https://devzone.nordicsemi.com/f/nordic-q-a/95694/trying-to-understand-saadc-changesHi, We are developing an application with BLE and ANT+, we made a custom board with nRF52832, SDK 17.0.2, s332 7.0.1, and we are using two channels for measuring the battery level and strain gauges. The battery measurement is working fine, but ween-USTelligent Community 13Mon, 16 Jan 2023 07:38:24 GMThttps://devzone.nordicsemi.com/thread/404939?ContentTypeID=1Mon, 16 Jan 2023 07:38:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2d6fa89a-d4dd-4f6b-8b52-778ac136879fKarl Ylvisaker<p>Hello,<br /><br />There is going to be a few LSB of fluctuation, but there are things we could try out to make the readings more accurate.<br />For instance, what is the voltage range of the measured signal?<br />If you could reduce <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html#concept_kxz_4pp_qr"><em>the input range of the SAADC</em></a> to match the range of the signal as close as possible you will significantly reduce the influence of the fluctuating LSBs on your measurements.<br /><br />You could also enable <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/saadc.html#saadc_operationmodes_oversample">OVERSAMPLING </a>+ BURST which will even out any white noise on your measurement.<br /><br />I do not think that thermal compensation should be necessary here, unless the ambient temperature in your office/operating area changes significantly between the days you have performed the calibration on.<br /><br />Lastly, which load cell configuration have you got? Is it a single load cell, or a network of 4 or more for instance?<br />When you performed the calibration prior, how many samples did you take to arrive at the value for 1 kg?<br /><br />Best regards,<br />Karl</p><div style="clear:both;"></div>