Consider the schematics below, the switching frequency is 250KHz, So, The cross over frequency be 250/5 = 50KHz. My ADC is able to sample at 1MS/s which is good as from the SNR perspective.Now, the doubts are below
For ADC selection-sampling rate the switching frequency should be considered while determining the sampling rate or the Cross over frequency ?
for the buffer used the Bandwidth should be 2 to 5 times the cross over frequency or the switching frequency?
In case i want to use current shunt amplifier for current sensing, How to select from the Bandwidth point of view ?
In general i wanted to understand how the Opamp parameter be looked at for converter design - unity gain BW, 3db bandwidth etc, used in control loop ?