Where to connect RFB = 200kΩ in the AD5933ebz,
As per the manual the RFB is connected between Pin4 and Pin5 of AD5933 but no pin outs are provided to connect the RFB.
RFB is used to set the gain of the current-to-voltage amplifier on the receive side. This is being provisioned by footprint labeled as CAL. You put the resistor you wanted on this pad in order to set the gain.
I will move your question to Direct Digital Synthesis (DDS). Someone there should be able to help you.
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