Welcome to our forum! The problem you are having with the DAC8581 may be caused by a difference in ground potentials between the analog and digital portions of the device. Please tie the AGND and DGND together and let us know if that resolves the problem.
I have measured the potential and is of a few mV.
I try to follow your advice. If i put a SMD ferrite bead between two graund plane in order to avoid noise may be cause problemes? or it is useless?
Try a solder short between pins 5 and 6 to start with. Use a 0ohm resistor instead of FB between the ground planes.
I soldered a 0 ohm resistor between the two ground plans near the DAC but nothing has changed.Now i replaced the IC and it work fine, even if it becomes slightly warm.I'll try to see in the following days if it will burns or not....
After several weeks of perfect work
today the DAC became hot as before :(
So the problem is not solved
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