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ISO3086: VOD

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 

  • 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

  • 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