Fixed 3V rail for precision bias
The REF5030AID is a series voltage reference from Texas Instruments that outputs a fixed 3V with ±0.1% initial accuracy. It operates from a 3.2V to 18V input rail and delivers up to 10 mA to the load, making it a direct bias source for precision ADCs, DACs, or sensor excitation circuits that need a stable 3V reference without an external divider.
Noise floor and supply current
The reference itself draws 1.2 mA quiescent current, so the 10 mA output budget is almost entirely available for the load — a 10 mA load leaves about 8.8 mA of headroom after the internal bias.