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SN65LVDS047: additive jitter spec

Kazuhiko Hirano
Genius 13158 points
Part Number: SN65LVDS047
Other Parts Discussed in Thread: DS90LV047A, SN65LVDS31

Tool/software:

Hello,

At SN65LVDS047, how much ps is the additive rms jitter spec in 10KHz to 20MHz offset range?

Best regards,

K.Hirano

  • 0
    TI__Genius 14661 points

    Hello,

    It doesn't appear that this metric was characterized on the SN65LVDS047. However, the SN65LVDS047 is the Texas Instruments equivalent of the DS90LV047A and can used as a reference point.

    This application note (How Far, How Fast Can You Operate LVDS Drivers and Receivers?) breaks down jitter measurements at 5%, 10%, 20% as tested bench level on the DS90LV047-48A EVM. If you are looking for say, a 5% jitter tolerance, see the “48” column of Table 1. This table does a nice breakdown of comparing other devices tested (DS90LV011/12A, SN65LVDS31/33, DS90LV047/8A). 

    Jitter tolerance is system dependent. In standard applications exceeding 20% jitter tends to close the eye diagram and corrupt the data. The DS90LV047A was characterized with 20% jitter. The datasheet provides an overview section (9.2.2.2) of the test procedure (and results at 20% jitter, Figure 16).

    Thanks, 
    Amy

  • 0 in reply to Amy
    TI__Genius 13158 points

    Amy,

    Thank you very much for your responses.
    I am sorry I forgot to mention my customer’s app. They use SN65LVDS047 as a clock driver for ~100MHz clock, not data transmission. So, they would like to know how much rms jitter would be added in 10KHz to 20MHz offset range. Do you have any data on this?

    Best regards,

    K.Hirano

  • 0 in reply to Kazuhiko Hirano
    TI__Genius 14661 points

    Hello,

    Unfortunately, we do not have data on this device as it relates to additive jitter. However, from the results in the application note post above, it would be reasonable to infer that the additive jitter would be on the order of a few hundred pico-seconds, also suggested in this E2E post: (+) SN65LVDS31-EP: Jitter specification - Interface forum - Interface - TI E2E support forums.

    Thank you,
    Amy