n Digital Attenuator
AK4527B has channel-independent digital attenuator (256 levels, 0.5dB step). Attenuation level of each channel can be
set by each ATT7-0 bits (table 10).
Table 10. Attenuation level of digital attenuator
The transition between set values is soft transition of 7425 levels. It takes 7424/fs (168ms@fs=44.1kHz) from 00H(0dB)
to FFH(MUTE). If PDN pin goes to “L”, the ATTs are initialized to 00H. The ATTs are 00H when RSTN = “0”. When
RSTN return to “1”, the ATTs fade to their current value. Digital attenuator is independent of soft mute function.
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