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LTC2859 Ro Logic

Yuya
on Oct 23, 2018

Hi,

My customers are considering using LTC 2859.

So I got a question.

If A - B of LTC 2859 is 200 mV or more (225 mV or more with hysteresis added), Ro = H.
When A - B is -200 mV or less (-225 mV or less with hysteresis added) Ro = L.

Although I recognize it, What is Ro in the range of -175 mV to 175 mV (considering hysteresis 25 mV)?

Best regards,

Yuya

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    •  Analog Employees 
    on Oct 23, 2018 9:41 AM

    Hi Yuya,

    The receiver input hysteresis band could vary between different units and over temperature within the -200mV to 200mV range. I think you are asking about the fail-safe feature of the product, the LTC2859 has a fail-safe that guarantees the receiver output to be in a logic HIGH state when the inputs are either shorted, left open, or terminated(externally or internally), but not driven for more than about 3us. You could refer to the Receiver and Failsafe section in the datasheet.

    Regards,

    Neil

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    •  Analog Employees 
    on Oct 23, 2018 9:41 AM

    Hi Yuya,

    The receiver input hysteresis band could vary between different units and over temperature within the -200mV to 200mV range. I think you are asking about the fail-safe feature of the product, the LTC2859 has a fail-safe that guarantees the receiver output to be in a logic HIGH state when the inputs are either shorted, left open, or terminated(externally or internally), but not driven for more than about 3us. You could refer to the Receiver and Failsafe section in the datasheet.

    Regards,

    Neil

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