• Menu
  • Product
  • Email
  • PDF
  • Order now

  • LMT89 2.4-V, 10-µA, SC70 Temperature Sensor

    • SNIS176A March   2013  – January 2015 LMT89

      PRODUCTION DATA.  

  • CONTENTS
  • SEARCH
  • LMT89 2.4-V, 10-µA, SC70 Temperature Sensor
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 LMT89 Transfer Function
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Capacitive Loads
    2. 8.2 Typical Applications
      1. 8.2.1 Full-Range Centigrade Temperature Sensor
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Centigrade Thermostat
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
    3. 8.3 System Examples
      1. 8.3.1 Conserving Power Dissipation With Shutdown
      2. 8.3.2 Analog-to-Digital Converter Input Stage
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DCK|5
    • MPDS025K
Thermal pad, mechanical data (Package|Pins)
Orderable Information
  • snis176a_oa
  • snis176a_pm
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

LMT89 2.4-V, 10-µA, SC70 Temperature Sensor

1 Features

  • Cost-Effective Alternative to Thermistors
  • Rated for full −55°C to 130°C Range
  • Available in an SC70 Package
  • Predictable Curvature Error
  • Suitable for Remote Applications

2 Applications

  • Industrial
  • HVAC
  • Automotive
  • Disk Drives
  • Portable Medical Instruments
  • Computers
  • Battery Management
  • Printers
  • Power Supply Modules
  • FAX Machines
  • Mobile Phones
  • Automotive

3 Description

The LMT89 device is a precision analog output CMOS integrated-circuit temperature sensor that operates over a −55°C to 130°C temperature range. The power supply operating range is 2.4 V to 5.5 V. The transfer function of LMT89 device is predominately linear, yet has a slight predictable parabolic curvature. The accuracy of the LMT89 device, when specified to a parabolic transfer function, is typically ±1.5°C at an ambient temperature of 30°C. The temperature error increases linearly and reaches a maximum of ±2.5°C at the temperature range extremes. The temperature range is affected by the power supply voltage. At a power supply voltage of 2.7 V to 5.5 V, the temperature range extremes are 130°C and −55°C. Decreasing the power supply voltage to 2.4 V changes the negative extreme to −30°C, while the positive remains at 130°C.

The quiescent current of the LMT89 device is less than 10 μA. Therefore, self-heating is less than 0.02°C in still air. Shutdown capability for the LMT89 device is intrinsic because its inherent low power consumption allows it to be powered directly from the output of many logic gates or does not necessitate shutdown at all.

The LMT89 device is a cost-competitive alternative to thermistors.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMT89 SOT (5) 2.00 mm × 1.25 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

typ_app_nis176.gif

Output Voltage vs Temperature

output_voltage_vs_temperature_nis176.gif

4 Revision History

Changes from * Revision (March 2013) to A Revision

  • Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information sectionGo

5 Pin Configuration and Functions

SC70-5 Top View
top_view_pack_number_nis176.gif

Pin Functions

PIN I/O DESCRIPTION
NO. NAME
1 NC — NC (pin 1) must be left floating or grounded. Other signal traces must not be connected to this pin.
2 GND GND Device substrate and die attach paddle, connect to power supply negative terminal. For optimum thermal conductivity to the PC board ground plane, pin 2 must be grounded. This pin may also be left floating.
3 VO Analog Output Temperature sensor analog output
4 V+ Power Positive power supply pin
5 GND GND Device ground pin, connect to power supply negative terminal.

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale