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

2.3.2 Digital Temperature Sensor - TMP117

The TMP117 device is a family of low-power, high-precision temperature sensors with integrated EEPROM memory. The TMP117 device provides a 16-bit temperature result with a resolution of 0.0078125°C and an accuracy of up to ±0.1°C with no calibration. The TMP117 is I2C- and SMBus-interface compatible, has programmable alert functionality, and can support up to four devices on a single bus.

The TMP117 device consumes minimal current that, in addition to providing power savings, minimizes the self-heating effect while measuring temperature and improves measurement accuracy. The TMP117 operates from 1.8 V to 5.5 V and typically consumes 3.5 μA during the conversion cycle and 150nA during shutdown. The device also has integrated 48 bit EEPROM. Across its full operating temperature range the TMP117 device achieves the accuracy of a Class A RTD without calibration and requires significantly less processing software by dropping the need for the voltage to temperature measurement conversion and subsequent offset and gain result adjustment. In addition, the extern-al analog signal chain circuitry, with the precision reference resistor, analog input matched RC-filters and the impedance matched traces on the PCB are completely eliminated.

GUID-20200806-CA0I-XRRB-JSKH-MJPKP2DZNWXL-low.pngFigure 2-2 TMP117 Internal Block Diagram.