• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 14 subscribers
  • Views 641 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

ISO3086: VOD

Kai Hsiao
Guru 12675 points
Part Number: ISO3086

Hi Sir 

May I know how to increase VOD magnitude when RL= 60ohm 

I saw ADI solution can be reach to VOD maximum value,but TI doesn't have maximum value 

  • 0
    TI__Intellectual 2325 points

    Hi Kai,

    Thank you for using our E2E forums!

    For a given part, there are a few ways to increase Vod:

    • Increase the supply (Vcc2) value [within the operating conditions allowed]
    • Decrease the load current by increasing the load resistor . by decreasing the current, the drops across internal switches will be reduced, thereby allowing more swing on the bus pins i.e., higher vod.
    • Reducing external bus load : reducing cable length, reducing number of nodes etc. 

    However in this case, the resistor is fixed at 60 ohms, so the easiest way in this case is the first option. The allowed range for Vcc2 is 4.5 to 5.5V. So the customer can use the higher end of Vcc2 to improve this.  Is there a target value needed? The 3086 easily provides the 1.5V minimum required for bus communications.

    The maximum value is limited internally to the value of Vcc2 rail. [best case]. Please see screenshot below from the datasheet:

    Hope this helps.

    Regards,

    abhi

  • 0 in reply to Abhi Aarey
    TI__Intellectual 2325 points
    Hi Kai,

    Hope you got the clarification you needed from the post above.
    It's been a few weeks since we heard from you, so I'd like to retire this thread and mark my previous reply as "TI thinks resolved "for completeness.

    Of course we will still be here if you need further questions for follow-up! you can do so by clicking the "ask a related question" button or "ask a new question" button.

    Best regards,
    Abhi