AK4683_07 Datasheet, PDF (41/84 Pages) Asahi Kasei Microsystems – Asynchronous Multi-Channel Audio CODEC with DIR/T

[AK4683]
[Input selector switching sequence]
The input selector should be changed after soft mute to avoid the switching noise of the input selector (Figure 22).
1. Enable the soft mute before changing channel.
2. Change channel.
3. Disable the soft mute.
SMUTE
DATT Level
(1)
A tte n u a tio n
-∞
(1)
(2)
Channel
L IN 1 /R IN 1
L IN 2 /R IN 2
Figure 22. Input channel switching sequence example
The period of (1) varies in the setting value of DATT. It takes 1028/fs to mute when DATT value is +24dB.
When changing channels, the input channel should be changed during (2). The period of (2) should be around 200ms
because there is some DC difference between the channels.
MS0427-E-02
- 41 -
2007/04