SWRU546E October   2018  – May 2022 AWR6843 , AWR6843AOP , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   Trademarks
  2. 1Getting Started
    1. 1.1 Introduction
    2. 1.2 Key Features
      1. 1.2.1 Summary of Features
      2. 1.2.2 xWR6843ISK
      3. 1.2.3 IWR6843ISK-ODS (Overhead Detection Sensing)
      4. 1.2.4 IWR6843AOP
      5. 1.2.5 MMWAVEICBOOST
    3. 1.3 What’s Included
      1. 1.3.1 Kit Contents
        1. 1.3.1.1 xWR6843ISK
        2. 1.3.1.2 IWR6843ISK-ODS
        3. 1.3.1.3 IWR6843AOPEVM
        4. 1.3.1.4 MMWAVEICBOOST
  3. 2MMWAVEICBOOST
    1. 2.1 Hardware
    2. 2.2 Block Diagram and Features
      1. 2.2.1 Block Diagram
      2. 2.2.2 Hardware Features
    3. 2.3 Muxing Scheme for Multiple Sources
    4. 2.4 Using the MMWAVEICBOOST With the Starter Kit
      1. 2.4.1 PC Connection
      2. 2.4.2 Flashing the QSPI Flash on the Antenna Module
      3. 2.4.3 MMWAVEICBOOST and Antenna Module Connections for Modular Testing
    5. 2.5 Interfacing with the DCA1000EVM
      1. 2.5.1 mmWave Studio Interface
      2. 2.5.2 MMWAVEICBOOST and Antenna Module Configuration
      3. 2.5.3 DCA1000 EVM Connection
    6. 2.6 Power Connections
    7. 2.7 Connectors
      1. 2.7.1 20-Pin LaunchPad and Booster Pack Connectors (J5, J6)
      2. 2.7.2 60-Pin High Density (HD) Connector (J4 and J17)
      3. 2.7.3 60-Pin High Density (HD) Connector (J10)
      4. 2.7.4 MIPI 60-Pin Connector (J9)
      5. 2.7.5 TI 14-Pin JTAG Connector (J19)
      6. 2.7.6 CAN Connector (J1 and J2)
      7. 2.7.7 Ultra-Miniature Coaxial Connector (J3)
    8. 2.8 Jumpers, Switches and LEDs
      1. 2.8.1 Sense on Power (SOP) Jumpers
      2. 2.8.2 I2C Connections
        1. 2.8.2.1 Default I2C Address
        2. 2.8.2.2 43
        3. 2.8.2.3 3.3-V Rail Options
        4. 2.8.2.4 Miscellaneous Headers
        5. 2.8.2.5 Switches and LEDs
          1. 2.8.2.5.1 Switches
  4. 3xWR6843ISK / IWR6843ISK-ODS REV C
    1. 3.1  Hardware
      1. 3.1.1 xWR6843ISK EVM
      2. 3.1.2 IWR6843ISK-ODS EVM
    2. 3.2  xWR6843ISK/IWR6843ISK-ODS Block Diagram
    3. 3.3  PCB Storage and Handling Recommendations
    4. 3.4  Power Connections
      1. 3.4.1 Higher Power Applications
    5. 3.5  Interfaces
      1. 3.5.1 Switches, Buttons and Muxes
      2. 3.5.2 List of LEDs
      3. 3.5.3 CANFD
      4. 3.5.4 I2C Connections
        1. 3.5.4.1 EEPROM
        2. 3.5.4.2 Default I2C Address
    6. 3.6  xWR6843ISK Antenna
    7. 3.7  IWR6843ISK-ODS Antenna
    8. 3.8  Modular Mode
    9. 3.9  DCA1000EVM Mode
    10. 3.10 MMWAVEICBOOST Mode
  5. 4xWR6843AOPEVM Rev G
    1. 4.1  Hardware
    2. 4.2  Block Diagram
    3. 4.3  PCB Storage and Handling Recommendations
    4. 4.4  Heat Sink and Temperature
    5. 4.5  xWR6843AOPEVM Antenna
    6. 4.6  Switch Settings
    7. 4.7  xWR6843AOPEVM Muxing Scheme
      1. 4.7.1 SOP Configuration
    8. 4.8  Modular, DCA1000EVM and MMWAVEICBOOST Mode
      1. 4.8.1 Modular Mode
      2. 4.8.2 DCA1000EVM Mode
      3. 4.8.3 MMWAVEICBOOST Mode
    9. 4.9  Known Issues: Spurious Performance
    10. 4.10 PC Connection
      1. 4.10.1 Installing the Drivers
      2. 4.10.2 Flashing the Board
    11. 4.11 REACH Compliance
    12. 4.12 Regulatory Statements with Respect to the xWR6843AOPEVM Rev G
  6. 5xWR6843AOPEVM Rev F
    1. 5.1  Hardware
    2. 5.2  Block Diagram
    3. 5.3  PCB Storage and Handling Recommendations
    4. 5.4  Heat Sink and Temperature
    5. 5.5  xWR6843AOPEVM Antenna
    6. 5.6  Switch Settings
    7. 5.7  xWR6843AOPEVM Muxing Scheme
      1. 5.7.1 SOP Configuration
    8. 5.8  Modular and MMWAVEICBOOST Mode
      1. 5.8.1 Modular Mode
      2. 5.8.2 MMWAVEICBOOST Mode
    9. 5.9  PC Connection
      1. 5.9.1 Installing the Drivers
      2. 5.9.2 Flashing the Board
      3. 5.9.3 DCA1000
    10. 5.10 REACH Compliance
  7. 6IWR6843ISK / IWR6843ISK-ODS (deprecated)
    1. 6.1 Hardware
      1. 6.1.1 IWR6843ISK EVM
      2. 6.1.2 IWR6843ISK-ODS EVM
    2. 6.2 IWR6843ISK/IWR6843ISK-ODS Block Diagram
    3. 6.3 PCB Storage and Handling Recommendations
    4. 6.4 Power Connections
    5. 6.5 Miscellaneous and LEDs
      1. 6.5.1 List of LEDs
      2. 6.5.2 I2C Connections
        1. 6.5.2.1 EEPROM
        2. 6.5.2.2 Default I2C Address
    6. 6.6 IWR6843ISK Antenna
    7. 6.7 IWR6843ISK-ODS Antenna
  8. 7IWR6843AOPEVM (Deprecated)
    1. 7.1 Hardware
    2. 7.2 Block Diagram
    3. 7.3 PCB Storage and Handling Recommendations
    4. 7.4 IWR6843AOPEVM Antenna
    5. 7.5 Switch Settings
    6. 7.6 IWR6843AOPEVM Muxing Scheme
      1. 7.6.1 SOP Configuration
    7. 7.7 Modular and MMWAVEICBOOST Mode
      1. 7.7.1 Modular Mode
      2. 7.7.2 MMWAVEICBOOST Mode
    8. 7.8 PC Connection
      1. 7.8.1 Installing the Drivers
      2. 7.8.2 Flashing the Board
      3. 7.8.3 DCA1000
    9. 7.9 REACH Compliance
  9. 8TI E2E Community
  10. 9Certification Related Information
  11.   Revision History

4.9 Known Issues: Spurious Performance

A power vs frequency plot of the raw ADC data captured with DCA100EVM shows a spur near 4MHz that is 12dB above the ADC noise floor. This spur degrades the available spur- free dynamic range (SFDR) of the frontend receiver.

The spur is as a result of the switching of the power module device (LP87524) at 4MHz which couples via the power supplies of the IWR6843AOP device.

The power module device (LP87524) has a feature to enable spread spectrum which can be leveraged to reduce the level of the spur. More on spread spectrum can be found in section 7.3.1.4 of the LP87524 data sheet. Enabling spread spectrum mode is recommended and it has the effect of reducing the spur level by 10dB, lowering the noise spectral density and shfting the spur frequency from 4MHz to 3.89MHz.

Spread spectrum mode can be enabled by writing the following to the I2C interface of the power module:

  • Write 0x01 to register address 0x2B, I2C address = 0x60

  • Write 0xD6 to register address 0x2C, I2C address = 0x60

For help enabling the spread spectrum mode, contact TI support through E2E.

GUID-20210907-SS0I-HF3R-WSTZ-8X9P8RB0K5TL-low.png Figure 4-18 ADC spectrum with spread spectrum enabled (blue) vs disabled (red)