关于adm2483开机严重发烫问题

用adm2483加5v的1w隔离电源,进行485通讯,如图,用法按手册要求。现出现一个问题,而且是在不同产品的pcb板上都出现过,偶尔开机后,2483芯片非常发烫,不工作,甚至把芯片烧坏。重新开机又会正常。这个问题困扰了很长时间,不知原因,怀疑是不是芯片有问题,或者开机电压不稳造成。求助!

  • 0
    •  Analog Employees 
    on Jul 5, 2016 4:10 PM

    Hi,

    From my understanding of your query -

    1.

    You are seeing a problem at power up with the RS-485 communications bus.

    Is this correct?

    2.

    You need to perform a full power off/on reset to remove the problem on the RS-485 transceiver.

    Is this correct?

    Are there large motors in the vicinity or other equipment that is also switched on at the same time as the RS-485 transceiver?

    i.e. is the environment EMC harsh, and is this affecting the start up behavior of the RS-485 device?

    Best regards,

    Richard

  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:30 PM
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin