SNIS139F February   2005  – January 2024 LM95231

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Operating Ratings
    3. 5.3 Temperature-to-Digital Converter Characteristics
    4. 5.4 Logic Electrical Characteristics Digital DC Characteristics
    5. 5.5 Logic Electrical Characteristics SMBus Digital Switching Characteristics
    6. 5.6 Typical Performance Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Conversion Sequence
      2. 6.3.2 Power-On-Default States
      3. 6.3.3 SMBus Interface
      4. 6.3.4 Temperature Data Format
      5. 6.3.5 SMBDAT Open-Drain Output
      6. 6.3.6 Diode Fault Detection
      7. 6.3.7 Communicating with the LM95231
      8. 6.3.8 Serial Interface Reset
      9. 6.3.9 One-Shot Conversion
  8. 7 Registers
    1. 7.1 LM95231 Registers
    2. 7.2 Status Register
    3. 7.3 Configuration Register
    4. 7.4 Remote Diode Filter Control Register
    5. 7.5 Remote Diode Model Type Select Register
    6. 7.6 Remote TruTherm Mode Control
    7. 7.7 Local and Remote MSB and LSB Temperature Registers
      1. 7.7.1 Local Temperature MSB
      2. 7.7.2 Local Temperature LSB
      3. 7.7.3 Remote Temperature MSB
      4. 7.7.4 Remote Temperature LSB
    8. 7.8 Manufacturers ID Register
    9. 7.9 Die Revision Code Register
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Diode Non-Ideality
        1. 8.2.1.1 Diode Non-Ideality Factor Effect on Accuracy
        2. 8.2.1.2 Calculating Total System Accuracy
        3. 8.2.1.3 Compensating for Different Non-Ideality
  10. 9 Layout
    1. 9.1 PCB Layout for Minimizing Noise
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
    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

7.2 Status Register

D7D6D5D4D3D2D1D0
BusyReservedR2TMER1TMERD2MRD1M
000
BitsNameDescription
7BusyWhen set to "1" the part is converting.
6-4ReservedReports "0" when read.
3Remote 2 TruTherm Mode Enabled (R2TME)When set to "1" indicates that the TruTherm Mode has been activated for Remote diode 2. After being enabled TruTherm Mode will take at most one conversion cycle to be fully active.
2Remote 1 TruTherm Mode Enabled (R2TME)When set to "1" indicates that the TruTherm Mode has been activated for Remote diode 1. After being enabled TruTherm Mode will take at most one conversion cycle to be fully active.
1Remote Diode 2 Missing (RD2M)When set to "1" Remote Diode 2 is missing. (i.e. D2+ shorted to VDD, Ground or D2-, or D2+ is floating). Temperature Reading is FFE0h which converts to 255.875 °C if unsigned format is selected or 8000h which converts to –128.000 °C if signed format is selected. Note, connecting a 2N3904 transistor to Remote 2 inputs with TruTherm mode active may also cause this bit to be set.
0Remote Diode 1 Missing (RD1M)When set to "1" Remote Diode 1 is missing. (i.e. D1+ shorted to VDD, Ground or D1-, or D1+ is floating). Temperature Reading is FFE0h which converts to 255.875 °C if unsigned format is selected or 8000h which converts to –128.000 °C if signed format is selected. Note, connecting a 2N3904 transistor to Remote 1 inputs with TruTherm mode active may also cause this bit to be set.