Hi expert,
please see below diagram in datasheet:
It is very clear:
"tconv" means period of sampling, sample-hold capacitor charging and data converting.
"tACQ" means period of communication of digital code by series interface.
However please check document SBOA443:
It seems to me that "Vconv" is an edge-signal to trigger sample-hold and converting circuit to start, and "Vacq" high→low means converting is done.
That indicates:
When "Vacq"=1, it represents period "tconv" of sampling and converting.
When "Vacq"=0, it represents period "tACQ" of communication of digital code.
Why do we make those names so confusing to understand?