Where is mistake?
20 ohm Resistor between v+ and shunt or between V- and shunt could be damaged.
We are checking motor drive current by AD8211. Motor VCC 24V and GND (GND_Motor) is filtteres (Emifilter)
AD8211: V+ is connected 5V_CTRL (using cap 100nF / GND CTRL ) AD8211 GND is connected GND_CTRL.
Shunt resistor is 0.01ohm. Between Vin+ and Vin- line is Cap 1uF serial resitor foe both Vin+ and Vin- are 20ohm .
could GND of AD8211 be connected to the GND_Motor or GND_CTRL?
Now i found same problem again and seems that AD8211 is damaged and output voltage is too much, close to 5v
Those 20 ohm resistors were damaged as well. I changed resistors but output voltage was still too high.Seems that New Ad8211 helps, Reference voltage ls 3.3V in controller.