Using the AD8363 but am getting a logarithmic slope close to 40mV/dB instead of the specificed 52mV/dB. Could this be caused by leaving the TCM1 and TCM2 inputs floating. Is recommended to have these pins connected to some potential (table 4 page 18)? I don't need temperature compensation so I assumed that I could leave these pins floating. Are there recommended resitor values for a resistor divider to vref?
I think that it is safer to tie TCM1 and TCM2 to known potentials. Both of these pins pull bias currents. So the absence of an external drive source could cause the voltages to move to undesirable voltage levels.