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ADL5811 connection with ADL5387

In our design, we need to use both ADL5811 and ADL5387 evaluation board. Firstly, we would like to use ADL5811 evaluation board to convert the measured signal to an intermediate frequency IF. Then this IF signal is mixed down to I and Q signal by ADL5387 evaluation board. Thus, we connect the IFOP port of ADL5811 to the RF port of ADL5387. Unfortunately, we found the issue for this connection. When we added the power supply to ADL5811 evaluation board, this caused the short path between the power supply and ground of the ADL5387 evaluation board. Would you please help us resolve this problem? Can we directly connect ADL5811 and ADL5387 together?

 

Thanks.

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  • Hi, Jiwei,

        The demodulators should be selected based on your frequency range and signal dynamic range requirements.  RF/IF demodulators are listed on the following web page:

      RF Modulators | RF Demodulators | Analog Devices

    But be careful because some modulators are mistakenly listed on the Demodulator Table also.  All these demodulators can be used with active mixers through ac coupling.  Some have single-ended 50-ohm inputs, while others may have 200-ohm input or differential inputs.  Balun transformers can be used to interface between devices with different impedances, as well as between single-ended and differential products.

    Benjamin

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  • Hi, Jiwei,

        The demodulators should be selected based on your frequency range and signal dynamic range requirements.  RF/IF demodulators are listed on the following web page:

      RF Modulators | RF Demodulators | Analog Devices

    But be careful because some modulators are mistakenly listed on the Demodulator Table also.  All these demodulators can be used with active mixers through ac coupling.  Some have single-ended 50-ohm inputs, while others may have 200-ohm input or differential inputs.  Balun transformers can be used to interface between devices with different impedances, as well as between single-ended and differential products.

    Benjamin

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