2.5V fixed reference with 3 µVp-p noise — the ADC/DAC anchor
The REF5025AIDGKT from Texas Instruments is a precision series voltage reference that delivers a fixed 2.5 V output with ±0.1 % initial accuracy. Its low noise floor — 3 µVp-p over 0.1 Hz to 10 Hz — and 8 ppm/°C temperature coefficient make it a natural fit for high-resolution data converters, precision instrumentation, and industrial sensor interfaces where the reference voltage directly sets the conversion error budget.
10 mA output — enough for a converter bank
The part sources up to 10 mA of output current while drawing only 1.2 mA from the supply rail. That output capacity can bias the reference inputs of multiple ADCs or DACs on the same board without an external buffer, simplifying the BOM and keeping the noise contribution contained.
The 8 ppm/°C drift specification holds across that span, so the reference voltage stays within a few millivolts of 2.5 V even when the enclosure temperature swings with the motor load or the engine bay heat soak.
8-VSSOP package — small footprint, standard pitch
Housed in an 8-VSSOP (also listed as 8-TSSOP/MSOP, 3.00 mm width), the part occupies minimal board area. The 0.65 mm lead pitch is straightforward for hand assembly or rework, and the surface-mount package reflows on a standard profile without special handling.
The base product number REF5025 covers a family of voltage options (2.048 V, 2.5 V, 3.3 V, 4.096 V, 5 V) in the same package and pinout, so a board designed for the 2.5 V variant can spin a different output voltage by swapping the suffix without a layout change.