I want to be able to compare two voltage down to the microvolt level say for example 1.000,010 and 1.000,000
When I tried to do this, it doesn't work and it take the comparator a certain amount of lower and upper range to be able to flip its output
Like for example, if the ref is 1.000,000 I am expecting it to flip the output when it is greater than the ref like 1.000,001, but that doesn't happen it will flip after maybe 1.001,000 or so (don't remember the exact figure)
I have done that a while ago and got those results and I want to buy some comparator for an upcoming project that I will require this level of comparison.
What is the thing that I am missing?