• State Not Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 125 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN65LVDM051: 100ohm Characteristic Impedance

Yazhu Liu
Intellectual 1410 points
Part Number: SN65LVDM051

Hi Team,

My customer is using SN65LVDM051 as LVDS signal transceiver, schematic as below. And they want to know what will happen without 100ohm characteristic impedance at receiver side? In real test they found that VID at receiver is ~3.3V, much larger than normal LVDS signal. Thanks.

Best Regards,

Livia

  • 0
    TI__Guru**** 158546 points

    Livia

    LVDS uses a constant current mode driver to obtain its many features. The transmission media must be terminated to its characteristic impedance to prevent reflections. Typically this is between 100Ω–120Ω and is matched to the actual cable impedance. A termination resistor is required to generate the Differential Output Voltage (VOD) across the resistive termination load at the receiver input.

    Thanks

    David