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  • LMT85 1.8-V, SC70/TO-92/TO-92S, Analog Temperature Sensors

    • SNIS168E March   2013  – October 2017 LMT85

      PRODUCTION DATA.  

  • CONTENTS
  • SEARCH
  • LMT85 1.8-V, SC70/TO-92/TO-92S, Analog Temperature Sensors
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Tables
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Accuracy Characteristics
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 LMT85 Transfer Function
    4. 8.4 Device Functional Modes
      1. 8.4.1 Mounting and Thermal Conductivity
      2. 8.4.2 Output and Noise Considerations
      3. 8.4.3 Capacitive Loads
      4. 8.4.4 Output Voltage Shift
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Connection to an ADC
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 Conserving Power Dissipation With Shutdown
        1. 9.2.2.1 Design Requirements
        2. 9.2.2.2 Detailed Design Procedure
        3. 9.2.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE
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DATA SHEET

LMT85 1.8-V, SC70/TO-92/TO-92S, Analog Temperature Sensors

1 Features

  • LMT85LPG (TO-92S package) has a Fast Thermal Time Constant, 10-s Typical (1.2 m/s Airflow)
  • Very Accurate: ±0.4°C Typical
  • Low 1.8-V Operation
  • Average Sensor Gain of -8.2 mV/°C
  • Low 5.4-µA Quiescent Current
  • Wide Temperature Range: –50°C to 150°C
  • Output is Short-Circuit Protected
  • Push-Pull Output With ±50-µA Drive Capability
  • Footprint Compatible With the Industry-Standard LM20/19 and LM35 Temperature Sensors
  • Cost-Effective Alternative to Thermistors

2 Applications

  • Automotive
  • Infotainment and Cluster
  • Powertrain Systems
  • Smoke and Heat Detectors
  • Drones
  • Appliances

3 Description

The LMT85 is a precision CMOS temperature sensor with ±0.4°C typical accuracy (±2.7°C maximum) and a linear analog output voltage that is inversely proportional to temperature. The 1.8-V supply voltage operation, 5.4-μA quiescent current, and 0.7-ms power-on time enable effective power-cycling architectures to minimize power consumption for battery-powered applications such as drones and sensor nodes. The LMT85LPG through-hole TO-92S package fast thermal time constant supports off-board time-temperature sensitive applications such as smoke and heat detectors. The accuracy over the wide operating range and other features make the LMT85 an excellent alternative to thermistors.

For devices with different average sensor gains and comparable accuracy, refer to Comparable Alternative Devices for alternative devices in the LMT8x family.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMT85 SOT (5) 2.00 mm × 1.25 mm
TO-92 (3) 4.30 mm × 3.50 mm
TO-92S (3) 4.00 mm × 3.15 mm
(1) For all available packages, see the orderable addendum addendum at the end of the data sheet.

Thermal Time Constant

LMT85 D003_SNIS167.gif
* Fast thermal response NTC

Output Voltage vs Temperature

LMT85 celsius_temp_NEW_SNIS168.gif

4 Revision History

Changes from D Revision (June 2017) to E Revision

  • Moved the automotive device to a standalone data sheet (SNIS200) Go
  • Changed TO-92 GND pin number from: 1 to: 3 Go
  • Changed TO-92 VDD pin number from: 3 to: 1 Go

Changes from C Revision (October 2015) to D Revision

  • Updated data sheet text to the latest documentation and translations standardsGo
  • Added AEC-Q100 automotive qualification bullets to FeaturesGo
  • Added Time Constant graphGo
  • Removed disk drivers, games, wireless transceivers, and cell phones from ApplicationsGo
  • Added LPG (TO-92S) packageGo
  • Added Figure 10 to Typical CharacteristicsGo

Changes from B Revision (May 2014) to C Revision

  • Deleted all mentions of TO-126 package Go
  • Added TO-92 LPM pin configuration graphicGo
  • Changed Handling Ratings to ESD Ratings and moved Storage Temperature to Absolute Maximum Ratings tableGo
  • Changed KV to V Go
  • Added TO-92 LP and LPM layout recommendationsGo

Changes from A Revision (June 2013) to B Revision

  • Changed data sheet flow and layout to conform with new TI standards. Added the following sections: Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, Mechanical, Packaging, and Orderable Information. Go
  • Added TO-92 and TO-126 package information throughout document.Go
  • Changed from 450°C/W to 275 °C/W. New specification is derived using TI ' s latest methodology. Go
  • Changed Temperature Accuracy Conditions from 70°C to 20°C and VDD from 1.9V to 1.8VGo
  • Deleted Note: The input current is leakage only and is highest at high temperature. It is typically only 0.001 µA. The 1 µA limit is solely based on a testing limitation and does not reflect the actual performance of the part.Go

 
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