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Questions on pins MIX_I, MIX_Q, FILT_I and FILT_Q for ADF 7020

Question asked by grit_fire on Mar 17, 2014
Latest reply on Mar 17, 2014 by rbrennan

Dear Sir/Madam,

 

My primary goal is to find the phase information of the received signal using a quadrature demodulation architecture receiver/transceiver. Therefore the signals I am most interested in are the I and Q signals at the output of the two down-conversion mixers since phase=arctan(Q/I) if my understanding is correct. From the data sheet of ADF7020, I learned that there might be several pins related to I and Q signals, i.e. MIX_Q, MIX_I, FILT_I and FILT_Q.

 

I wonder which pins I should use to fulfill my purpose here? Will I be able to obtain DC values for I and Q signals here?

 

Also, the datasheet indicates that these pins are high impedance pins and should be left open, how can I be able to monitor the signals from those pins?

 

Thank you so much in advance.

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