I'm trying to use an ADS8504, a 12-bit ADC, and get as good a resolution as possible. The ADC accepts inputs in the range of +-10V.
However, my circuit is limited to only having a power supply of 5V via USB (I've already manage to produce a -5V source), as such, even though I'd want to amplify the desired signal to +-10V, the maximum I'll get is +-5V.
So my question is if there is any way to change the input range of the ADC so it will only consider +-5V as the conversion range. i.e: go from 10V being +2048 and -10V being -2048 to +5V being 2048 and -5V being -2048.
I've gone through the datasheet and haven't been able to figure out a way to do it. There is a part that talks about calibration, but I'm not quite sure if the trimming circuit provided does what I'm looking for or if it's for something else entirely.
If it is possible to remedy the same issue through software rather than hardware, it would also be good to know.
Any solutions are appreciated.