AK4685 AKM [Asahi Kasei Microsystems], AK4685 Datasheet - Page 24

• Manufacturer Part Number: AK4685
• Description: Multi-channel CODEC with Differential Analog I/O
• Manufacturer: AKM [Asahi Kasei Microsystems]

■
The AK4685 has channel-independent digital volume control (256 levels, 0.5dB step). The IATL7-0, IATR7-0 bits set
the volume level of ADC channel
channel
ATSAD (ATSDA) bits
attenuation level is the soft transition. Therefore, the switching noise does not occur in the transition.
MS1106-E-00
Digital Volume Control
(Table
14).
(Table
15,
(Table
Table 16. Transition time of attenuation (DAC1/2)
Mode
Mode
Table
Table 15. Transition time of attenuation (ADC)
OAT1R7-0,
OAT1L7-0,
OAT2L7-0,
OAT2R7-0
IATL7-0,
0
1
0
1
IATR7-0
Table 14. DAC Digital Volume (OATT)
Table 13. ADC Digital Volume (IATT)
FEH
FEH
13). The OAT1L7-0, OAT1R7-0, OAT2L7-0 and OAT2R7-0 bits set each DAC
2FH
FFH
FFH
00H
01H
02H
30H
31H
00H
01H
02H
17H
18H
19H
:
:
16) control the transition time of attenuation. The transition between each
ATSAD
ATSDA
0
1
0
1
MUTE (-∞)
MUTE (-∞)
- 24 -
+23.5dB
+23.0dB
+11.5dB
+11.0dB
+0.5dB
-103dB
+0.5dB
-115dB
+24dB
-0.5dB
+12dB
-0.5dB
Gain
Gain
0dB
0dB
ATT speed
ATT speed
:
:
:
:
1061/fs
1061/fs
256/fs
256/fs
(default)
(default)
(default)
(default)
[AK4685]
2009/08