This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LMH0344: The eye diagram cannot open wide

Part Number: LMH0344

Dear Experts,

The customer is using LMH0344SQ/NOPB in their camera system. When they connected a 3Gbps camera for signal testing, they found that the eye diagram could not be opened and could not display normally. The schematic diagram is as follows; the customer has tested the line impedance and found no issues; currently, the specific cause of the failure is unclear. I hope you can help analyze it. Thank you

LMH0344.png

 

Picture1.gif

  • Hi Colin, 

    Is the input to the device a differential signal? 
    LMH0344 is a cable equalizer so the customer will have to input 75 ohm single ended signal. That can be the reason why the eye diagram looks like this. 
    Please refer to the typical application below:


    Best,
    J