SBOS686A June   2013  – December 2014 TMP451

PRODUCTION DATA.  

  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 Timing Requirements
    7. 6.7 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 Temperature Measurement Data
        1. 7.3.1.1 Standard Binary-to-Decimal Temperature Data Calculation Example
        2. 7.3.1.2 Standard Decimal-to-Binary Temperature Data Calculation Example
      2. 7.3.2 Series Resistance Cancellation
      3. 7.3.3 Differential Input Capacitance
      4. 7.3.4 Filtering
      5. 7.3.5 Sensor Fault
      6. 7.3.6 ALERT and THERM Functions
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (SD)
      2. 7.4.2 One-shot Mode
    5. 7.5 Programming
      1. 7.5.1 Serial Interface
        1. 7.5.1.1 Bus Overview
        2. 7.5.1.2 Bus Definitions
        3. 7.5.1.3 Serial Bus Address
        4. 7.5.1.4 Read and Write Operations
        5. 7.5.1.5 Time-out Function
        6. 7.5.1.6 High-speed Mode
        7. 7.5.1.7 General Call Reset
    6. 7.6 Register Map
      1. 7.6.1 Register Information
        1. 7.6.1.1  Pointer Register
        2. 7.6.1.2  Temperature Registers
        3. 7.6.1.3  Local Temperature High Byte Register (offset: Read = 00h; Write = N/A) [reset = 00h]
        4. 7.6.1.4  Remote Temperature High Byte Register (offset: Read = 01h; Write = N/A) [reset = 00h]
        5. 7.6.1.5  Status Register (offset: Read = 02h; Write = N/A) [reset = N/A]
        6. 7.6.1.6  Configuration Register (offset: Read = 03h; Write = 09h) [reset = 00h]
        7. 7.6.1.7  Conversion Rate Register (offset: Read = 04h; Write = 0Ah) [reset = 08h]
        8. 7.6.1.8  Local Temperature High Limit Register (offset: Read = 05h; Write = 0Bh) [reset = 55h]
        9. 7.6.1.9  Local Temperature Low Limit Register (offset: Read = 06h; Write = 0Ch) [reset = 00h]
        10. 7.6.1.10 Remote Temperature High Limit High Byte Register (offset: Read = 07h; Write = 0Dh) [reset = 55h]
        11. 7.6.1.11 Remote Temperature Low Limit High Byte Register (offset: Read = 08h; Write = 0Eh) [reset = 00h]
        12. 7.6.1.12 One-shot Start Register (offset: Read = N/A; Write = 0Fh) [reset = N/A]
        13. 7.6.1.13 Remote Temperature Low Byte Register (offset: Read = 10h; Write = N/A) [reset = 00h]
        14. 7.6.1.14 Remote Temperature Offset High Byte Register (offset: Read = 11h; Write = 11h) [reset = 00h]
        15. 7.6.1.15 Remote Temperature Offset Low Byte Register (offset: Read = 12h; Write = 12h) [reset = 00h]
        16. 7.6.1.16 Remote Temperature High Limit Low Byte Register (offset: Read = 13h; Write = 13h) [reset = 00h]
        17. 7.6.1.17 Remote Temperature Low Limit Low Byte Register (offset: Read = 14h; Write = 14h) [reset = 00h]
        18. 7.6.1.18 Local Temperature Low Byte Register (offset: Read = 15h; Write = N/A) [reset = 00h]
        19. 7.6.1.19 Remote Temperature THERM Limit Register (offset: Read = 19h; Write = 19h) [reset = 6C]
        20. 7.6.1.20 Local Temperature THERM Limit Register (offset: Read = 20h; Write = 20h) [reset = 55]
        21. 7.6.1.21 THERM Hysteresis Register (offset: Read = 21h; Write = 21h) [reset = 0Ah]
        22. 7.6.1.22 Consecutive ALERT Register (offset: Read = 22h; Write = 22h) [reset = 01h]
        23. 7.6.1.23 η-Factor Correction Register (offset: Read = 23h; Write = 23h) [reset = 00h]
        24. 7.6.1.24 Digital Filter Control Register (offset: Read = 24h; Write = 24h) [reset = 00h]
        25. 7.6.1.25 Manufacturer ID Register (offset: Read = FEh; Write = N/A) [reset = 55]
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  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

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • ±1°C Accuracy for Local and Remote Diode Sensors
  • 0.0625°C Resolution for Local and Remote Channels
  • 1.7-V to 3.6-V Supply and Logic Voltage Range
  • 27-µA Operating Current, 3-µA Shutdown Current
  • Series Resistance Cancellation
  • η-Factor and Offset Correction
  • Programmable Digital Filter
  • Diode Fault Detection
  • Two-Wire and SMBus™ Serial Interface
  • 8-Lead WSON (WDFN) Package

2 Applications

  • Processor and FPGA Temperature Monitoring
  • Smart Phones and Tablets
  • Servers, Desktops, and Notebooks
  • Telecom Equipment and Storage Area Networks (SANs)

3 Description

The TMP451 device is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors, microcontrollers, or FPGAs. The temperature is represented as a 12-bit digital code for both the local and remote sensors, giving a resolution of 0.0625°C. The temperature accuracy is ±1°C (maximum) in the typical operating range for the local and the remote temperature sensors. The two-wire serial interface accepts the SMBus communication protocol.

Advanced features such as series resistance cancellation, programmable nonideality factor (η-factor), programmable offset, programmable temperature limits, and a programmable digital filter are combined to provide a robust thermal monitoring solution with improved accuracy and noise immunity.

The TMP451 device is ideal for high-accuracy temperature measurements in multiple locations and in a variety of automotive subsystems. The device is specified for operation over a supply voltage range of 1.7 V to 3.6 V and a temperature range of –40°C to 125°C.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TMP451 WSON (8) 2.00 mm × 2.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

fpd_bos686.gif