SBOS527G December   2010  – September 2025 TMP411-Q1 , TMP411D-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 (TMP411-Q1)
    6. 6.6  Electrical Characteristics (TMP411D-Q1)
    7. 6.7  Timing Characteristics
    8. 6.8  Timing Diagrams
    9. 6.9  Typical Characteristics (TMP411-Q1)
    10. 6.10 Typical Characteristics (TMP411D-Q1)
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Series Resistance Cancellation
      2. 7.3.2 Differential Input Capacitance
      3. 7.3.3 Temperature Measurement Data
      4. 7.3.4 THERM (PIN 4) and ALERT/ THERM2 (PIN 6)
      5. 7.3.5 Sensor Fault
      6. 7.3.6 Undervoltage Lockout (TMP411-Q1 Only)
      7. 7.3.7 Filtering
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (SD)
      2. 7.4.2 One-Shot Conversion
    5. 7.5 Programming
      1. 7.5.1  Serial Interface
      2. 7.5.2  Bus Overview
      3. 7.5.3  Timing Diagrams
      4. 7.5.4  Serial Bus Address
      5. 7.5.5  Read/Write Operations
      6. 7.5.6  Time-Out Function
      7. 7.5.7  High-Speed Mode
      8. 7.5.8  General-Call Reset
      9. 7.5.9  Software Reset
      10. 7.5.10 SMBUS Alert Function
  9. 8 Register Map
    1. 8.1  Register Information
    2. 8.2  Pointer Register
    3. 8.3  Temperature Registers
    4. 8.4  Limit Registers
    5. 8.5  Status Register
    6. 8.6  Configuration Register
    7. 8.7  Resolution Register
    8. 8.8  Conversion Rate Register
    9. 8.9  N-factor Correction Register
    10. 8.10 Minimum and Maximum Registers
    11. 8.11 Consecutive Alert Register
    12. 8.12 THERM Hysteresis Register
    13. 8.13 Identification Registers
  10. 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 Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

8.4 Limit Registers

The TMP411-Q1 and TMP411D-Q1 have 11 registers for setting comparator limits for both the local and remote measurement channels. These registers have read and write capability. The High and Low Limit Registers for both channels span two registers, as do the temperature registers. The local temperature high limit is set by writing the high byte to pointer address 0Bh and writing the low byte to pointer address 16h, or by using a single two-byte write command (high byte first) to pointer address 0Bh. The local temperature high limit is obtained by reading the high byte from pointer address 05h and the low byte from pointer address 16h or by using a two-byte read command from pointer address 05h. The power-on-reset value of the local temperature high limit is 55h/6Eh/00h (85°C in standard temperature mode for TMP411A-Q1/TMP411DA-Q1 to TMP411C-Q1/TMP411DC-Q1; 110°C in standard temperature mode for TMP411D-Q1/TMP411DD-Q1, 21°C in extended temperature range).

Similarly, the local-temperature low limit is set by writing the high byte to pointer address 0Ch and writing the low byte to pointer address 17h, or by using a single two-byte write command to pointer address 0Ch. The local temperature low limit is read by reading the high byte from pointer address 06h and the low byte from pointer address 17h, or by using a two-byte read from pointer address 06h. The power-on-reset value of the local temperature low limit register is 00h/00h (0°C in standard temperature mode; –64°C in extended mode).

The remote temperature high limit is set by writing the high byte to pointer address 0Dh and writing the low byte to pointer address 13h, or by using a two-byte write command to pointer address 0Dh. The remote temperature high limit is obtained by reading the high byte from pointer address 07h and the low byte from pointer address 13h, or by using a two-byte read command from pointer address 07h. The power-on-reset value of the Remote Temperature High Limit Register is 55h/6Eh/00h (85°C in standard temperature mode for TMP411A-Q1/TMP411DA-Q1 to TMP411C-Q1/TMP411DC-Q1; 110°C in standard temperature mode for TMP411D-Q1/TMP411DD-Q1, 21°C in extended temperature mode).

The remote temperature low limit is set by writing the high byte to pointer address 0Eh and writing the low byte to pointer address 14h, or by using a two-byte write to pointer address 0Eh. The remote temperature low limit is read by reading the high byte from pointer address 08h and the low byte from pointer address 14h, or by using a two-byte read from pointer address 08h. The power-on-reset value of the Remote Temperature Low Limit Register is 00h/00h (0°C in standard temperature mode, –64°C in extended mode).

The TMP411-Q1 and TMP411D-Q1 also have THERM limit registers for both the local and the remote channels. These registers are eight bits and allow for THERM limits set to 1°C resolution. The local channel THERM limit is set by writing to the pointer address 20h. The remote channel THERM limit is set by writing to the pointer address 19h. The local channel THERM limit is obtained by reading from pointer address 20h, and the remote channel THERM limit is read from pointer address 19h. The power-on-reset value of the THERM limit registers is 55h/6Eh/00h (85°C in standard temperature mode for TMP411A-Q1/TMP411DA-Q1 to TMP411C-Q1/TMP411DC-Q1; 110°C in standard temperature mode for TMP411D-Q1/TMP411DD-Q1; 21°C in extended temperature mode). The THERM limit comparators also have hysteresis. The hysteresis of both comparators is set by writing to the pointer address 21h. The hysteresis value is obtained by reading from pointer address 21h. The Hysteresis Register value is an unsigned number (always positive). The power-on-reset value of this register is 0Ah (10°C).

Whenever changing between standard and extended temperature ranges, note that the temperatures stored in the temperature limit registers are not automatically reformatted to correspond to the new temperature range format. These values must be reprogrammed in the appropriate binary or extended binary format.