SBOS821 November   2016 TMP421-Q1 , TMP422-Q1 , TMP423-Q1

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Temperature Measurement Data
      2. 8.3.2 Remote Sensing
      3. 8.3.3 Series Resistance Cancellation
      4. 8.3.4 Differential Input Capacitance
      5. 8.3.5 Filtering
      6. 8.3.6 Sensor Fault
      7. 8.3.7 Undervoltage Lockout
      8. 8.3.8 Timeout Function
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode (SD)
    5. 8.5 Programming
      1. 8.5.1  Serial Interface
      2. 8.5.2  Bus Overview
      3. 8.5.3  Bus Definitions
      4. 8.5.4  Serial Bus Address
      5. 8.5.5  Two-Wire Interface Slave Device Addresses
      6. 8.5.6  Read and Write Operations
      7. 8.5.7  High-Speed Mode
      8. 8.5.8  One-Shot Conversion
      9. 8.5.9  η-Factor Correction Register
      10. 8.5.10 Software Reset
      11. 8.5.11 General Call Reset
      12. 8.5.12 Identification Registers
    6. 8.6 Register Maps
      1. 8.6.1 Pointer Register
      2. 8.6.2 Temperature Registers
      3. 8.6.3 Status Register
      4. 8.6.4 Configuration Register 1
      5. 8.6.5 Configuration Register 2
      6. 8.6.6 Conversion Rate Register
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TMP421-Q1 Basic Connections
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curve
      2. 9.2.2 TMP422-Q1 Basic Connections
      3. 9.2.3 TMP423-Q1 Basic Connections
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Measurement Accuracy and Thermal Considerations
  12. 12Device and Documentation Support
    1. 12.1 Related Links
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

1 Features

  • AEC-Q100 Qualified with the Following Results
    • Temperature Grade 1: –40°C to +125°C
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C5
  • SOT23-8 Package
  • ±1°C Remote Diode Sensor (Maximum)
  • ±1.5°C Local Temperature Sensor (Maximum)
  • Series Resistance Cancellation
  • n-Factor Correction
  • Two-Wire I2C or SMBus™ Compatible Serial Interface
  • Multiple Interface Addresses
  • Diode Fault Detection
  • RoHS Compliant and No Sb/Br

2 Applications

  • Processor and FPGA Temperature Monitoring
  • LCD, DLP, and LCOS Projectors
  • Servers
  • Central Office Telecom Equipment
  • Storage Area Networks (SAN)

3 Description

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 devices are single, dual, and triple remote, automotive-qualified temperature sensor monitors with a built-in local temperature sensor. The remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or field-programmable gate arrays (FPGAs).

Remote accuracy is ±1°C for multiple device manufacturers, with no calibration needed. The two-wire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 include series resistance cancellation, programmable non-ideality factor, wide remote temperature
measurement range (up to +150°C), and diode fault detection.

The TMP421-Q1, TMP422-Q1, and TMP423-Q1 are all available in an 8-pin SOT-23 package.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TMP421-Q1
TMP422-Q1
TMP423-Q1		 SOT-23 (8) 2.90 mm × 1.63 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Diode Input Configurations for the TMP421-Q1, TMP422-Q1, and TMP423-Q1

TMP421-Q1 TMP422-Q1 TMP423-Q1 ai_basic_conx_all_sbos821.gif