I am confused about the specification in the datasheet identifying the input ranges. The other posts on this component do not address this particular question on the topic. My application is a bipolar single ended signal which has a range of ±12V, common mode of 0V. Notwithstanding these values, I note that the input range for one of the PGIA settings is +/-20.48V. Why and how is this possible when the maximum input to the signal pins is 2.5V less than the supply rails? (Datasheet pg 3) These supply rails are limited to +/- 16.5V in the absolute max. (Datasheet pg 9) That would suggest that the absolute maximum is +/- 14V for signal inputs. Nominally, these max values would be +/-12.5V based on a +/-15V power supply input. My hardware is designed and I am designing my VHDL to interface while I wait for the hardware to arrive. If I need to modify my hardware, it would be nice to know before it arrives so that I might have the chance to make necessary modifications.
Based on, say the PGIA setting for a 20.48V which best matches my input range, where does my input value saturate? At +/-12.5V? How would a +/-20.48V range be supported in this case without the ESD diodes conducting?