SNIS189C June 2015  – June 2017 LMT01

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 Electrical Characteristics - TO-92/LPG Pulse Count to Temperature LUT
    7. 6.7 Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUT
    8. 6.8 Switching Characteristics
    9. 6.9 Timing Diagram
    10. 6.10Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1Output Interface
      2. 7.3.2Output Transfer Function
      3. 7.3.3Current Output Conversion to Voltage
    4. 7.4Device Functional Modes
  8. Application and Implementation
    1. 8.1Application Information
      1. 8.1.1Mounting, Temperature Conductivity, and Self-Heating
    2. 8.2Typical Application
      1. 8.2.13.3-V System VDD MSP430 Interface - Using Comparator Input
        1. 8.2.1.1Design Requirements
        2. 8.2.1.2Detailed Design Procedure
          1. 8.2.1.2.1Setting the MSP430 Threshold and Hysteresis
        3. 8.2.1.3Application Curves
    3. 8.3System Examples
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
  11. 11Device and Documentation Support
    1. 11.1Receiving Notification of Documentation Updates
    2. 11.2Community Resources
    3. 11.3Trademarks
    4. 11.4Electrostatic Discharge Caution
    5. 11.5Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Features

  • High Accuracy Over –50°C to 150°C Wide Temperature Range
    • –20°C to 90°C: ±0.5°C (Maximum)
    • 90°C to 150°C: ±0.625°C (Maximum)
    • –50°C to –20°C: ±0.7°C (Maximum)
  • Precision Digital Temperature Measurement Simplified in a 2-Pin Package
  • Pulse Count Current Loop Easily Read by Processor. Number of Output Pulses is Proportional to Temperature With 0.0625°C Resolution
  • Communication Frequency: 88 kHz
  • Conversion Current: 34 µA
  • Continuous Conversion Plus Data-Transmission Period: 100 ms
  • Floating 2-V to 5.5-V (VP–VN) Supply Operation With Integrated EMI Immunity
  • Multiple 2-Pin Package Offerings: TO-92/LPG (3.1 mm × 4 mm × 1.5 mm) – ½ the Size of Traditional TO-92 and WSON With Wettable Flanks

Applications

  • Digital Output Wired Probes
  • White Goods
  • HVAC
  • Power Supplies
  • Industrial Internet of Things (IoT)
  • Battery Management

LMT01 Accuracy

LMT01 C014_3V_SNIS189.png
Typical units plotted in center of curve.

Description

The LMT01 device is a high-accuracy, 2-pin temperature sensor with an easy-to-use pulse count current loop interface, which makes it suitable for onboard and offboard applications in automotive, industrial, and consumer markets. The LMT01 digital pulse count output and high accuracy over a wide temperature range allow pairing with any MCU without concern for integrated ADC quality or availability, while minimizing software overhead. TI’s LMT01 device achieves a maximum ±0.5°C accuracy with very fine resolution (0.0625°C) over a temperature range of –20°C to 90°C without system calibration or hardware and software compensation.

The LMT01’s pulse count interface is designed to directly interface with a GPIO or comparator input, thereby simplifying hardware implementation. Similarly, the LMT01's integrated EMI suppression and simple 2-pin architecture makes it suitable for onboard and offboard temperature sensing in a noisy environment. The LMT01 device can be easily converted into a two-wire temperature probe with a wire length up to two meters. See LMT01-Q1 for the automotive qualified version.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
LMT01LPG TO-92 (2) 4.00 mm × 3.15 mm
LMT01DQXWSON (2)1.70 mm × 2.50 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

2-Pin IC Temperature Sensor

LMT01 Schem_06_SNIS189.gif

Revision History

Changes from B Revision (April 2017) to C Revision

  • Removed Electrical Characteristics: WSON/DQX table; Combined the LPG and DQX Electrical Characteristics tables togetherGo
  • Changed IOL maximum value from: 39 µA to: 40 µAGo
  • Changed leakage value from: 1 µA to 3.5 µAGo
  • Moved the thermal response time parameters to the Electrical Characteristics tableGo
  • Added Missing Cross ReferencesGo

Changes from A Revision (June 2015) to B Revision

  • Added new WSON/DQX package throughout data sheet Go
  • Changed updated package information. Go
  • Added Electrical Characteristics - WSON/DQX Pulse Count to Temperature LUTGo
  • Added -40 for Sample Calculations Table Go
  • Added missing cross reference Go

Changes from * Revision (June 2015) to A Revision

  • Added full datasheet. Go
  • Added clarification note. Go