A couple of issues that need addressing -
1) Global properties, the OpAmp Bias and Ananlog Buffer properties both were set to low power,
so sine wave distorted. Those should be set to high power.
2) Because the A Buffer is not R-R, its exacerbates the distortion of the DAC output when close to either
rail. Maybe a note should be added to ap note covering this.
3) As an exercise, to eliminate the distortion in 2), I added a PGA, set its G < 1, to get waveform away
from rails, and woulnd up with a highly distorted waveform, ? Not sure why.
Note A Buffer was only loaded with 10M scope probe in all observations, maybe in case of 2) high load
might actually improve output distortion.....?
PSOC Designer 5.4
The project is CE52126, typo in my prior Title entry.