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SN65LVDS100/101 Transmission distance

Shibuya
Intellectual 2985 points

Other Parts Discussed in Thread: SN65LVDS100, TLK6201EA

Hi,

I'd like to know transmission distance of SN65LVDS100/101 (or LVDT) via cable for 750Mbps/１Gbps/1.5Gbps/3Gbps data rate. Have you ever evaluated it?  If you haven't  could you give me approximate value?

Best regards,

Tetsuro

  • 0
    TI__Intellectual 1810 points

    Hi Tetsuro,

    What kind of cable they would like to use? Will the same device be on both ends of the link (i.e. transmitter and receiver)?

    Best regards.

    Hassan

  • 0
    TI__Intellectual 1810 points

    Hi Tetsuro,

    I've attached a report with some results I measured in June last year with the LVDS100 and also the TLK6201EA at 1.5Gbps and with Cat5E cables. I hope the report will give the customer some idea of the device capabilities and some configuration options.

    Please let me know if further information is needed.

    Best regards.

    Hassan.

  • 0 in reply to HA
    TI__Intellectual 2985 points

    Hassan,

    Thank you very much for the data.  I beleive it is one of example to give some ideas to the cusotmer.  However it turend out that the customer planed to use Cat. 7 cable, it should have better performance than Cat. 5E.  For my understanding the transmission distance is really depend on cable structure and isolation dielectric as well as data rate. But I can not explain it theoriticaly and estimate how much distance the customer can gain with Cat.7.  Could you give me any idea or hint how I approch to the customer with the Cat. 5E data.

    Best regards,

    Tetsuro

  • 0 in reply to Shibuya
    TI__Intellectual 1810 points

    Tetsuro,

    Due to Cat7's lower attenuation and much better attenuation-to-crosstalk ratio (ACR) , I'd say approximately 20% longer Cat7 cable can be supported compared to Cat5E. Unfortunately we do not have Cat7 cables here in our lab so I cannot make measurements.

    Best regards.

    Hassan.