AnsweredAssumed Answered

Motor current acquisition ? SDADC or eQADC?

Question asked by Daniel Fernandes on Jul 4, 2019
Latest reply on Jul 8, 2019 by David Tosenovjan

Hi David Tosenovjan, Marketa Venclikova, Milan Brejl 

 

Together with Luca Barbiero For motor control purposes, we need to acquires 4 analog inputs at high frequency (40 to 60kHz). This analog inputs should ideally be triggered at exactly the same time

For such use case,NXP Application Note (AN 3206) isproposing to use eQADC to acquire the motor currents and then eDMA to transmit the values to eTPU function ASAC.

 

However, it seems the SDADC peripheral could be able to accomplish the same task... Is there any particular reason why eQADC is preferred in this case?

 

Is there any hints how to chose between one or the other? Do you know, In this case which one would give the better resolution for this use case? 

 

Many thanks, 

Daniel

Outcomes