions: Do I assume correctly that the offset auto-calibration of SAADC just does a conversion with the sampling capacitor internall shortened and subtracting that conversion result from subsequent conversions?[/quote] <p>No, I do not think we can assume anything here.&nbsp; There are some internal resistors in SAADC, these<span>&nbsp;resistors get normally connected during the SAADC sample only, These resistor string have a DC offsets written into them and that needs calibration..</span></p> [quote user=""][212] Events are not generated when switching from scan mode to no-scan mode with burst enabled[/quote] <p>Not sure how this is connected to the calibration functionality?</p> [quote user=""]In other words: Given I have a spare differential channel, does offset auto-calibration give me any benefit over measuring the differental voltage at a shorted differential input signal pair before each real acquitition of the differential input voltage at a different input signal pair?[/quote] <p><span><span>This is a very good question. I do not know, I am asking/writing the Analog engineers and will come back to you when I have some insights from them.</span></span></p><div style="clear:both;"></div>