When to use a series voltage reference over a shunt voltage reference and vice versa?

Here are some rules of thumb while selecting the voltage reference type:

• If you need better than 0.1% initial accuracy and a 25ppm temperature coefficient, you should probably select a series reference.
• If you want the lowest operating current, consider a shunt reference.
• For power-supply voltages higher than 40V, a shunt reference may be your only choice.
• Consider shunt references when building a negative reference, floating reference, clipping circuit, or limiting circuit.