The ±1% initial tolerance sets the absolute accuracy floor — a 3V reference with 1% tolerance delivers between 2.97V and 3.03V before any temperature or load effects are added. That budget matters when the reference feeds a 12-bit ADC where 1 LSB at 3V is roughly 732 µV; the reference error alone consumes several LSBs of the input range.
Temperature drift — 150 ppm/°C across the industrial band
The temperature coefficient is 150 ppm/°C, which means the output voltage shifts by 450 µV per degree. For a design that holds a 12-bit ADC reference input, that drift is the dominant error term — larger than the initial tolerance after a 20°C temperature change. The shunt architecture draws only 82 µA cathode current, which keeps self-heating low and the drift contribution from the device itself minimal.
35 µVrms noise — bench-level quiet for the reference node
That is low enough that the reference noise does not limit a 12-bit system at 3V full-scale — the quantization noise floor sits around 732 µV, so the reference adds roughly 5% of that. The 15 mA output current capability is sized to drive multiple loads: a reference buffer, several comparator inputs, and the ADC reference input simultaneously, as long as the total current drawn by the load plus the bias resistor stays under that ceiling.
The device comes in a SOT-23-3 package, which is a three-pin surface-mount package with a 0.95 mm pitch. The anode pin connects to ground, the cathode pin connects to the bias resistor and the load, and the third pin is the reference output. The small footprint suits space-constrained designs on 2-layer boards where a larger SOIC-8 reference would not fit.
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