1 ATWINC15x0 Gain Stages

The following are three stages of amplification in the transmitter:
  1. Digital Gain (DG)
  2. Pre-Power Amplifier (PPA)
  3. Power Amplifier (PA)
  • DG Stage:
    • The DG stage is the one to adjust to set the desired output power. The DG values are configured with the negative sign.
    • The DG gain is controlled across all channels, 1 to 14, and across all data rates for b, g and n modes of transmissions.
    • This DG gain allows the designer to adjust the output power to the desired output to meet the IEEE 802.11 specifications and to meet the required regulatory specification.

    • Each DG step is equivalent to approximately a 1 dB change in RF output power. For example, if DG is -7 for a given data rate and channel, and if there is a need to increase transmit power, DG must be configured with a value of -6 or higher.

  • PPA and PA Stage:
    • The PPA and PA gain values are fixed at 6 and 18, respectively.
    • No changes need to be made to the PPA and PA gain values.