Missing decoupling capacitors from ERTEC's (IC16) analog power supply pins
According to the datasheet, the 5 pins depicted below should have 10-22nF decoupling capacitors mounted as close as possible to them.
![2021-03-17-123313_246x131_scrot](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)
Then, apart from the 0.1u that are placed, 22uF caps should be also added to P1V5A and P3V3A (p. 39).
![2021-03-17-123727_413x134_scrot](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==)