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

Package Options

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

8.9 N-factor Correction Register

The TMP411-Q1 and TMP411D-Q1 allow for a different n-factor value to be used for converting remote channel measurements to temperature. The remote channel uses sequential current excitation to extract a differential VBE voltage measurement to determine the temperature of the remote transistor. Equation 1 relates this voltage and temperature.

Equation 1. VBE2-VBE1=nkTq×ln⁡I2I1

The value n is a characteristic of the particular transistor used for the remote channel. The default value for the TMP411-Q1 and TMP411D-Q1 devices is n = 1.008. The value in the N-Factor Correction Register can be used to adjust the effective n-factor according to Equation 2 and Equation 3.

Equation 2. neff=1.008×300300-NADJUST
Equation 3. NADJUST=300-300×1.008neff

The n-correction value must be stored in two’s-complement format, yielding an effective data range from −128 to 127, as shown in Table 8-6. The n-correction value can be written to and read from pointer address 18h. The register power-on-reset value is 00h, which is not affected unless the value is written to.

Table 8-6 N-Factor Range
NADJUSTN
BINARYHEXDECIMAL
0111 11117F1271.747977
0000 10100A101.042759
0000 10000881.035616
0000 01100661.028571
0000 01000441.021622
0000 00100221.014765
0000 00010111.011371
0000 00000001.008
1111 1111FF−11.004651
1111 1110FE−21.001325
1111 1100FC−40.994737
1111 1010FA−60.988235
1111 1000F8−80.981818
1111 0110F6−100.975484
1000 000080−1280.706542