I have a trace which powers an external device and with a large size because it carries a relative high current (more than 1A).
Along this trace I have a small value resistor to monitor the flowing current.
The resistor is connected to an ADC to measure current. The traces between the resistor and the ADC can be smaller than the power traces because not much current flows there.
I am not able to use two different net classes for the power trace and for the ADC traces. A soon as I change the class of the power trace, the sensors traces get the same net class and viceversa.
I have also tried to put a 0 ohm resistors along the sensor traces but this doesn't help neither.
Can anyone help me with this issue?
Thx