Single-Ended Operation for ADL5390

I am considering the ADL5390 for some RF vectorial signal tuning operation.  I would prefer working with single-ended signals instead of diffrerential signals; I read on the product info that single-ended operation is supported.  In this case how to I connect to the input, control and output ports?  (For example, do I connect my single-ended signal to the "p" ports and ground the "m" ports?)

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  • Hi Alex.

    the ADL5390 is an RF/IF Vector Multiplier. Being such, the component needs a Vector input and will deliver a Vector output. As you are fully aware, this vector needs both an I and a Q component. The ADL5390 has a useful feature where you can deliver both the I and the Q signals in a differential form.

    If this type of signal input is not needed or convenient, the user can deliver the I and Q signals in a single ended fashion by capacitive coupling the INMI and the IPMQ input to ground.

    this procedure is explained within the datasheet. If you need to deliver the signal to the entire circuit in a single ended form, you could follow the procedure explained above in figure 29, then use a balun to deliver the single ended RF signal to this circuit. Be sure to choose a balun to cover your input bandwidth. the ADL5390 overall input bandwidth is 20MHz to 2.4GHz. Figure 29 also show how to combine the output back to single ended.

    I hope this helps.

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  • Hi Alex.

    the ADL5390 is an RF/IF Vector Multiplier. Being such, the component needs a Vector input and will deliver a Vector output. As you are fully aware, this vector needs both an I and a Q component. The ADL5390 has a useful feature where you can deliver both the I and the Q signals in a differential form.

    If this type of signal input is not needed or convenient, the user can deliver the I and Q signals in a single ended fashion by capacitive coupling the INMI and the IPMQ input to ground.

    this procedure is explained within the datasheet. If you need to deliver the signal to the entire circuit in a single ended form, you could follow the procedure explained above in figure 29, then use a balun to deliver the single ended RF signal to this circuit. Be sure to choose a balun to cover your input bandwidth. the ADL5390 overall input bandwidth is 20MHz to 2.4GHz. Figure 29 also show how to combine the output back to single ended.

    I hope this helps.

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