Regarding the noise about the AUDM1201

When I add one external CAN communication PCB used IC  AUDM1201 isolation  TX and RX  into the RF receiver moudle,The RF receiver range become shorter. I check it is the IC AUDM1201 problem. I want to  how to aviod the ADUM1201 noise effection . the below sch is Audm1201 isolation.

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  • Thank you for your reply, The attached picture show our PCBAS position. Because our project is 2.4G RF receiver, when i add the small PCB about CAN communication (have IC ADUM1201) ,Then the receiver RSSI drop 6DB and the range is shorter.

       By the way, if the IC ADUM1201 only connect the VDD1 and VDD2,the interference don't happen.But the VDD1 and VDD2 is on ,only set hight on  Via(7) pin or set hight on Vib(3) pin, the interference happen

     

    @

Reply
  • Thank you for your reply, The attached picture show our PCBAS position. Because our project is 2.4G RF receiver, when i add the small PCB about CAN communication (have IC ADUM1201) ,Then the receiver RSSI drop 6DB and the range is shorter.

       By the way, if the IC ADUM1201 only connect the VDD1 and VDD2,the interference don't happen.But the VDD1 and VDD2 is on ,only set hight on  Via(7) pin or set hight on Vib(3) pin, the interference happen

     

    @

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