Thanks for reply Giovanni,
I would like to reach at least 10KHz. That would be very nice result compared to my current results which is 1-Miliseconds. Could you please give me some tips what I could apply to my setup to reach 5-10Khz almost 0.1 miliseconds ...if I am correct.

Thanks in advance

Hello Giovanni, thank you so much for updating the schematics. I'm building a PID controller with Arduino Due revision 3.0. In my experiments with setpoint and input value, I get about 1-milisecond response time, it means when the setpoint changes the system needs at least a 1 miliseconds to equilibrate. Do you think with Due it is possible to reach even faster response times???. Let's say microseconds? etc.....

Hello Giovanni, hope your'e enjoying holidays..
I was analysing the Due Bipolar Dac output brojet on you website. I was trying to build the same, but it looks like the main schematics is too small, so it is very hard to read it... Any chance you could send me a picture of schematics of the circuit (figure 7, the complete circuit scheme), with better resoltuon. My email zombie22333@gmail.com. THank you in advance

Merry Christmas