AK5365 Datasheet, PDF (19/41 Pages) Asahi Kasei Microsystems – 24-BIT 96KHZ ADC WITH SELETOR/PGA/ALCl

ASAHI KASEI
[AK5365]
[Input selector switching sequence]
The input selector should be changed after soft mute to avoid the switching noise of the input selector (Figure 6).
1. Enable the soft mute before changing channel.
2. Change channel.
3. Disable the soft mute.
SMUTE
DATT Level
(1)
Attenuation
-∞
(1)
(2)
Channel
LIN1/RIN1
LIN2/RIN2
Figure 6. Input channel switching sequence example
The period of (1) varies in the setting value of DATT. It takes 1024/fs to mute when DATT value is 0dB.
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.
„ Function of CTRL Pin
The CTRL pin sets the audio interface format and the type of serial control interface. When the CTRL pin is “L”, the audio
interface format is selected by the DIF bit and the serial control interface is 3-wire control mode. When the CTRL pin is
“H”, the audio interface format is fixed to 24bit I²S compatible and the serial control interface is I²C-bus control mode.
CTRL pin
L
H
Audio Interface Format Serial Control Interface
Note
24bit, I²S Compatible
3-wire Control
I²C-Bus Control
Table 8. CTRL pin Function
Note: The audio interface format is ORed between the CTRL pin and DIF bit. When the CTRL pin is “L”, the audio
interface format can be selected between 24bit MSB justified and 24bit I²S compatible by DIF bit. When the CTRL
pin is “H”, the audio interface format is fixed to 24bit I²S compatible.
MS0164-E-01
- 19 -
2002/08