Questions on AN68403 PSoC5 ADC calibration | Cypress Semiconductor
Questions on AN68403 PSoC5 ADC calibration
I have read the application note AN68403 on the analog signal chain calibration.
Theoretically the offset of Delta-Sigma ADC should be constant across the full input range.
Based on the attached programm code, I found that this is not the case. The offset is the smallest around input range of 2-3V. At the range out of 2-3V, the offset becomes larger.
I am using the PSoC5 development kit CY8CKIT-050.
I modified the sample code found with AN68403.
Can someone please advise what went wrong? I need the offset of the ADC to be less than 2mV.