Power Amplifier (PA) Utility#

RAIL PA Utility#

This optional software component can be enabled to include default functionality related to PA configuration.

When using a Silicon Labs-developed board, the configuration options for this software component are set up automatically based on the selected board. When using a custom board, manually configure the configuration options.

Configuration Options#

The following configuration options can be changed:

• PA Configuration

  • Initial PA power

  • PA ramp time

    • PA ramp time is a hardware approximation aimed at being as close to the desired ramp time as possible without going over the specified time.

  • Milli-volts provided to the PA supply pin (PA_VDD)

  • 2.4 GHz PA selection (for applicable devices)

  • Sub-1 GHz PA selection (for applicable devices)

• PA Curve Configuration

  • Header file containing custom PA curves

  • Header file containing PA curve type types

• PA Calibration Configuration

  • Apply PA Calibration Factory Offset

    • PA calibration offset ensures that PA power remains consistent chip-to-chip. These adjustments occur automatically when the PA is in use, and the application is not notified when these adjustments occur.

See these documents for in-depth explanations of how to configure and use the available PA features:

• AN1127: Power Amplifier Power Conversion Functions in RAIL 2.x