SNIS167E March 2013  – October 2017 LMT84

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Device Comparison Tables
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Accuracy Characteristics
    6. 7.6Electrical Characteristics
    7. 7.7Typical Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1LMT84 Transfer Function
    4. 8.4Device Functional Modes
      1. 8.4.1Mounting and Thermal Conductivity
      2. 8.4.2Output Noise Considerations
      3. 8.4.3Capacitive Loads
      4. 8.4.4Output Voltage Shift
  9. Application and Implementation
    1. 9.1Applications Information
    2. 9.2Typical Applications
      1. 9.2.1Connection to an ADC
        1. 9.2.1.1Design Requirements
        2. 9.2.1.2Detailed Design Procedure
        3. 9.2.1.3Application Curve
      2. 9.2.2Conserving Power Dissipation With Shutdown
        1. 9.2.2.1Design Requirements
        2. 9.2.2.2Detailed Design Procedure
        3. 9.2.2.3Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Examples
  12. 12Device and Documentation Support
    1. 12.1Receiving Notification of Documentation Updates
    2. 12.2Community Resources
    3. 12.3Trademarks
    4. 12.4Electrostatic Discharge Caution
    5. 12.5Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Features

  • LMT84LPG (TO-92S package) has a Fast Thermal Time Constant, 10-s Typical (1.2 m/s Airflow)
  • Very Accurate: ±0.4°C Typical
  • Low 1.5-V Operation
  • Average Sensor Gain of -5.5 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

Applications

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

Description

The LMT84 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 1.5-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 LMT84LPG 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 LMT84 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 NUMBERPACKAGEBODY SIZE (NOM)
LMT84SOT (5)2.00 mm x 1.25 mm
TO-92 (3)4.30 mm x 3.50 mm
TO-92S (3)4.00 mm x 3.15 mm
For all available packages, see the orderable addendum addendum at the end of the data sheet.

Thermal Time Constant

LMT84 D003_SNIS167.gif
* Fast thermal response NTC

Output Voltage vs Temperature

LMT84 celsius_temp_NEW_SNIS167.gif