Expand analog inputs

[embaro85]

Hi, I'm building an interactive table consisting of seventy-six individual capacitive sensors. By capacitive sensors I mean copper strip glued to a piece of a 3d printed part. I'm fine when reading a single analog signal but I can't find anywhere a solution to read 50+ analog signals. So far, I found the 74HC4051 chip, but it doesn't quite solve my problem. Any ideas or advice on the topic would be appreciated.

[bidrohini]

you can use multiple ADG52xx series multiplexer ICs to read 50+ analog channels. The ADG52xx series offers multiplexer ICs with a high number of channels, such as the ADG5236 with 32 channels. By utilizing two of these multiplexer ICs, you can effectively handle more than 50 analog input channels.

[Franco]

Are you designing a giant trackpad or a keyboard type of application? If keyboard, you can look at using multiple chips like this one
https://www.azoteq.com/product/iqs7222b/
It can handle 18 mutual capacitance inputs.

[embaro85]

I'll try first the ttp223 with a shift register first as is it seems the simples. If I can't extend the sensor working range enough, I'll try the other suggestions. Both are valid options in opinion and I'm thankful for the quick help.

Keep up the good work!