2.5 V fixed output with ±0.2% initial accuracy
The MAX6037AAUK25: This is a series voltage reference with a fixed 2.5 V output and an initial accuracy of ±0.2%. For a 2.5 V reference, that works out to a maximum initial error of ±5 mV — tight enough to set the full-scale range of a 12-bit ADC without external trimming, as long as the ADC's own reference input error is accounted for. The temperature coefficient is 25 ppm/°C. That matters if your circuit needs to hold accuracy across temperature without a calibration step.
Noise floor and load drive for precision analog
For a 2.5 V reference feeding a 16-bit SAR ADC with a 5 V reference input range, the noise contribution from the reference is about 0.6 LSB at the 10 kHz bandwidth — clean enough for most industrial sensor chains without post-filtering. The device can source or sink up to 5 mA while staying in regulation. That's enough to drive the reference input of one or two ADCs plus a small buffer, but not enough to power an external load — plan on a separate low-noise buffer if the load exceeds a few mA. Supply current is 275 µA typical, which keeps the power budget low in battery-operated designs.
RoHS compliance flag
For builds that require RoHS compliance, verify whether your assembly house can accept non-RoHS parts or if a compliant variant from the same family is needed. The part is in Bulk packaging, so it ships in tubes or trays rather than tape-and-reel.