I've just started reviewing the PSoC Analog Coprocessor as want to use it with a pyroelectric sensor for motion detection, but wondered whether I can attach multiple PIR sensors to the chip directly as it appears that the CY8C4Axx chips have multiple opamps. If so what is the maximum number of sensors I can attach and what is the limiting factor (e.g. number of opamps or some other constraint on the chipset).
Welcome in the forum.
When you built the project for 1 sensor you can estimate for yourself: on the very right hand side of the Creator 4.0 window is a tab named "Resource Meter". Here you can see how many resources your current project consumes and how many remain.
That Resource Meter side tab is very helpful (never spotted that before). Looks like the 1.2V Vref generator needs to use an OpAmp resource too. So 3 out of 4 already used. Why is that.