Part Number: TMS320F28388D
Hello,
We are currently facing an issue with sampling ADC channels on module C and D. For each module, we are sampling 1x channel at 12 bit resolution and 2x channels in differential mode at 16 bits.
There are 2 problems:
1) For module C, the channel sampled at 12 bits returns values in 16 bit...my guess is that the converter for the module is set to 16 bit regardless of which resolution we chose for the specific channel. The input voltage is read correctly and the rescaling the integer value to 16 bit solve the issue.
2) For module D, the ADC sampled at 12 bit returns incorrect results even after rescaling...the input voltage is read incorrectly and the signal responds slowly to the changes in input voltage.
FYI:
1) The acquisition from all ADCs is triggered by the same ePWM trigger at 20 kHz
2) ADC clock frequency = 40 Mhz
3) We are using programming the target in Simulink
Any suggestion?
thanks
Francesco
