SBAU351 April   2021

 

  1.   Trademarks
  2. 1EVM Overview
    1. 1.1 ADS127L11EVM Kit
    2. 1.2 ADS127L11EVM Board
    3. 1.3 ADS127L11EVM-PDK-GUI Unsupported Features
  3. 2EVM Analog Interface
    1. 2.1 EVM Analog Input Options
    2. 2.2 ADC Connections and Decoupling
    3. 2.3 ADC Input Drive Amplifiers
    4. 2.4 VCOM Buffer
    5. 2.5 Onboard Voltage Reference
    6. 2.6 External Voltage Reference
    7. 2.7 Clock Tree
  4. 3Digital Interface
    1. 3.1 Serial Interface (SPI)
    2. 3.2 I2C Bus for Onboard EEPROM
  5. 4Power Supplies
    1. 4.1 Power Connection and Configuration
    2. 4.2 Low Dropout Regulator (LDO)
  6. 5ADS127L11EVM Software Installation
  7. 6EVM Operation
    1. 6.1 Connecting the Hardware
    2. 6.2 Optional Connections to the EVM
    3. 6.3 EVM GUI Global Settings for ADC Control
    4. 6.4 Time Domain Display
    5. 6.5 Frequency Domain Display
    6. 6.6 Histogram Display
  8. 7Bill of Materials, Schematics, and Layout
    1. 7.1 Bill of Materials
    2. 7.2 Board Layouts
    3. 7.3 Schematics
  9. 8References

6.1 Connecting the Hardware

After installing the software, connect the EVM as shown in Figure 6-1:

  1. Physically connect P2 of the PHI to J1 of the ADS127L11EVM. Install the screws to assure a robust connection.
  2. Connect USB on PHI to the computer first.
    1. LED D5 on the PHI lights up, indicating that the PHI is powered up.
    2. LEDs D1 and D2 on the PHI start blinking to indicate that the PHI is booted up and communicating with the PC; Figure 6-1 shows the resulting LED indicators.
  3. Start the software GUI as shown in Figure 6-2. You will notice that the LEDs blink slowly as the FPGA firmware is loaded on the PHI. This loading takes a few seconds then the AVDD and DVDD power supplies will turn on.
  4. Connect the signal generator. The input range is 0 V to 5 V. A common input signal applied is a 4.9-VPP signal with a 2.5-V offset. This signal is adjusted just below the full-scale range to avoid clipping.

GUID-20210331-CA0I-XV8Q-XLBQ-4PGR41G1CGL9-low.svgFigure 6-1 Connecting the Hardware to the ADS127L11
GUID-C23C9BE0-1439-415C-B74E-374D558BB7AC-low.gifFigure 6-2 Launch the EVM GUI Software