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?
1. The circuit configuration looks correct.
2. How much capacitance is required for skin recognition. What type of skin recognition application are you working on? Are you looking for a proximity sensing application?. There is an application note available. https://www.analog.com/media/en/technical-documentation/application-notes/AN-1528.pdf