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,

    This amplifier is a wideband PHEMT based MMIC amplifier with P1dB of 20dBm (0.1Watt) RF power (minicircuit MNA-6A+). Yes I want to turn on/off the supply voltage of amplifier.

    Thanks for suggesting "Load switch" devices. It looks like load switch will be more suitable for this requirement as compared to Analog switch.

    Thanks & regards,

    Rajan

Reply
  • Hi Eric,

    This amplifier is a wideband PHEMT based MMIC amplifier with P1dB of 20dBm (0.1Watt) RF power (minicircuit MNA-6A+). Yes I want to turn on/off the supply voltage of amplifier.

    Thanks for suggesting "Load switch" devices. It looks like load switch will be more suitable for this requirement as compared to Analog switch.

    Thanks & regards,

    Rajan

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