SLAU873C January   2023  – January 2024

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Getting Started
    1. 1.1 Introduction
    2. 1.2 Key Features
    3. 1.3 What's Included
      1. 1.3.1 Kit Contents
      2. 1.3.2 Software Examples
    4. 1.4 First Step: Out-of-Box Experience
      1. 1.4.1 Connecting to the Computer
      2. 1.4.2 Running the Out-of-Box Experience
    5. 1.5 Next Steps: Looking Into the Provided Code
  5. 2Hardware
    1. 2.1 Jumper Map
    2. 2.2 Block Diagram
    3. 2.3 Hardware Features
      1. 2.3.1 MSPM0G3507 MCU
      2. 2.3.2 XDS110-ET Onboard Debug Probe With EnergyTrace Technology
      3. 2.3.3 Debug Probe Connection Isolation Jumper Block
      4. 2.3.4 Application (or Backchannel) UART
      5. 2.3.5 Using an External Debug Probe Instead of the Onboard XDS110-ET
      6. 2.3.6 Using the XDS110-ET Debug Probe With a Different Target
      7. 2.3.7 Special Features
        1. 2.3.7.1 Up to 4-Msps High-Speed Analog-to-Digital Converter
        2. 2.3.7.2 Thermistor
        3. 2.3.7.3 Light Sensor
    4. 2.4 Power
      1. 2.4.1 XDS110-ET USB Power
    5. 2.5 External Power Supply and BoosterPack Plug-in Module
    6. 2.6 Measure Current Draw of the MSPM0 MCU
    7. 2.7 Clocking
    8. 2.8 BoosterPack Plug-in Module Pinout
  6. 3Software Examples
  7. 4Resources
    1. 4.1 Integrated Development Environments
      1. 4.1.1 TI Cloud Development Tools
      2. 4.1.2 TI Resource Explorer Cloud
      3. 4.1.3 Code Composer Studio Cloud
      4. 4.1.4 Code Composer Studio IDE
    2. 4.2 MSPM0 SDK and TI Resource Explorer
    3. 4.3 MSPM0G3507 MCU
      1. 4.3.1 Device Documentation
      2. 4.3.2 MSPM0G3507 Code Examples
    4. 4.4 Community Resources
      1. 4.4.1 TI E2E™ Forums
  8. 5Schematics
  9. 6Revision History

2.3.7.2 Thermistor

The LaunchPad kit includes a 10k linear thermistor (PTC), the TMP6131. Figure 2-8 shows the circuit. The PTC is in a low-side configuration with a 10kΩ 10ppm pullup resistor. The default position of the jumper in the header (1-2 position) connects this circuit directly to the ADC. In this mode, the output voltage is approximately 1.6V at room temperature.

The jumper can also be set to the 2-3 position to allow an OPA connection to the thermistor. The OPA output can be connected internally, through software, to the negative OPA terminal. This allows the OPA to be used as a buffer for the thermistor with an internal connection to an ADC channel for sampling. If an external connection or additional biasing or filtering is wanted, then the passives shown in Figure 2-8 need to be populated.

Note: The capacitor and resistor network associated with the OPA is not populated by default. This allows the user to populate with passive values to fit the specific application needs.
Note: When using the OPA and the passive network, be sure to check for conflicts with other pins on the LaunchPad kit because pins are multiplexed with several functions.
GUID-20221215-SS0I-KVGK-1GMJ-2GW4MVVF6NQM-low.png Figure 2-8 Thermistor Circuit