My sensor have capacitance from 142 to 168 pF diapason, maximal supply voltage <12 AC, alternating signal without DC bias . Measurement frequency 10 kH.
Analog Devices Capacitance to Digital converters already include the excitation circuit.
Depending on the capacitance range you can use it as is or follow the example of CN0129 to extend the range.
CN0129 Circuit Note | Analog Devices
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