SBAU353 October   2021

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 ADS131A04EVM Kit
    2. 1.2 ADS131A04EVM Board
  3. 2ADS131A04EVM Quick Start Guide
  4. 3EVM Analog Interface
    1. 3.1 ADC Analog Input Signal Path
    2. 3.2 ADC External Clock (XTAL1/CLKIN and XTAL2) Options
  5. 4Digital Interface
    1. 4.1 SPI Communication
    2. 4.2 Connection to the PHI
    3. 4.3 Digital Header
    4. 4.4 LaunchPad Connectors
  6. 5Power Supplies
  7. 6ADS131A04EVM Initial Setup
    1. 6.1 Default Jumper Settings
    2. 6.2 EVM Graphical User Interface (GUI) Software Installation
  8. 7ADS131A04EVM Software Reference
    1. 7.1 EVM GUI Global Settings for ADC Control
    2. 7.2 Register Map Configuration Tool
    3. 7.3 Time Domain Display Tool
    4. 7.4 Spectral Analysis Tool
    5. 7.5 Histogram Tool
  9. 8ADS131A04EVM Bill of Materials, PCB Layout, and Schematic
    1. 8.1 Bill of Materials
    2. 8.2 PCB Layout
    3. 8.3 Schematic
  10. 9References

6.1 Default Jumper Settings

After unpacking, the EVM is already configured with the default jumper settings. Figure 6-1 shows the locations for the default jumpers.

Figure 6-1 ADS131A04EVM Jumper Default Settings

The default position of the JP1 jumper ties VNCP, the negative charge pump, to AVSS to effectively disable it. The negative charge pump can also be disabled by setting VNCPEN to 0b0, which is the default value on power up. The default position of JP2 (labeled VREF in silkscreen) connects the REF5025, which outputs 2.5-V, to the REFEXT pin of the ADS131A04.

JP3 sets the EVM in unipolar supply mode by default, where AVDD = 3.3-V and AVSS = 0-V or GND. Specifically, the jumper covers pins 1 and 2 of JP3.

Table 6-1 Default Settings
JumperPositionFunction
JP1[1-2]Disables negative charge pump
JP2[1-2]Connects 2.5-V t0 REFEXT with respect to AVSS
JP3[1-2]Sets AVSS to GND for unipolar supply mode
JP4Not installedHeader to supply external clock