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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  • 0
    •  Analog Employees 
    on Dec 3, 2015 5:48 AM

    Hi,

    You mentioned when power on the ADuM1201, interference will not happen. But set the input to high, interference will happen. One thing is that if you power on the ADuM1201, the chip will transfer data internal whatever you give the input or not. So I could not judge if the ADuM1201 affect your system.

    I think you can do one experiment is romove ADuM1201 and short the input and output directly. Then let your system work to see if there is interference.
    And how do you power the RF reciever module? And how do you power the CAN communication PCB? Do they power respectively?

    Thanks.

    Jian

Reply
  • 0
    •  Analog Employees 
    on Dec 3, 2015 5:48 AM

    Hi,

    You mentioned when power on the ADuM1201, interference will not happen. But set the input to high, interference will happen. One thing is that if you power on the ADuM1201, the chip will transfer data internal whatever you give the input or not. So I could not judge if the ADuM1201 affect your system.

    I think you can do one experiment is romove ADuM1201 and short the input and output directly. Then let your system work to see if there is interference.
    And how do you power the RF reciever module? And how do you power the CAN communication PCB? Do they power respectively?

    Thanks.

    Jian

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