2.5 V series reference in an 8-SOIC — the precision anchor for an ADC or DAC supply
The MAX873BESA+ is a precision series voltage reference from Analog Devices, delivering a fixed 2.5 V output with ±0.1% initial accuracy and a 20 ppm/°C temperature coefficient.
Noise floor that doesn't mask the ADC's LSBs
The series topology means the reference sources current to the load, so the output stays within regulation as long as the input rail stays above the dropout — no external resistor needed, unlike a shunt reference.