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DS90LT012AQ-Q1: Driving 50ohm transmission line

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Replies: 1

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Part Number: DS90LT012AQ-Q1

Hi Team,

My customer is considering the DS90LT012AQ LVDS receiver. From the electrical specs it’s not obvious how this part can drive a 50ohm line with 350ps rising / 175ps falling edges if it can only source/sink +0.4mA/-2mA. That works out to roughly 500ohm/175ohm output impedance at dc. 

 Can this part drive a 50ohm transmission line or is it intended to only be located at the terminus?  Does the part have a higher dynamic current drive for driving a TTL signal into a 50ohm transmission line, or would we need to buffer the output?

Thanks,
Mitchell

 

  • Hi Mitchell,

    The output is not really meant to drive long transmission lines (that is what the LVDS input is for) so the device should be placed near the signal destination.

    Regards,

    I.K.

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