AMC23C12 datasheet(13/32 Pages) TI

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7.3 Feature Description

7.3.1 Analog Input

The positive comparator trips when the input voltage (VIN) rises above the VIT+ threshold that is defined as the

reference value plus the internal hysteresis voltage. The positive comparator releases when VIN drops below

the VIT– threshold that equals the reference value. The negative comparator trips when VIN drops below its VIT–

threshold that is defined as the negative reference value minus the internal hysteresis voltage. The negative

comparator releases when VIN rises above its VIT+ threshold that equals the negative reference value.

The difference between VIT+ and VIT– is referred to as the comparator hysteresis and is 4 mV for reference

voltages below 450 mV. The integrated hysteresis makes the AMC23C12 less sensitive to input noise and

provides stable operation in noisy environments without having to add external positive feedback to create

hysteresis. The hysteresis of Cmp0 increases to 25 mV for reference values (VREF) greater than 600 mV. See

the Reference Input description for more details.

Figure 7-1 shows a timing diagram of the relationship between hysteresis and switching thresholds.

VIN

OUT

VIT+

VIT– (VREF)

VIT+ (–VREF)

VIT–

VHYS

0 V

LATCH

Figure 7-1. Switching Thresholds and Hysteresis

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AMC23C12

SBASAB2 – FEBRUARY 2022

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