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ISO1212EVM: design requirement

Guruprasad Nanadi
Prodigy 10 points
Part Number: ISO1212EVM

Tool/software:

i want to use this ISO1212DBQ ic for below specification.

Input logic low voltage (VIL) 0 VDC ±4 VDC
Input logic high voltage (VIH) ±11 VDC ±30 VDC

Kindly send me reference design.

  • 0
    TI__Mastermind 29185 points

    Hello Guruprasad, 

    The input threshold voltages can be set to various levels. However, there is a limited range set by the equations in the datasheet. 

    As you can see from captured below when Rthr = 0; VIH and VIL will be at a minimum. VIH = 8.25V, and VIL= 7.1V. There is a threshold resistor calculator available for downlowad at this link http://www.ti.com/lit/zip/SLLC457. 

    Please also see the following datasheet table for the expected values for 0, 1k and 4k-ohm Rthr resistor.

    Best,
    Andrew