Hello
My design is using an ATL431B in open loop, as voltage comparator, similar to Fig 30 of the datasheet. As noted in both the datasheet and TI application note slva987a, the output voltage has a small deviation from Vsup as Vin approaches the reference voltage (ie. 2.495). This behavior is shown on Figure 2 of the application report, this image:
Later in the application note, pg7, it is stated that 'roll off' of Vka begins as much as 1V below comparator threshold. This is shown in more detail on figure 8 of the application note.
I am seeing this behavior in my circuit, and would like to know more about how to estimate & reduce the magnitude of this effect by adjusting the circuit components if possible. The circuit is using the ATL431B.
Thank you