Hi wierd_dave
so I've attached the Tp(V) maths figures as reqeusted. Also one figure is the actual raw data from (adc). One can see the noise level. The Graph represents the both measurements on same scale (Volts), the Agilent multimeter, and the Due SAM MCU. I have also atached the PWM voltage curve measured directly on pin, just to have an idea how much analogWrite() argument represents in voltage. The data calculation took a while coz I did a lot of calculations ot make sure the data is resonable. By the way, i used the analogReadresolution(12)-(16) to increase the default-10 :o , but it looks like the Due did not change the resolution, even tho i added this in my code, it kept reading from 0-1023. Any ideas on that=? 
