LM45 is a precision temperature sensor produced by Texas Instruments. It is suitable for a temperature range of -20℃ to +100℃, with an accuracy of ±3℃. It is packaged in SOT-23
The LM45 series are precision integrated‑circuit temperature sensors with a linear 10 mV/°C output. They operate from a single 4.0 V to 10 V supply, draw only 120 µA, and provide ±2 °C accuracy at 25 °C and ±3 °C over the –20 °C to +100 °C range. The low‑impedance output and wafer‑level trimming make them easy to interface with readout or control circuitry.
Typical applications include battery management, portable medical instruments, power‑supply modules, and automotive electronics. The datasheet includes connection diagrams, recommended mounting methods, performance graphs, and mechanical dimensions for the SOT‑23 package.
| Supply Voltage Range | 4.0 V to 10 V |
|---|---|
| Operating Temperature Range | -20 °C to +100 °C |
| Accuracy over full range | ±3 °C |
| Linearity (Scale Factor) | 10.0 mV/°C |
| Output Impedance | 200 Ω for 1 mA load |
| Self‑heating | <0.2 °C in still air |
The LM45 operates from 4.0 V to 10 V.
It can measure temperatures from –20 °C to +100 °C.