Hello @emomiilol ,

can you please share a set of all SW you are using for this test with its configuration?

The main reason can be the sampling rate of the A/D converter. For full resolution, there are 2-4 samples per second only. See excerpt from the MCP3422A0 datasheet:

4555e0bb-3fec-433f-a0a0-93b78197cae4-image.png