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AD7147 Multiple cap sensors in one setup

Question asked by Kristof_Mulier on May 29, 2015
Latest reply on Jul 24, 2015 by Kristof_Mulier

I am using an AD7147 capacitive sensor chip to detect objects inserted between parallel plates. To extend the setup, I would need to use several AD7147 chips to do the job (each one can measure up to 13 channels). However, I am worried that the AC-shield line of these chips will not be synchronized. Is it possible to force the chips to run in sync? For example, connecting the AC-shield outputs of all chips, maybe with a resistor.

Has anyone tried something similar before?

 

Thanks a lot,

Kind greetings,

 

Kristof Mulier

Belgium

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