• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 21 subscribers
  • Views 607 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

CDCV304 - Can you drive two SN65LVDS1 from one of the output channel ?

Kawai
Guru 19785 points
Other Parts Discussed in Thread: CDCV304, SN65LVDS1

Hi Team,

Our customer is considering to use CDCV304 and SN65LVDS1 as they have these device registered in their company.

[Question]
Can you drive two SN65LVDS1 from one of the CDCV304 output channel ?

CDCV304 output current is about 50mA and SN65LVDS1 input current is 20uA, so it seems it is possible.  What do you think ? Could you please give us your advice ?

Thanks in advance.

Best Regards,

Kawai

  • 0
    Guru 19785 points

    Hello Team,

    Customer uses series 30 Ohm resistor at the output based on the app note SCAA052A.

    So, their considered schematic is,

    CDCV304------33Ohm-----+--------SN65LVDS1
                                              |
                                              +--------SN65LVDS1

    * VCC=3.3V for both devices.

    Could you please advise us if they could use this way or not ?

    Best Regards,
    Kawai

  • 0 in reply to Kawai
    TI__Genius 10320 points

    Hi Kawai-san,


    This configuration looks OK. The series resistor help match the low impedance (~20 ohm) CMOS output to the transmission line in this case. Driving two SN65LVDS1 devices is OK as the input capacitance is low enough (~3 pF) per device. Note that the CDCV304 is specified with 10 pF load, so ensure the transmission line + device input capacitance is in this range to ensure device performance.

    Gabe

  • 0 in reply to Gabe Ayala
    Guru 19785 points
    Hello Gabe-san,

    Thank you very much for your advise. Yes, I will ask customer to double check the load capacitance for the device performance.

    Best Regards,
    Kawai