LM135, LM135A, LM235, LM235A, LM335, LM335A

www.ti.com

SNIS160D – MAY 1999 – REVISED MARCH 2013

LM135/LM235/LM335, LM135A/LM235A/LM335A Precision Temperature Sensors

Check for Samples: LM135, LM135A, LM235, LM235A, LM335, LM335A

1

FEATURES

•

Easily Calibrated

•

Wide Operating Temperature Range

2

•

Directly Calibrated in °Kelvin

•

200°C Overrange

•

1°C Initial Accuracy Available

•

Low Cost

•

Operates from 400

μA to 5 mA

•

Less than 1

Ω Dynamic Impedance

DESCRIPTION

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 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 LM135/LM235/LM335 are available

packaged in hermetic TO transistor packages while the LM335 is also available in plastic TO-92 packages.

Schematic Diagram

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 1999–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.