Hi Arthur I have reviewed the schematic and It seems right. I think that It could be a noise issue with the analog interface. The connection between touch screen and the TSC is the key for the touch system performance and It should be kept as simple, as short and as secure as possible. Have you checked the noise levels in the analog interface? If the system has noise high levels you can have a look at the next application report: sbaa155a to find further information about as reducing analog input noise. Best Regards Jose Luis Figueroa Application Engineer
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