I would like to take full advantage of the ADC's input range while using the internal buffers.
I have configured the ADC to run from a single +3.3V supply.
If the internal buffers are turned on, the absolute analog input range become 0 to 2.2V.
If I use a 1.1V external reference, the ADC range will match the absolute analog input range.
I don't think I want to use a resistor divider off of the ADR441 to create a 1.1V reference.
Should I buffer this signal with an amplifier for the reference?