The LM34 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Fahrenheit temperature. The LM34 does not require any external calibration or trimming to provide typical accuracies of ±1⁄2˚F at room temperature and ±11⁄2˚F over a full −50 to +300˚F tempera- ture range.
The LM34 series are precision integrated‑circuit temperature sensors that output a voltage linearly proportional to Fahrenheit temperature. The device is calibrated directly in °F, offers a linear +10.0 mV/°F scale factor, and is available in TO‑46, TO‑92, and SO‑8 packages.
The document provides absolute maximum ratings, DC electrical characteristics, typical performance graphs, and application examples such as two‑wire remote sensors, 4‑20 mA current sources, and voltage‑to‑frequency converters. It also includes mounting guidelines, thermal resistance data, and a life‑support policy disclaimer.
| Scale factor | +10.0 mV/°F |
|---|---|
| Accuracy | 1.0 °F at +77 °F |
| Supply voltage range | 5 V to 30 V |
| Current drain | < 90 µA |
| Self‑heating | < 0.2 °F in still air |
| Operating temperature range | -50 °F to +300 °F |
| Output impedance | 0.40 Ω @ 1 mA load |
The LM34 provides a linear output of +10.0 mV per degree Fahrenheit.
The LM34 can be powered from 5 V up to 30 V.
The device draws less than 90 µA of current.
It guarantees 1.0 °F accuracy at +77 °F.