What this reference does on your rail
The MAX6001EUR+T is a series voltage reference from Analog Devices that delivers a fixed 1.25 V output with ±1% initial tolerance. It operates from an input range of 2.5 V to 12.6 V and draws only 45 µA of supply current, making it a fit for battery-powered instrumentation, portable meters, and low-power ADC/DAC bias circuits where every microamp counts. The SOT-23-3 package keeps the footprint small, but the 400 µA output current limit means it drives a reference input, not a power rail.