Dear Team,
Please share me the eye pattern requirement for below ICs.
1)LMH0344SQ/NOPB
2)LMH0302SQE/NOPB
3)LMH0346MH/NOPB
Also share me Ibis AMI model for above parts.also (.ami and .dll files)
Regards,
Prasanna G
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Hi Prasanna,
1. There is no input jitter tolerance requirement for the LMH0302, since it is a cable driver. Input jitter tolerance is a parameter applicable to reclockers, as this parameter determines the maximum amount of input jitter allowed before the reclocker is unable to retain lock. The parameter to pay attention to, instead, is the additive jitter parameter, which pertains to the amount of jitter that is typically added as a result of the signal passing through the cable driver.
2. According to SMPTE Standard RP184-1996, input jitter tolerance is defined as "peak-to-peak amplitude of sinusoidal jitter that, when applied to an equipment input, causes a specified degradation of error performance." Input jitter tolerance must be at least the requirement set by SMPTE standards. I have posted the input jitter tolerance levels for multiple SMPTE data rates for convenience.
The input jitter tolerance for the LMH0346 shows that the LMH0346 exceeds the SMPTE requirements and can therefore achieve and retain lock in the presence of at least the amount of jitter specified in the datasheet.
3. From a SMPTE compatibility standpoint, rise and fall time requirements are only required for cable driver 75-ohm outputs.
Therefore, only the LMH0302 is applicable for meeting a specific rise/fall time requirement defined by SMPTE. You can find the max rise/fall time in Table 6.6:
The LMH0346 specifies both an input rise/fall time maximum in the datasheet, but this is not based on a SMPTE specification. Note that the LMH0344 output rise/fall time meets the LMH0346 input rise/fall time requirements.
Lastly, it is assumed that the LMH0344 input is receiving an input signal from a driver device whose rise/fall times comply with SMPTE rise/fall time requirements.
Thanks,
Michael