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DS3695A: About communication distance.

Guru 10385 points

Part Number: DS3695A

Hi team.

I'd like to extend the communication distance.

Do you have any information about the relation between communication speed and cable characteristics ?

I need a figure between the communication speed and cable Insertion loss.

Like this.

Sincerely.

Kengo.

  • Hi Kengo,

    The relationship between maximum cable length and data rate of an RS485 system is more characteristic of the RS485 standard than the specific device being used. Though your choice of device will have some impact on what the system can achieve (especially the maximum data rate possible), the general trend follows the graph you shared pretty consistently (where line length [m] times the data rate [bps] should be < 10^7 conservatively). More information can be found in section 9 of this design guide:

    http://www.ti.com/lit/an/slla272c/slla272c.pdf

    Do you have a specific speed or cable length you are trying to achieve? 

    Regards,

    Eric