output resistance is causing gain error and common-mode rejection error.
Is there anything I can do to add high input impedance to my single-ended to
differential conversion stage with AD8476?
In order to achieve high input impedance, a precision op-amp, such as the
OP1177, can be used to buffer the input voltage. Further improvements can be
achieved by placing AD8476 within the feedback loop of the op-amp. For more
information, consult the following article: