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HMC624A

I would like to have definition of the Return Loss Input and Output parameter for the variable attenuator.

I have also another question:

The spec for P0.1dB at VDD= 3V, over temperature and frequency is better than 33dBm in table 1,

but it looks much worse on figure 21.

which is it? 

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  • Return Loss Input is the reflection parameter (S11) measured at the attenuator input pin (ATTIN). You see the input return loss for the selected states.
    Similarly, Return loss Output is the reflection state for the RF output (ATTOUT) pin .

    There's a mistake in Table 1 regarding P0.1dB values (3V and 5V swapped). The correct values are below.

    P0.1dB @3V = 27 dBm
    P0.1dB @5V= 33 dBm

    Best regards,

Reply
  • Return Loss Input is the reflection parameter (S11) measured at the attenuator input pin (ATTIN). You see the input return loss for the selected states.
    Similarly, Return loss Output is the reflection state for the RF output (ATTOUT) pin .

    There's a mistake in Table 1 regarding P0.1dB values (3V and 5V swapped). The correct values are below.

    P0.1dB @3V = 27 dBm
    P0.1dB @5V= 33 dBm

    Best regards,

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