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Linearity in the regulation of the output level ADAU1701

Question asked by piero on Apr 10, 2018
Latest reply on Apr 11, 2018 by piero

Hello everyone,
In any laboratory, including mine, there is a Low Frequency Function Generator.

 

I needed a second generator to do some tests with 4 fixed frequencies and variable output level control, nothing refined or precise.

 

To not buy a second laboratory generator, I do not need it in the future, I built one using EVAL-ADAU1701MINIZ.

 

Everything works, but I can not have a linear output level adjustment.

 

Surely there is a method error but which one?

 

I attach the project and I hope someone will explain to me where the error is.

 

Thanks

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