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 TO-92 packages.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LM135 | TO-46 (3) | 4.699 mm × 4.699 mm |
LM135A | ||
LM235 | TO-92 (3) | 4.30 mm × 4.30 mm |
LM235A | ||
LM335 | SOIC (8) | 4.90 mm × 3.91 mm |
LM335A |
Changes from D Revision (March 2013) to E Revision
Changes from C Revision (November 2012) to D Revision
PIN | I/O | DESCRIPTION | |||
---|---|---|---|---|---|
NAME | TO-46 | TO-92 | SO8 | ||
N.C. | — | — | 1 | — | No Connection |
— | — | 2 | |||
— | — | 3 | |||
– | — | — | 4 | O | Negative output |
ADJ | — | — | 5 | I | Calibration adjust pin |
N.C. | — | — | 6 | — | No Connection |
— | — | 7 | |||
+ | — | — | 8 | I | Positive input |