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

7.1 LM95231 Registers

Command register selects which registers will be read from or written to. Data for this register should be transmitted during the Command Byte of the SMBus write communication.

P7P6P5P4P3P2P1P0
Command

P0-P7: Command

Table 7-1 Register Summary
NameCommand
(Hex)		Power-On Default Value
(Hex)		Read/Write# of used bitsComments
Status Register02h-RO54 status bits and 1 busy bit
Configuration Register03h00hR/W5Includes conversion rate control
Remote Diode Filter Control06h05hR/W2Controls thermal diode filter setting
Remote Diode Model Type Select30h01hR/W2Selects the 2N3904 or Pentium 4 processor on 90nm process thermal diode model
Remote Diode TruTherm Mode Control07h01h8Enables or disables TruTherm technology for Remote Diode measurements
1-shot0Fh-WO-Activates one conversion for all 3 channels if the chip is in standby mode (i.e. RUN/STOP bit = 1). Data transmitted by the host is ignored by the LM95231.
Local Temperature MSB10h-RO8
Remote Temperature 1 MSB11h-RO8
Remote Temperature 2 MSB12h-RO8
Local Temperature LSB20h-RO2All unused bits will report zero
Remote Temperature 1 LSB21h-RO3/5All unused bits will report zero
Remote Temperature 2 LSB22h-RO3/5All unused bits will report zero
Manufacturer IDFEh01hRO
Revision IDFFhA1hRO