SLAS831D March 2014 – March 2018 PCM1860 , PCM1861 , PCM1862 , PCM1863 , PCM1864 , PCM1865
PRODUCTION DATA.
The PCM186x has fade-in and fade-out functions on DOUT to avoid pop noise. This function is engaged on device power up or down, and mute or unmute. The level changes from 0 dB to mute, or mute to 0 dB, are performed using pseudo S-shaped characteristics calculation with zero-cross detection. Because of the zero-cross detection, the time needed for the fade-in and fade-out depends upon the analog input frequency (fIN). Fade takes 48 / fIN until processing is completed. If there is no zero cross during 8192 / fS, DOUT is faded in or out by force during 48 /fS (TIME OUT). Figure 43 illustrates the fade-in and fade-out operation processing.