I have many (up to 16) 8-channel "buses" (not digital, but analog) each with signals which I want to read with a single 8-channel analog-to-digital converter (ADC). I would switch between these ~16 buses at about 1 Hz and measure their 8 channels simultaneously with the ADC card. I'm trying to find an IC that might do something like this.
I know there are many single-channel and dual-channel multiplexer chips available, but I'm looking for one that can switch between sets of eight. Is there any hope that such an IC exists that can do this? I realise such a chip could have hundreds of pins. The alternative is to wire up 8 of these single- or 4 of these dual-channel multiplexers in parallel, which will likely require many board layers to avoid overlapping copper traces.