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ADG936 at 6 GHz

Hi!

I would like to connect the ADG936 switch with the ADL5375 and ADL5380. I would like to use the whole range of this two mod/dem devices (up to 6 GHz). and I want to adaptate two specific filters, and switch between them with the ADG936 switch. In another discusion, they told me to use this switch if the source has enought power at the desired frequency to comply with the minimal of the ADL5375/80 (-6dBm). The problem is that I can't see in the graphs of the ADG936 the losses at 6 GHz and I cannot know the minimal power output that I need in the synthethizer source.

Could someone tell me the instertion losses at 6 GHz in the ADG936?

There is any other problem asociated?

  • Hi Zartagal,

    We don't specify the operation of the ADG936 up at 6GHz but I just did a quick check using the ADG936 evaluation board and a VNA.  It is coming in at approximately 8.5dB for insertion loss at 6GHz.  The roll off is very high at these frequencies so there would be significant variation in insertion loss at 6GHz.

    Points worth noting about the ADG936 switch are its operational Vdd range is from 1.65V to 2.75V and it has a max power handeling of 16dBm.

    Eric.

  • Moving this question on ADG936 to the Switches/Multiplexer Community.

  • Hi Zartagal,

    I don't have detailed evaluation data from 4GHz to 6GHz but in general the insertion loss decreseas as you move lower in frequency.  Sorry I don't fully understand your 1st questions, gave you give more detail, thanks.

    Regards,

    Eric.

  • Do you think I should take into consideration any other question about the switch, or, if I just have enought power in the transmission synthetizer it would just work correctly at 6GHz?

    So, if my source is a sinusoidal signal at 6 GHz with +5dBm power output and the receiver need -6dBm as minimum, with a losses of 8.5dB in the switch (5-8.5 = -3.5dBm > -6dBm) it should work, isn't?

    Do I have to consider anything more?

  • Hi Zartagal,

    The switch can potentially operate at 6GHz but at this frequency you are outside the scope of the datasheet and the characteristics of the switch are not defined, e.g. P1dB performance.  At 6GHz the IL could change significantly from part to part.  Note at these high frequencies the 50ohm properties of the switch would not be ideal anymore, the return loss would be high (~10dB) and the off isolation low, this could affect other circuitry connected to the switch. I hope these comments help.  

    Regards,

    Eric.