SWRA640G December   2018  – September 2022 CC1310 , CC1312R , CC1314R10 , CC1350 , CC1352P , CC1352R , CC1354P10 , CC1354R10 , CC2620 , CC2630 , CC2640 , CC2640R2F , CC2640R2F-Q1 , CC2642R , CC2642R-Q1 , CC2650 , CC2652P , CC2652R , CC2652R7 , CC2652RB , CC2652RSIP , CC2662R-Q1 , CC2674P10 , CC2674R10

 

  1.   Trademarks
  2.   CC13xx/CC26xx Hardware Configuration and PCB Design Considerations
  3. 1 Reference Design
    1. 1.1 Sub-1 GHz LaunchPads
      1. 1.1.1 LAUNCHXL-CC1310
      2. 1.1.2 LAUNCHXL-CC1312R
    2. 1.2 2.4 GHz LaunchPads
      1. 1.2.1 LAUNCHXL-CC2640R2
      2. 1.2.2 LAUNCHXL-CC26x2R
    3. 1.3 Dual-Band LaunchPads
      1. 1.3.1 LAUNCHXL-CC1350EU/US
      2. 1.3.2 LAUNCHXL-CC1350-4
      3. 1.3.3 LAUNCHXL-CC1352R
      4. 1.3.4 LAUNCHXL-CC1352P1
      5. 1.3.5 LAUNCHXL-CC1352P-2
      6. 1.3.6 LAUNCHXL-CC1352P-4
    4. 1.4 Reference Design Overview
  4. 2 Front-End Configurations
    1. 2.1 CC13xx/CC26xx
    2. 2.2 Configuring Front-End Mode
    3. 2.3 CC13xx Single-Ended Mode
      1. 2.3.1 Single-Ended RX/TX
      2. 2.3.2 Single-Ended TX Only
      3. 2.3.3 Single-Ended RX Only
      4. 2.3.4 Single-Ended 2.4 GHz
    4. 2.4 CC26xx
  5. 3 Schematic
    1. 3.1 Schematic Overview
      1. 3.1.1 24/48 MHz Crystal
      2. 3.1.2 32.768 kHz Crystal
      3. 3.1.3 Balun
      4. 3.1.4 Filter
      5. 3.1.5 RX_TX Pin
      6. 3.1.6 Decoupling Capacitors
      7. 3.1.7 Antenna Components
      8. 3.1.8 RF Shield
      9. 3.1.9 I/O Pins Drive Strength
    2. 3.2 Bootloader Pins
    3. 3.3 AUX Pins
      1. 3.3.1 CC26x2/CC13x2 AUX Pins
      2. 3.3.2 CC26x0/CC13x0 AUX Pins
    4. 3.4 JTAG Pins
  6. 4 PCB Layout
    1. 4.1  Board Stack-Up
    2. 4.2  Balun
    3. 4.3  LC Filter
    4. 4.4  Decoupling Capacitors
    5. 4.5  Placement of Crystal Load Capacitors
    6. 4.6  Current Return Path
    7. 4.7  DC/DC Regulator
    8. 4.8  Antenna Matching Components
    9. 4.9  Transmission Lines
    10. 4.10 Electromagnetic Simulation
  7. 5 Antenna
    1. 5.1 Single-Band Antenna
    2. 5.2 Dual-Band Antenna
      1. 5.2.1 Dual-Band Antenna Match Example: 863-928 MHz and 2.4 GHz
      2. 5.2.2 Dual-Band Antenna Match: 433-510 MHz and 2.4 GHz
  8. 6 Crystal Tuning
    1. 6.1 CC13xx/CC26xx Crystal Oscillators
    2. 6.2 Crystal Selection
    3. 6.3 Tuning the LF Crystal Oscillator
    4. 6.4 Tuning the HF Oscillator
  9. 7 TCXO Support
    1. 7.1 Hardware
    2. 7.2 Software
    3. 7.3 Example: Usage of TCXO on CC1312R Launchpad
  10. 8 Integrated Passive Component (IPC)
  11. 9 Optimum Load Impedance
  12. 10PA Table
  13. 11Power Supply Configuration
    1. 11.1 Introduction
    2. 11.2 DC/DC Converter Mode
    3. 11.3 Global LDO Mode
    4. 11.4 External Regulator Mode
  14. 12Board Bring-Up
    1. 12.1 Power On
    2. 12.2 RF Test: SmartRF Studio
    3. 12.3 RF Test: Conducted Measurements
      1. 12.3.1 Sensitivity
      2. 12.3.2 Output Power
    4. 12.4 Software Bring-Up
    5. 12.5 Hardware Troubleshooting
      1. 12.5.1 No Link: RF Settings
      2. 12.5.2 No Link: Frequency Offset
      3. 12.5.3 Poor Link: Antenna
      4. 12.5.4 Bluetooth Low Energy: Device Does Advertising But Can Not Connect
      5. 12.5.5 Poor Sensitivity: DCDC Layout
      6. 12.5.6 Poor Sensitivity: Background noise
      7. 12.5.7 High Sleep Power Consumption
  15. 13References
  16. 14Revision History

5.1 Single-Band Antenna

The existing antenna documentation available at TI is mainly orientated towards antennas that operate at a single frequency. Two antenna selection guides are available: the Antenna Selection Quick Guide and a comprehensive Antenna Selection Guide. In addition to the documentation, there is a CC-Antenna-DK2 and Antenna Measurements Summary available on TI’s eStore, as well, with complete documentation. All antenna documentation that is available from TI can be accessed from the Antenna Selection Quick Guide since it contains hyperlinks to all antenna documentation, antenna measurement reports, and all antenna reference designs.

It is always advised to include an antenna matching network in order to tune and to reduce the mismatch losses of the antenna. For a single-band antenna, the recommendation is to always include a pi-match network prior to the antenna, see Figure 5-1. Only two of the three footprints/components are required. The impedance of the antenna will determine if footprint/component ANT1 or ANT3 is used. ANT2 will always be used and even if the antenna is perfectly matched, then this can just be set as a 0 Ω resistor.

GUID-C2D796EF-D596-4AB0-96DB-E8A98F7F6609-low.gif Figure 5-1 Recommended Antenna PI-Match Network for Single-Band Antennas