Hello E2E,
Im seeing a bit of strange behavior in one of TI's comparators and was wondering if you might be able to help me to get to the bottom of why its happening.
So Im using the TLV3011 as a battery monitoring comparator for high and low voltage and its hooked up as shown in the attached folder.TLV3011.zip
(The reason the feedback resistors arent there is because they were creating a voltage divider and not allowing the output to get to its pulled up voltage)
So the NV voltage is powered either off of the 3.6 batter voltage wich can be up to 3.85V or the 3.3 housekeeping when prime power is applier to the card. The strange behavior that im seeing is that when going from primepower off to prime power on the REF voltage (1.242V) generated by the part itself is dipping significantly, I also see strange behavior when going from prime power on to off but its not as significant.
The data sheet calls out a spec of line regulation of up to 100 uV/V which in our case with a max VDD delta of .5V would show only 50 uV which I am cetrainly not seeing, its almost a 1 to 2 ratio dip.
See attached for batt to prime power transitions
This behavior is causing us some issues in a top level so any immediate help would be awesome.
Thanks!
Russell