TIDUEA0A March   2019  – September 2020

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
    1. 1.1 Key System Specifications
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 Device Recommendation
      2. 2.3.2 Digital Temperature Sensor - TMP117
      3. 2.3.3 Digital Temperature Sensor - TMP116
      4. 2.3.4 ESD Protection Devices
    4. 2.4 System Design Theory
      1. 2.4.1 PT100, PT500, PT1000 based Measurement in Heat Meters
      2. 2.4.2 TMP117 Configuration as Temperature Sensor
      3. 2.4.3 Digital RTD Solution Using TMP117
      4. 2.4.4 Ambient Temperature Considerations
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Interface Test Software for TMP116
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup for Performance Testing
      2. 3.2.2 EMI and EMC Test Requirements for DRTD
      3. 3.2.3 TMP117 EMI/EMC Test Results
      4. 3.2.4 TMP117 Based Temperature Probe Measurement Performance Test Results
      5. 3.2.5 TMP116 Based Temperature Probe Measurement Performance Test Results
      6. 3.2.6 I2C-bus Cable Length Considerations
      7. 3.2.7 Power Supply
      8. 3.2.8 ESD Test Results for TMP116
      9. 3.2.9 Summary
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks
  12. 7About the Author
  13. 8Revision History

2.3.4 ESD Protection Devices

The ESD351 device is a unidirectional TVS ESD protection diode featuring low dynamic resistance RDYN and low clamping voltage. The ESD351 is rated to dissipate ESD strikes up to the 30 kV (contact and air) level per the IEC 61000-4-2 standard. The ultra-low dynamic resistance (0.1 Ω) and extremely low clamping voltage (6.5 V at 16-A TLP) ensure system-level protection against transient events. This device has a capacitance of 1.8 pF (typical) making it ideal for protecting interfaces. The ESD351 is offered in the industry-standard 0402 (DPY) package and is convenient for component placement in space-saving applications. The small package size has been a key decision factor for selecting ESD351 in this extremely space constraint application.

GUID-44AEB233-25EC-40E1-8D5D-2931FF43AFC9-low.pngFigure 2-4 ESD351 Functional Block Diagram

The ESD351 is a diode-type TVS which is used to provide a path to ground for dissipating ESD events on high-speed signal lines between a human interface connector and a system. As the current from ESD passes through the TVS, only a small voltage drop is present across the diode and is the voltage presented to the protected IC.

The ESD351 device supports the industrial temperature range: –40°C to +125°C, the recommended input voltage VIN is between 0 and 3.6 V.

The TPD1E04U04 device is a unidirectional TVS ESD protection diode rated to dissipate ESD strikes above the maximum level specified in the IEC 61000-4-2 international standard (Level 4). The low dynamic resistance and ultra-low clamping voltage ensure system level protection against transient events for sensitive SoC. The TPD1E04U04 is offered in the industry standard 0402 (DPY) and 0201 (DPL) packages and also supports the industrial temperature range: –40°C to +125°C.