2.5V reference rail — what the ±0.1% and 8 ppm/°C mean on your BOM
The REF5025AID is a 2.5V fixed-output series voltage reference from Texas Instruments' REF50xx family. Its ±0.1% initial tolerance is the spec that sets the ADC or DAC reference accuracy floor — if your 16-bit ADC needs a 2.5V reference to stay within 1 LSB at full scale, this part's 2.5 mV worst-case initial error is well inside the budget.
3 µVp-p noise — the spec that determines your ADC SNR ceiling
The part sinks 1.2 mA supply current and can source or sink up to 10 mA of output current.
Active production — no end-of-life clock ticking
That means Texas Instruments is still manufacturing it — no last-time-buy deadline, no scramble for a pin-compatible substitute. The base product number is REF5025, covering the whole family across different tolerance grades and packages.
It is surface-mount, supplied in Tube. The lead pitch is standard — no exotic footprint, no micro-BGA reflow profile.