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TLV3011: Hysteresis example, Figure 2

Steve Widener
Genius 10085 points
Part Number: TLV3011
Other Parts Discussed in Thread: TLV3012

It looks like the hysteresis calculation in Figure 2 / June 2004 datasheet is incorrect - I calculate 0.33 V instead of 0.38V  (assuming a low value pull-up or the TLV3012 push-pull output - please confirm

  • 0
    TI__Prodigy 600 points

    Hi Steve,

    Here are my steps I used:

    1. when the output is high, the VH would be:
    VH = (V+ - Vref) * R1/(R1 + R2) + Vref = (5 - 1.242) * 39/(39+560) + 1.242 = 1.487 (V)

    2. When the output is low, threshold VL = Vref * R2/(R1 + R2) = 1.242 * 560/(39 + 560) = 1.161 (V)

    So the hysterisis= VH - VL = 0.326 or 326 mV

    So my calculation matches yours. The equation in the current data sheet seems to be a bit over-simplified.