So my equation turns into [(Vin-Vref) * R2/R1] + Vref?16.06 is correct. Just think about - you have a lower voltage at negative output - so therefore the output voltage HAS TO BE higher than Vref.
Because Vin is an inverting input it's actually [-(Vin-Vref) * R2/R1] + VrefSo my equation turns into [(Vin-Vref) * R2/R1] + Vref?
The OP279 has Voh of +4.8V and Vol of 75mV. I can't find the Voh or Vol on the datasheet of the OPA2340.Have you compared, on their individual datasheets, what is the Voh for each device with a load of well over 10 mA?