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AD5259 communication problem

Hi Engineering Zone,

I encountered the following problem when during my design. AD5259 digi-pot having communication issue with my LT IC. This happen when my ST Micro-controller was burnt during my testing adjustment and after i changed to another new ST Micro-controller IC. The problem solved after i replaced with a new AD5259. May i know what is the reason behind this? May i know is there any ways i can do rather than replace a new AD5259?

These happens 3 times and I had to replace the AD5259 every time to get the communication working.

Thank you in advance..

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