I need a cheap, somewhat accurate (~0.5%) voltage reference for some DACs. At first I was going to use a LDO voltage regulator (a TC1223 specifically) for this, it seems to fit the bill looking at the datasheet. Then I saw there is a separate category of ICs called voltage references rather than voltage regulators. But from what I can tell the voltage references with the same initial accuracy as the regulator I mentioned above, costs more, and also requires one or more external resistors (at least the shunt diode reference types).
So I was wondering what the difference between regulators and references are, and whether or not I can make do with a regulator for my needs or if I should get a reference, regardless of the higher price for seemingly similar specs. Thanks.