The LM135 series are precision, easily-calibrated, integrated circuit temperature sensors. Operating as a 2-terminal zener, the LM135 has a breakdown voltage directly proportional to absolute temperature at 10 mV/°K. With less than 1-Ω dynamic impedance, the device operates over a current range of 400 µA to 5 mA with virtually no change in performance. When calibrated at 25°C, the LM135 has typically less than 1°C error over a 100°C temperature range. Unlike other sensors, the LM135 has a linear output.
Applications for the LM135 include almost any type of temperature sensing over a –55°C to 150°C temperature range. The low impedance and linear output make interfacing to readout or control circuitry are especially easy.
The LM135 operates over a –55°C to 150°C temperature range while the LM235 operates over a –40°C to 125°C temperature range. The LM335 operates from –40°C to 100°C. The LMx35 devices are available packaged in hermetic TO transistor packages while the LM335 is also available in plastic
| Part number | Order | Local sensor accuracy (Max) (+/- C) | Operating temperature range (C) | Supply voltage (Min) (V) | Supply voltage (Max) (V) | Supply current (Max) (uA) | Sensor gain (mV/Deg C) | Rating | Features | Output impedance (ohms) | Interface |
|---|---|---|---|---|---|---|---|---|---|---|---|
| LM335 |
|
6 | -40 to 100 | 5 | 3.04 | 400 | 10 | Catalog | 0.6 | Analog Output | |
| LM135 |
|
3 | -55 to 150 | 5 | 3.01 | 400 | 10 | Catalog | 0.5 | Analog Output | |
| LM135A |
|
1 | -55 to 150 | 5 | 2.99 | 400 | 10 | Catalog | 0.5 | Analog Output | |
| LM235 |
|
3 | -40 to 125 | 5 | 3.01 | 400 | 10 | Catalog | 0.5 | Analog Output | |
| LM35 |
|
0.5 |
-40 to 110
-55 to 150 0 to 100 0 to 70 |
4 | 30 | 114 | 10 | Catalog | UL Recognized | 0.4 | Analog Output |
| TMP235 |
|
1 | -40 to 150 | 2.3 | 5.5 | 12 | 10 | Catalog | Industry standard pinout | 20 | Analog Output |
