The LM4040 is a precision two-terminal shunt mode, bandgap voltage reference available in fixed reverse breakdown voltages of 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V.
The LM4040 is a two‑terminal shunt‑mode bandgap voltage reference designed for space‑critical applications. It is offered in ultra‑small 3‑pin SC70 (1.8 mm × 1.8 mm) and SOT‑23 packages and provides fixed reverse‑breakdown voltages of 2.048 V, 2.500 V, 3.000 V, 3.3 V, 4.096 V and 5.000 V. Laser‑trimmed resistors give initial accuracy grades from 0.1 % to 1 % with a temperature coefficient of 100 ppm/°C.
Key specifications include a shunt current range of 60 µA to 15 mA, low output noise (28 µV RMS from 10 Hz to 10 kHz), and no need for an external stabilizing capacitor. The device operates from –40 °C to +125 °C and tolerates capacitive loads, making it suitable for portable, battery‑powered equipment, notebook computers, cell phones, and industrial process controls. This manual is written in Chinese.
| Fixed reverse‑breakdown voltages | 2.048 V, 2.500 V, 3.000 V, 3.3 V, 4.096 V, 5.000 V |
|---|---|
| Operating temperature range | –40 °C to +125 °C |
| Shunt current capability | 60 µA to 15 mA |
| Initial accuracy grades | 0.1 % to 1 % |
| Package size (SC70) | 1.8 mm × 1.8 mm |
| Temperature coefficient | 100 ppm/°C |
| Output noise | 28 µV RMS (10 Hz to 10 kHz) |
| External capacitor requirement | Not required |
The LM4040 provides fixed reverse‑breakdown voltages of 2.048 V, 2.500 V, 3.000 V, 3.3 V, 4.096 V and 5.000 V.
It is guaranteed to operate from –40 °C up to +125 °C.
The device can handle a shunt current from 60 µA up to 15 mA.
No, the LM4040 does not require an external stabilizing capacitor.