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AD5933 Synchronous Demodulation

Question asked by richeekdey on May 13, 2018
Latest reply on May 14, 2018 by richeekdey

Upon having looked at the datasheet and the AN1252 application note; I cannot seem to find a relationship or info about synchronous demodulation related to the AD5933. I know AD5933 works on the principle of synchronous demodulation; so can someone shed some light about this? Which part of the AD5933 exactly is the synchronous demodulation part?


From what I have been able to understand, the DFT MAC core essentially works as a synchronous demodulator. The input signal from the ADC is input into the MAC core which also gets a reference signal from the DDS. It then performs synchronous demodulation (as shown in the figure) to obtain the signal of interest. Is this reasoning correct?