What the 3V shunt reference buys you in a SOT-23-3
The MAX6009AEUR+T: Output noise is 75µVp-p from 0.1Hz to 10Hz, which keeps the reference clean for a 12-bit ADC or a precision comparator threshold without an external filter cap on the output. It sinks up to 2 mA from the load with a minimum cathode current of just 1 µA, so it works with a low-bias op-amp or a microcontroller ADC reference input without wasting supply headroom.
Active production and compliance status
The industrial temperature grade (-40°C to 85°C) covers most factory-floor, instrumentation, and telecom equipment enclosures without derating.