The DDC gain boost (see the DDC configuration register) provides additional gain through the DDC block. Setting BOOST to 1 sets the total decimation filter chain gain to 6.02 dB. With a setting of 0, the total decimation filter chain has a 0-dB gain. Only use this setting when the negative image of the input signal is filtered out by the decimation filters, otherwise clipping may occur. There is no reduction in analog performance when gain boost is enabled or disabled, but care must be taken to understand the reference output power for proper performance calculations.