Can I use ADG801to switch DC bias of Gain block?

Hi,

I am designing a RF transmitter/ receiver system. While in receive mode (which is default mode) all the RF devices (amplifiers) of the transmitter chain need to be in off state. They will be switched ON only when in transmit mode.

Generally I use MOSFET & BJT combination to switch the DC supply for RF devices (amplfiiers).

In case of gain amplifier (low RF power devices) I want to use ADG801 or similar device because this gain amplifier needs only 150mA (max) at 5.0V. ADG801 will help me in reducing the BOM as well as occupy less space & easy functioning.

Kindly give your suggestion on this approach.

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  • Hi Eric

    I checked "load switch" devices. These devices are good covering voltage as well as current requirements.

    But the turn-on / turn-off times are very high.

    I need turn -on time less than 5us where as Turn-off time can be 100us (approx).

    Considering Timing requirements can we select ADG801 for my application.

    Regards,

    Rajan

Reply
  • Hi Eric

    I checked "load switch" devices. These devices are good covering voltage as well as current requirements.

    But the turn-on / turn-off times are very high.

    I need turn -on time less than 5us where as Turn-off time can be 100us (approx).

    Considering Timing requirements can we select ADG801 for my application.

    Regards,

    Rajan

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