Hello,
I'm looking to use the ADS1232 to measure inputs from two full-bridge pressure sensors. I'm just a little confused about the function of the A0 pin and the filter settling time.
1. In the ADS1232 (not the ADS1234) does changing A0 select the differential input pair (e.g. low = AINP1/AINN1, high = AINP2/AINN2) or does it have a different function? This isn't entirely clear in the data sheet, which seems to me to say that only AINP is changed by changing A0.
2. If I want to measure from two full-bridge sensors 'simultaneously' (really interlaced) with SPEED=0 (10SPS), do I change A0, discard 5 readings and take the 6th (settled filter), then change A0 again, discard 5 readings and take the 6th etc... Won't my effective sampling rate per channel drop to 2SPS or worse?
I've attached a screenshot of my EAGLE circuit so you can get an idea of what I'm talking about. Note that I've tied A0 to DGND by mistake.
Many thanks for your help,
-Rob.