where x = 1 or 2, corresponding to the DAC outputs VOUTL (x = 1) and VOUTR (x = 2).
Default value: 0
The mute bits, MUT1 and MUT2, are used to enable or disable the soft mute function for the corresponding DAC outputs, VOUTL and VOUTR. The soft mute function is incorporated into the digital attenuators. When mute is disabled (MUTx = 0), the attenuator and DAC operate normally. When mute is enabled by setting MUTx = 1, the digital attenuator for the corresponding output is decreased from the current setting to infinite attenuation, one attenuator step (0.5 dB) for every 8/fS seconds. This provides pop-free muting of the DAC output.
By setting MUTx = 0, the attenuator is increased one step for every 8/fS seconds to the previously programmed attenuation level.