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

3.1.1 Hardware

The TIDA-010002 board was initially tested for proper operation using the USB2ANY Interface Adapter, which features I2C-bus protocol support. Both read and write slave access to the TMP117 was verified after correct wiring of the VDD, GND, SDA, and SCL lines between the TIDA-0100012 design and USB2ANY tool.

The fully assembled probes with TIDA-010002 inside, as shown in Figure 3-1, were used for testing. These digital temperature probes (see the 4-wire white cable with 6 m length as an example) were produced by JUMO GmbH & Co. KG in Germany. JUMO is a market leader in the development of industrial temperature probes for a variety of applications, including residential and commercial heat meters. JUMO can be contacted with inquiries about digital temperature probes based upon TIDA-010002 at HeatMeter@jumo.net.

Next, the full TIDA-010002 based digital probe was attached to the MSP430FR6047 Ultrasonic Sensing Evaluation Module using the BoosterPack™ Plug-in Module extension connectors J5 and J6. Table 3-1 shows the four connections required, where the VDD for the digital temperature sensor can be provided continuously or by a GPIO pin for easy power-on and off.

Table 3-1 Wiring Scheme for MSP430FR6047EVM and TIDA-010002
MSP430FR6047EVMTIDA-010002COMMENT
SCL (J5.17)SCLI2C from eUSCI_B0
SDA (J5.19)SDAI2C from eUSCI_B0
GND (J6.2)GND
GPIO P8.0 (J6.18)VDD on/offused for power cycling of the first DRTD
GPIO P7.5 (J6.20)VDD on/offused for power cycling of the second DRTD
VDD (J5.1)VDDalternative to GPIO8.0; used for continuous powering of DRTD