I'm using an AD4112 for measuring +/-10V signals.
I plan on using:
Onto the questions:
1a) If I use single-ended mode, can I get a true +/-10V bipolar signal in? This would be the same as Figure 1b in this document, is that correct? https://www.analog.com/media/en/technical-documentation/product-selector-card/2pb_sarinputtypesfb.pdf
1b) In single-ended mode, the signal is VINx-VINCOM for each channel. Is this correct?
2a) Do we need isolation like the ADuMxxx (from the evaluation board) if the analog signal's electronics are also on the same ground as our electronics? In this case, VINCOM = AVSS = DGND = 0V.
2b) When do we need to use DC/DC isolation for this chip? Under what conditions?
3) If AVSS = DGND, do they need to be connected in a "star configuration" or "star ground" layout? Or can they just be directly coupled to each other? On the evaluation board it looks like the DGND and AVSS are connected simply with a via.
Thanks in advance.