In the AD8336 datasheet, page 20, figure 77 (simplified block diagram showing
Rfb1 is connected between GND and PRAO. Is that correct? I would assume the
connection to be between INPN and GND.
The connection should be INPN to GND (as in Figure 80). This have been reported
to the AD8336
applications engineer and we will have this figure corrected at the next
revision of the datasheet.