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AD7151 as a human body sensor

My client wants to use the AD7151 in skin care equipment.

He wants to use it as a standalone (olny ues out signal), with two questions:
1) If it is configured as below figure for skin recognition, can it be used without additional tuning?
2) How many farad capacitors should I use for Csens? Or do you only need to provide two electrodes?

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