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PSoC™ Creator & Designer

ETRO_SSN583
Esteemed Contributor

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

   

 

   

Regards, Dana.

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ETRO_SSN583
Esteemed Contributor

The project is CE52126, typo in my prior Title entry.

   

 

   

Regards, Dana.

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