Precision 5V rail for the analog front-end
The MAX6133A50 is a 5V fixed-output series voltage reference from Analog Devices, built for applications that need a stable, low-noise rail for ADCs, DACs, or sensor excitation.
What the noise and drift specs mean on the bench
For a 5V reference feeding a 16-bit ADC with a 5V span, 26µVrms corresponds to roughly 0.17 LSB of noise — low enough that the converter's own noise floor dominates. Input voltage range is 5.2V to 12.6V, giving 200 mV of headroom at the low end. That narrow dropout means the reference can run from a 5.2V rail without a separate pre-regulator, but the input must stay clean — ripple on the supply shows up at the output attenuated by the reference's line regulation, not eliminated.
Package and board-fit for the rework bench
The MAX6133A50 comes in an 8-MSOP (also called 8-uMAX/uSOP) package, 3.00 mm wide, with a 0.65 mm pin pitch. That's a common footprint shared with many other 8-pin MSOP references and op-amps, so the board layout is straightforward. The bulk packaging means parts arrive in tubes or trays — no reel, so hand-assembly or small-batch rework is the norm.