Hi Team,
We would like to ask your help regarding the customer's inquiry below.
I am using an f28379d control card to control the TIDA-010039, three stage, three phase SiC AC / DC converter. I program the MCU via Matlab Simulink and it works fine for me but I am having trouble reading the ADC's input voltage via USB. When I display the measured voltages on the PC via a USB connection, I have a noisy signal with around 100 bits, which means around 80 mV noisy signal (3.3 V reference). If I measure the voltage directly at the input pin of the control card or alternatively behind the integrated noise filter, I cannot see any noise. It's close to a perfect signal.
In my understanding the problem is located on the MCU. But if i use the control Cards docking station i there is no noisy signal to measure. It is perfectly what it should be. (Furthermore i choose a very long Acquisition Window for the ADC Measurement.. this should not be the problem)
In summary: The combination of TIDA-010039, F28379D Control Card and the USB connection to the laptop creates a noisy signal that I cannot explain. Can you help me please?
I have two pictures for a better explanation. The control card is integrated in the TIDA-010039. But as i explained, the voltage that i measured directly on the control card seems to be clean
Regards,
Danilo