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ISO3080: How would this part perform in high noise environments over short distances?

Lauren Mayfield
Expert 7985 points
Part Number: ISO3080
Other Parts Discussed in Thread: ISO1410

Hi ISO team,

How do you think this part would perform for high noise environments over relatively short distances (5-15 devices all within 10ft of each other)? Is there another part you would recommend in place that is more targeted towards this kind of environment?

This is for a 24-S Li-ion battery pack.

Thanks,
Lauren

  • 0
    TI__Expert 6195 points

    Hi Lauren, 

    RS-485 in general is a pretty noise immune communication system - especially common mode noise. It really depends on what kind of noise you have in your system.

    • Common mode noise will be reduced because of the differential signaling. Also the ISO3080 and other isolated RS-485 transceivers have a large common mode voltage range on the transceiver (-7V to +12V).
    • Differential noise can be reduced by using twister wire pairs. 
    • If CMTI is of concern, you could upgrade to the ISO1410, which is pin-to-pin compatible with the ISO3080 but also has 100kV/us typical CMTI. 
    • Ground shifts can be reduced by using isolated parts like the ISO3080 or ISO1410. 

    Both the ISO3080 and the ISO1410 should do well in noisy environments. I would probably go with the ISO1410 because of the higher CMTI rating. 

    Best regards, 

    Dan