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AWR1843: AWR1843 LVDS Extension Redriver chip

QHLam
Prodigy 130 points
Part Number: AWR1843
Other Parts Discussed in Thread: DS92LV0421, DS25BR100, SN55LVCP22, DS25CP102

Hi, 

I am looking for TI solution to extend LVDS range from AWR1843 LVDS output to our custom LVDS receiver up to 5m. I have looked into parts such as channel link II devices like DS92LV411/LV412 or DS92LV0421/LV0422. Can you please advise if AWR1843 LVDS output is compatible with the above chip? If not, you please recommend an alternative solutions. 

Thanks, 

Quoc

  • 0
    TI__Guru*** 138329 points

    Hi,

    Due to local holidays we will get back to you early next week

    thank you
    Cesar

  • 0
    TI__Guru 58035 points

    Hello Quoc,

    These Link II devices are not compatible with AWR1843 LVDS o/p. You could at using LVDS buffers like "DS25BR100" which can drive signals over 10-20 m.

    regards,
    vivek 

  • 0 in reply to Vivek Dham
    Prodigy 130 points

    Hi Vivek, 

    Thanks a lot for your response. Your input is really helpful. 

    I am still in between of SN55LVCP22 (or SN65) vs DS25CP102 which has higher bandwidth. Can you please let me know if they have any compatible issues with AWR1843 LVDS o/p. 

    Regards, 

    Quoc

  • 0 in reply to QHLam
    TI__Guru 58035 points

    Hello Quoc,

    SN55LVCP22 seems to be an LVDS switch, i think what you need is LVDS buffer.

    Regards,
    vivek 

  • 0 in reply to Vivek Dham
    Prodigy 130 points

    Hello Vivek, 

    Is it possible to combine LVDS buffer and switch in one single design. Or the LVDS switch has already buffer capability. 

    I plan to put 2 sensors LVDS interface inside one board, the switch will help to select the LVDS channel to the output connector. 

    Thanks for your clarification!

    Quoc

  • 0 in reply to QHLam
    TI__Guru 58035 points

    Hello Quoc,

    Do you intend to use both the sensors at the same time? If yes that you would not be able to switch between the two. Also for long range data transfer you would need to ensure very clean layout routing and grounding. Having seperate buffers will ease that too. I would recommend using separate buffers for that two sensors . 

    regards,
    Vivek

  • 0 in reply to Vivek Dham
    Prodigy 130 points

    Hello Vivek, 

    Looks at SN55LVCP22 datasheet, I think it does support 1:2 splitter, 2:1 mux, 2:2 dual repeater or cross point. I may need upto 4x SN55LVCP22 to use both the sensors at the same time. 

    For long range data transfer, it will be better to have separate buffers. Thanks a lot for your recommendation. 

    Quoc