Hello; I have searched for a thread for this unsuccessfully but not found, but it should be there somewhere I guess.
Here is the issue;
What I want to do is measure a K-thermocouple, and sample for table lookup for temperature; the rang is 0-40mV somewhat (reaching owentemp of approx 1000C)
First thought was; well should probably use an op-amp; but then I realize that the op-amp wants +Vcc and -Vcc; and I want to work with single rail.
(Then I thought I could get away with a "rail-splitter" (got one Ti 2426) but new think Im no better of, since the ground will be difficult to handle, since "psedogroud" cannot
be connected to AD, since ADground is same (connected internal) as MCUs).
So thankful if you have a thinking or reference to how this should (is usually) be done.