REF19x series precision micropower low dropout voltage reference
The REF19x Series are precision band‑gap voltage references that combine patented temperature‑drift curvature correction and laser‑trimmed thin‑film resistors. They operate from supplies as low as 100 mV above the output voltage and consume less than 45 µA in normal mode, making them ideal for portable instruments, smart sensors, and solar‑powered applications.
The document lists detailed electrical characteristics for each part number, including initial accuracy, temperature coefficient, dropout voltage, and load regulation. It also covers application notes such as sleep‑mode operation, short‑circuit behavior, and ordering guide information for various package options.
| Initial accuracy | ±2 mV max |
|---|---|
| Temperature coefficient | 5 ppm/°C max |
| Low supply current (normal mode) | 45 µA max |
| Sleep mode supply current | 15 µA max |
| Dropout voltage (3.3 V supply, 10 mA load) | 1.25 V |
The device draws up to 45 µA with no load.
In sleep mode the supply current is reduced to less than 15 µA.
The dropout voltage is 1.25 V under those conditions.
The series is specified from –40 °C to +85 °C, with extended data to +125 °C for some applications.