I've never used a bipolar ADC before, so I have a pretty easy question about it. I've skimmed over the datasheet and some references to Vref, but not enough to explain what my output codes are.
I'm looking at the ADS1282 ADC and I can set Vref (REFPx and REFNx pins) to essentially whatever I want within the limits of my supply.
For the purpose of understanding what happens, neglect any common mode input range, gain and other stuff. Lets say, I have an 8bit ADC +/- 2.5V bipolar supply with a Vref of 2V. If my input is 1V, what is my output ? If my input is -1V, what is my output ?
Would it be +128 for Vin=1 and -127 for Vin=-1 ?