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  • TMP126 Low-Power, 0.25°C SPI Temperature Sensor With 175°C Operation, CRC and Slew Rate Alert

    • SNIS209C July   2021  – June 2022 TMP126

      PRODUCTION DATA  

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  • TMP126 Low-Power, 0.25°C SPI Temperature Sensor With 175°C Operation, CRC and Slew Rate Alert
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  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 Electrical Characteristics
    6. 7.6 SPI Interface Timing
    7. 7.7 Timing Diagram
    8. 7.8 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Descriptions
      1. 8.3.1 Temperature Limits
      2. 8.3.2 Slew Rate Warning
      3. 8.3.3 Cyclic Redundancy Check (CRC)
      4. 8.3.4 NIST Traceability
      5. 8.3.5 Fast Measurement Intervals With No Self-Heating Concerns
    4. 8.4 Device Functional Modes
      1. 8.4.1 Continuous Conversion Mode
      2. 8.4.2 Shutdown Mode
      3. 8.4.3 One-Shot Mode
      4. 8.4.4 Interrupt and Comparator Mode
        1. 8.4.4.1 Interrupt Mode
        2. 8.4.4.2 Comparator Mode
    5. 8.5 Programming
      1. 8.5.1 Temperature Data Format
      2. 8.5.2 Serial Bus Interface
        1. 8.5.2.1 Command Word Structure
          1. 8.5.2.1.1 Don't Care
          2. 8.5.2.1.2 CRC Enable
          3. 8.5.2.1.3 CRC Data Block Length
          4. 8.5.2.1.4 Auto Increment
          5. 8.5.2.1.5 Read/Write
          6. 8.5.2.1.6 Sub-Address
        2. 8.5.2.2 Communication
        3. 8.5.2.3 Write Operations
        4. 8.5.2.4 Read Operations
        5. 8.5.2.5 Cyclic Redundancy Check (CRC)
          1. 8.5.2.5.1 Cyclic Redundancy Check Implementation
    6. 8.6 Register Map
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information
  14. IMPORTANT NOTICE

Package Options

Mechanical Data (Package|Pins)
  • DCK|6
    • MPDS114F
Thermal pad, mechanical data (Package|Pins)
Orderable Information
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  • snis209c_pm
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DATA SHEET

TMP126 Low-Power, 0.25°C SPI Temperature Sensor With 175°C Operation, CRC and Slew Rate Alert

1 Features

  • High accuracy
    • TMP126:
      • ±0.25°C (maximum) from 20°C to 30°C
      • ±0.3°C (maximum) from –20°C to 85°C
      • ±0.4°C (maximum) from –40°C to 125°C
      • ±0.5°C (maximum) from –55°C to 150°C
      • ±0.75°C (maximum) from 150°C to 175°C
    • TMP126N:
      • ±0.8°C (maximum) from –40°C to 150°C
  • Fast measurement intervals with no self-heating concerns
  • Operating temperature range:
    • TMP126: –55°C to 175°C

    • TMP126N: –40°C to 150°C

  • Supply range: 1.62 V to 5.5 V
  • Factory-calibrated
    • NIST traceability
  • Low power consumption
  • Programmable temperature alert limits
  • Temperature slew rate warning
  • Optional Cyclic Redundancy Check (CRC)
  • 3-wire SPI interface

2 Applications

  • Wireless communication equipment
  • Field transmitters
  • Medical equipment
  • Grid infrastructure
  • Building and factory automation
  • Servo drives
  • Avionics
  • Lasers

3 Description

The TMP126 is a 0.25°C accuracy digital temperature that supports an ambient temperature range of –55°C to 175°C. The TMP126 features a 14-bit signed temperature resolution (0.03125°C per LSB) while operating over a supply range of 1.62 V to 5.5 V. With a fast conversion rate, low supply current, and a simple 3-wire SPI compatible interface, the TMP126 is designed for a wide range of applications.

The TMP126 includes additional advanced features for increased reliability in harsh environments such as optional CRC checksum for data integrity, programmable alert limits, a temperature slew rate warning, and an enhanced operational temperature range. The device utilizes a NIST traceable factory calibration for guaranteed accuracy and comes in a small SOT package for close placement to heat sources along with fast response times.

Device Information
PART NUMBERPACKAGE(1)BODY SIZE (NOM)
TMP126SOT-SC70 (6)2.00 mm × 1.25 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Application
GUID-BE537FE8-51FF-428D-B0C2-8BA96AF1ADFE-low.pngAverage Temperature Accuracy

4 Revision History

Changes from Revision B (February 2022) to Revision C (June 2022)

  • Changed data sheet status from: Advanced Information to: Production DataGo
  • Removed negative slew rate reporting limitationGo
  • Removed restriction on CRC enabled writes to the configuration register.Go
  • Updated NIST Traceability descriptionGo
  • Removed auto increment limitation when writing to the configuration registerGo
  • Removed auto increment not clearing status register read limitationGo
  • Updated register map in accordance with TI guidelinesGo
  • Corrected bit range for the Reserved section of configuration register.Go

Changes from Revision A (October 2021) to Revision B (February 2022)

  • Changed the #GUID-466B2110-D8E4-45BB-BBE5-9F70AC3205A4/TITLE-SNIS209SUBSECTION_23 Go

Changes from Revision * (July 2021) to Revision A (October 2021)

  • Changed pin 2 in DCK (SC70) package from: ALERT to: GND Go
  • Changed pin 5 in DCK (SC70) package from: GND to: ALERT Go

5 Device Comparison

Table 5-1 Device Comparison
FeatureTMP126

TMP126N

TMP126-Q1

TMP127-Q1
Best accuracy

(maximum)

0.25 °C0.8 °C0.25 °C0.8 °C
Packages DCK

DCK

DBV, DCK

DBV
Continuous and shutdown mode●●●●
175°C operation●●●
Automotive Grade-0●●
NIST Traceable●●●
Alert pin functionality●●●
Slew rate warning●●●
CRC option●●●

 
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