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DS90CR483A_15 Datasheet, PDF (10/27 Pages) Texas Instruments – 48-Bit LVDS Channel Link SER/DES - 33 - 112 MHz | |||
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DS90CR483A, DS90CR484A
SNLS291A â APRIL 2008 â REVISED APRIL 2013
www.ti.com
C â Setup and Hold Time (Internal data sampling window) defined by Rspos (receiver input strobe position) min and
max
TPPOS â Transmitter output pulse position (min and max)
RSKM ⥠Cable Skew (type, length) + LVDS Source Clock Jitter (cycle to cycle) + ISI (Inter-symbol interference)
⢠Cable Skew â typically 10 ps to 40 ps per foot, media dependent
⢠TJCC â Cycle-to-cycle LVDS Output jitter (TJCC) is less than 100 ps (worse case estimate).
⢠ISI is dependent on interconnect length; may be zero
⢠See Applications Information section for more details.
Figure 13. Receiver Skew Margin (RSKM) without DESKEW
C â Setup and Hold Time (Internal data sampling window) defined by Rspos (receiver input strobe position) min and
max RSKMD ⥠TPPOSvariance (d) + TJCC (output jitter)(f) + ISI (m)
⢠d = Tppos â Transmitter output pulse position (min and max)
⢠f = TJCC â Cycle-to-cycle LVDS Output jitter (TJCC) is less than 100 ps (worse case estimate).
⢠m = extra margin - assigned to ISI in long cable applications
⢠See Applications Information section for more details.
Figure 14. Receiver Skew Margin (RSKMD) with DESKEW
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