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THVD1450: internal resistor value of receiver

Ryo Akashi
Genius 9470 points
Part Number: THVD1450

Hello,

I have a question about receiver's internal resistor value.

This training video (https://training.ti.com/rs-485-overview

  • 0
    TI__Genius 9470 points

    Sorry, the question is not posted completely.

    RS-485 overview training video says that every RS-485's receiver has internal resistor for bias function and attenuation.

    In THVD1450 case, how much is the resistor value of internal resistor?

    Could you tell me how to calculate?

    Thanks and best regards,

    Ryo Akashi

  • 0 in reply to Ryo Akashi
    TI__Mastermind 25705 points
    Ryo,

    You can roughly use R1=240kOhm, R2=23kOhm, R3=15kOhm as the equivalent resistance. These values come from the IC design. Please let me know if you have more questions.

    Regards,
    Hao
  • 0 in reply to Hao L
    TI__Genius 9470 points

    Hello Hao,

    I understand.

    Thank you very much for your kind support.

    Best regards,

    Ryo Akashi