Hello, i bought an ECG 2 click board where the test signal looks ok, after that i made a custom PCB with the only diference that now AVDD = 3.3V, i tried the test signals in two of these custom boards and the signal have a big offset, you can see it in the images.
Why is this happening? The adquisition code and the configuration is the same in the two projects.
Test signal amplitude: 1mV
Test signal in custom PCB
Test signal in ECG 2 click
Registers Custom board Register ECG 2 click