It is a three-terminal device in a SOT-23-3 package — the same footprint as a small-signal transistor — so it fits into tight analog front-end layouts where a clean reference voltage is needed for an ADC, DAC, or comparator threshold. The ±0.2% initial tolerance means the output sits between 1.2475 V and 1.2525 V at 25 °C without any trim. For a 12-bit ADC with a 1.25 V reference, that tolerance contributes roughly 8 LSB of gain error before the temperature drift is factored in — good enough for most industrial sensing and control loops without a calibration step.
Noise floor and temperature drift — the analog designer's call
Low-frequency noise is specified at 14 µVp-p from 0.1 Hz to 10 Hz, and broadband noise at 42 µVrms from 10 Hz to 10 kHz. That 14 µVp-p figure is the one that matters for a precision weigh scale or a thermocouple front-end — it sets the noise floor below the ADC's least-significant bit at 16-bit resolution with a 1.25 V reference. Temperature coefficient is 75 ppm/°C. For a 0.1% accurate system, that drift eats into the error budget — plan a calibration hold or a tighter-trimmed reference if the ambient swings more than 50°C.
Sourcing and lifecycle — still a current-production part
The SOT-23-3 package is a common, widely stocked footprint.