I'm using the LTC2308 ADC in a design. It looks like, from the data sheet, the ADC is biased and works from 0 to 4.096V when the Vref and Vrefcomp pins are ONLY bi-passed. I'm not using them for an external voltage reference. I want to use the internal voltage reference. When I test this in the lab my readings max out at ~2.0V. So, in other words, when I read from a single ended channel by sending the command 0x900 and the input is 2V I get 0x7FF which I'm assuming is the maximum signed result. From the datasheet, it looks like the ADC is actually biased with the 4.096 voltage from the amplifier/buffer in the diagram.
Long story short, what voltage is the actual ADC using as a reference if I don't provide an external one?