SNIS160E May 1999  – February 2015 LM135 , LM135A , LM235 , LM235A , LM335 , LM335A


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2Recommended Operating Conditions
    3. 6.3Thermal Information
    4. 6.4Temperature Accuracy: LM135/LM235, LM135A/LM235A
    5. 6.5Temperature Accuracy: LM335, LM335A
    6. 6.6Electrical Characteristics
    7. 6.7Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1Temperature Calibration Using ADJ Pin
    4. 7.4Device Functional Modes
  8. Application and Implementation
    1. 8.1Application Information
    2. 8.2Typical Application
      1. 8.2.1Design Requirements
      2. 8.2.2Detailed Design Procedure
      3. 8.2.3Application Curve
    3. 8.3System Examples
      1. 8.3.1Thermocouple Cold Junction Compensation
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
    3. 10.3Waterproofing Sensors
    4. 10.4Mounting the Sensor at the End of a Cable
  11. 11Device and Documentation Support
    1. 11.1Device Support
      1. 11.1.1Device Nomenclature
    2. 11.2Related Links
    3. 11.3Trademarks
    4. 11.4Electrostatic Discharge Caution
    5. 11.5Glossary
  12. 12Mechanical, Packaging, and Orderable Information


机械数据 (封装 | 引脚)

1 Features

  • Directly Calibrated to the Kelvin Temperature Scale
  • 1°C Initial Accuracy Available
  • Operates from 400 μA to 5 mA
  • Less than 1-Ω Dynamic Impedance
  • Easily Calibrated
  • Wide Operating Temperature Range
  • 200°C Overrange
  • Low Cost

2 Applications

  • Power Supplies
  • Battery Management
  • HVAC
  • Appliances

3 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 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.

Device Information(1)

LM135TO-46 (3)4.699 mm × 4.699 mm
LM235TO-92 (3)4.30 mm × 4.30 mm
LM335SOIC (8)4.90 mm × 3.91 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Basic Temperature Sensor Simplified Schematic


Calibrated Sensor