The LM4128 precision voltage reference is a surface-mount package ideal for space critical applications. It eliminates the need for an external stabilizing capacitor and ensures stability with capacitive loads up to 10 µF, making it easy to use. Compared to shunt references, series references consume lower power since they don't have to idle the maximum possible load current under no load conditions. The LM4128 has a low quiescent current of 60 µA and a low dropout voltage of 400 mV, making it suitable for battery-powered solutions. It is available in four grades (A, B, C, and D) with varying initial accuracy and temperature coefficients.
The LM4128/LM4128Q series provides precision micropower voltage references in a compact SOT‑23‑5 package. Variants cover reference outputs of 1.8 V, 2.048 V, 2.5 V, 3.0 V and 3.3 V, each with defined accuracy and temperature coefficient.
The document includes a general description, features, typical application circuits, pin descriptions, absolute maximum ratings, detailed electrical characteristics for each voltage option, ordering information, and packaging details. It also notes supply formats (tape‑and‑reel) and a life‑support usage disclaimer.
| Reference Voltage | 1.8 V |
|---|---|
| Reference Voltage | 2.048 V |
| Reference Voltage | 2.5 V |
| Reference Voltage | 3.0 V |
| Reference Voltage | 3.3 V |
| Package Type | SOT‑23‑5 |
| Supply Format | 1000 units, Tape and Reel |
| Supply Format | 3000 units, Tape and Reel |
The LM4128 series offers reference outputs of 1.8 V, 2.048 V, 2.5 V, 3.0 V and 3.3 V.
It is supplied in a SOT‑23‑5 surface‑mount package.
They are available in tape‑and‑reel formats of 1000‑unit or 3000‑unit reels.
Ordering information and part markings are provided in the datasheet under the "Ordering Information" section.