JAJSLB5C December 2021 – December 2023 TLV3801 , TLV3802 , TLV3811
PRODUCTION DATA
A comparator's high, open-loop gain creates a small band of input differential voltage where the comparator may produce "chatter" which causes the output to toggle back and forth between a “logic high” and a “logic low”. This can cause design challenges for inputs with slow rise and fall times or systems with excessive noise. These challenges can be prevented by adding hysteresis to the comparator. However, hysteresis must be added strategically when input signals are small since it can cuase signals to go undetected. As a result, TLV3811C is optimized for detecting small, fast-switching inputs and has 0 mV of internal hysteresis. On the other hand, for detecting larger input signals in the presense of noise, the TLV3811 has 1.1 mV of internal hysteresis and TLV3801 and TLV3802 have 2 mV.
Since the TLV380x/TLV3811(C) only have a minimal amount of internal hysteresis, external hysteresis can be applied in the form of a positive feedback loop that adjusts the trip point of the comparator depending on its current output state. See the Non-Inverting Comparator With Hysteresis section for more details.