REF4132B25DBVRQ1

REF4132B25DBVRQ1 is a 2.5-V automotive series voltage reference from Texas Instruments in a 5-pin SOT-23 package, with ±0.05% maximum initial accuracy and a B-grade temperature coefficient of 30 ppm/°C maximum over -40 °C to +125 °C. Its advantage is a quiet, low-power reference for precision conversion: ±10 mA output current, 100 µA maximum quiescent current, 15 µVpp/V (normalized, typical) output noise from 0.1 Hz to 10 Hz, an enable pin, and AEC-Q100 qualification. The benefit is a stable ADC/DAC reference rail that holds accuracy across the automotive temperature range without a larger or hungrier reference. Evidence: TI lists the 2.5-V option, ±0.05% accuracy, B-grade 30 ppm/°C drift, AEC-Q100 Grade 1 results, and 30 ppm per 1000 hrs long-term stability (0–1000 h at 35 °C) on the official REF4132-Q1 product page and datasheet. Selection advice: the B in B25 denotes the 30 ppm/°C grade, not the tighter 12 ppm/°C A grade; if your error budget needs the lower drift, order REF4132A25DBVRQ1 instead, and do not substitute a 3.0-V or 3.3-V REF4132 variant for a 2.5-V rail. Parameters verified against Texas Instruments documentation (REF4132-Q1 datasheet Rev. A, SNAS795A).