LM35
Public Made by Adomby adom
TI precision analog temperature sensor, TO-92. Linear 10 mV/C, -55 to +150 C, no calibration. Datasheet-verified.
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markdownLM35
Texas Instruments · Analog temperature sensor · TO-92
A precision analog temperature sensor in a TO-92 that outputs a voltage directly proportional to Celsius temperature: 10 mV per degree C, so 250 mV means 25 C. Unlike a thermistor it is linear and needs no calibration or linearization, and unlike the digital DS18B20 it feeds an ADC directly with three pins (+VS, VOUT, GND). It reads -55 to +150 C (the full range needs a small negative-bias resistor) with about plus/minus 0.5 C accuracy, drawing only 60 uA so self-heating is negligible. Runs from 4 to 30 V.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | +VS | power_in | Positive supply pin. Recommended operating range 4 V to 30 V; absolute max 35 V. Quiescent current is typ. 60 µA (LM35A at 5 V, 25°C). |
| 2 | VOUT | output | Analog temperature output. Linear scale factor +10 mV/°C referenced to GND (0 V at 0°C). Low-impedance output (~0.1 Ω at 1 mA load); rated output current 10 mA; output voltage range −1 V to +6 V (absolute max). |
| 3 | GND | power_in | Device ground pin; connect to power-supply negative terminal (or to the −VS rail in a full-range dual-supply configuration). |
Key specifications
| Parameter | Value |
|---|---|
| Type | Analog temperature sensor |
| Output | 10 mV/°C (linear, direct Celsius) |
| Range | -55 to +150 °C |
| Accuracy | ±0.5 °C (typical) |
| Calibration | none required |
| Supply current | ~60 µA |
| Supply voltage | 4-30 V |
| Package | TO-92 (3-lead) |
Ordering variants
Same part, different packaging or reel option.
LM35DZ (TO-92, 0 to 100 °C)LM35CZ (TO-92, -40 to 110 °C)
CAD (KiCad official)
- Symbol:
Sensor_Temperature:LM35-LP - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D)
- 3D model files:
lm35-etched.step/lm35-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm35.step/lm35.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (38 pp, sha256
1884601dffcbe160, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).