I'm just building my first separate ADC circuit, after deciding Arduino was limiting me too much / it is just time to start understanding how to do things properly.
I currently am using a LT1290 ADC with a LT1027 5V reference. I have essentially stuck to exactly the example circuit given in the data sheet to get started, it is what I need anyway. I am currently sticking with single-inputs.
I was just wondering if by re-scaling my input signal from 0to5V to -5Vto+5V, and feeding this in as a differential input, is this an easy way of doubling the resolution (2 x 4096)? Or is there a high price to pay in accuracy compared to the increased complexity of the needed circuit?