I'm having a problem with my ADC LTC2368-24 that every time the CNV signal goes high, some spikes were induced on the inputs. Thus when no signals present at the input, in which the ADC's output should be close to 0, the ADC converts the spike signals and offset my data.
This is my schematic. I have tried different RC filters combinations, different caps values and materials,but nothing seemed to resolve the issue
This is what it looks like on the scope. The purple line is the CNV signal and the yellow line is the analog inputs to the ADC. Please help, I would really appreciate any feedback.