3V fixed shunt reference in a SOT-23-3 footprint
It uses a shunt (two-terminal) topology, meaning it behaves like a Zener diode and requires an external series resistor to set the bias current. The reference is trimmed to ±0.2% initial tolerance, which is tight enough for 12-bit ADC references and sensor excitation in industrial control loops.
Noise and drift — the bench-level specs
Wideband noise is specified at 35µVrms over the 10Hz to 10kHz band, which keeps the reference clean for precision analog front-ends without additional filtering. The temperature coefficient is 100ppm/°C, so the output shifts about 0.3mV over a 10°C delta — fine for most industrial-grade designs but worth derating if the board sits near a hot MOSFET or regulator. Minimum cathode current is 67µA, and the shunt can sink up to 15mA continuous.
It is not specified for automotive under-hood or extended industrial beyond 85°C.
Housed in a SOT-23-3 (TO-236-3, SC-59 compatible) surface-mount package.