In the AD7746, is there a way to convert the voltage input VIN to a capacitive input CIN. That the IC can function as an input for 3 capacitors instead of 2. Since it goes to the same multiplexer.
its not possible to do that, we measure the charge by providing excitation for capacitance measurement. Have look at CDC basics to check how its measured
ADI Capacitance-to-Digital Converter Technology in Healthcare Applications
Let me know incase you any queries
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