The REF3030AIDBZT is a Texas Instruments series voltage reference that outputs a fixed 3 V with ±0.2% initial accuracy. Temperature drift is rated at 75 ppm/°C.
Noise floor and output drive — sizing the reference for your load
Low-frequency noise is specified at 33 µVp-p (0.1 Hz to 10 Hz) and 94 µVrms (10 Hz to 10 kHz). For a 3 V full-scale ADC, 33 µVp-p corresponds to roughly 0.001% of full scale — well below the quantization noise of a 12-bit converter (0.024% of FS). The wideband noise matters more if the reference feeds a high-speed pipeline ADC without a post-filter; a 0.1 µF bypass at the output pin knocks down the 10 kHz+ content. Output current is rated at 25 mA. That's enough to drive the reference input of several ADCs or a small resistive divider network without an external buffer. The 50 µA quiescent supply current keeps the part viable for battery-powered instruments — the REF3030 draws less than 0.2% of its output capability as overhead.
Package and temperature grade — board-fit and environment
The REF3030AIDBZT comes in a SOT-23-3 package (also listed as TO-236-3 / SC-59). Three pins — input, output, ground. Input voltage range is 3.05 V to 5.5 V, so the reference needs at least 50 mV of headroom above the 3 V output.
No official second-source cross-reference is listed, but the base product number REF3030 shares the same die across multiple package and grade variants (AIDBZT is the SOT-23-3 tape-and-reel option).