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LMH0384: 50Ohm 3G-SDI System Approval

alex r
Prodigy 50 points

Part Number: LMH0384
Other Parts Discussed in Thread: LMH0302, , DS30BA101, DS30EA101

Hallo Ti-Team,

for new product development we would have the following circuit/block diagram:

sdi_circuit.png

Customer would have single-ended 50Ohm 3G-SDI source & differential 100Ohm signal sink. 

For signal integrity improvement we would use Equalizer & Cable Driver IC.

I was wondering if you could approve above circuit & block diagram?

Not sure if DC-coupling is possible between LMH0384 & LMH0302 with 100Ohm Termination.

Also, after checking support forum, solution with DS30EA101 & DS30BA101 may be a better option.

 

I'd be glad to hear your opinion on this.

  • 0
    TI__Mastermind 24431 points

    Hi, 

    I do not believe LMH0302 is the right choice since it outputs signal for 75 ohm single ended. I think DS30BA101 will be a better fit to equalize the signal. What is the planned trace length on the PCB-T line. 

    I am unsure if 50 ohm SDI signal input will work as the device was characterized for 75 ohm SMPTE signal. This is also true for DS30EA101, but DS30EA101 + DS30BA101 solution may be better since this is a generic equalizer. 

    Best,
    J