Hi,
I am already planning to use AMC3301 for the phase current shunts, but i wish to extend them also for voltage measurment of the dc link positive and negative with respect to NP midpoint.
Would this be OK way to construct this? (measuring dc+ and - in simulation but would adjust for + to np and np to -)
full scale range 0-3.2V (100mV rail offset) i would go with a diff-to-singel stage op amp with scaling 3.2/2.05 as a simulated.
But i guess it also would be ok to just use the output positive and live with 1.44 offset voltage and read the +1.025V as the range for the bus voltage?
Scaling would be roughly 0.4V per bit in the ADC (12bit) if i calculated correctly.
i need no CM offset on the differential to singel ended stage because the voltage should never go "negative"
Then calculate NP in software by subtracting UDC+ and UDC- ?
Any tips & tricks appreciated.
edit: **made edits to better clarify**
