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ISOM8710: Input hysteresis current

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Prodigy 70 points

Part Number: ISOM8710

Hello

We are considering the use of the ISOM8710.
For our system, the input current of the ISOM8710 is expected to be 2mA (typical value 2.15mA, minimum value 2.01mA).
The datasheet specifies a maximum input threshold current of 2mA and a typical input hysteresis current of 0.26mA.

Regarding the input hysteresis current, as shown in the attached diagram, even if the input current falls below the threshold during the ON state, the hysteresis component does not transition to the OFF state.
Is it correct to understand that the minimum current required for transition to the ON state is a maximum of 2mA, unaffected by hysteresis, and not 2.26mA?

 

Our system is designed with a minimum current value extremely close to 2mA. If mass production proceeds with this design value, what is the likelihood that the ISOM8710 will fail to operate?

We apologise for the inconvenience during your busy schedule, but we would be most grateful for your assistance regarding this matter.

 

  • 0
    TI__Genius 15660 points

    Hi,

    Thanks for reaching out. 

    We have Thanksgiving Holiday in US and will be back in office from 1st December, Monday. 

    Regards
    Varun

  • +1
    Guru 325070 points

    The datasheet does not guarantee any specific amount of hysteresis (the 0.26 mA value is typical).
    The datasheet does guarantee that with an input current of 2 mA, the input has switched on. So whatever the actual hysteresis might be, the off threshold must be by that amount below 2 mA. (If the hysteresis is 0.26 mA, then the input current must fall below 1.74 mA.)

    (As shown in figures 6-1/6-3, the switching typically happens at much lower currents.)

  • 0 in reply to Clemens Ladisch
    Prodigy 70 points

    Thank you!

    I understand that if designed for a maximum current of 2mA, it should be capable of switching on.