ak4682 AKM Semiconductor, Inc., ak4682 Datasheet - Page 22

• Manufacturer Part Number: ak4682
• Description: Multi-channel Codec With 2vrms Stereo Selector
• Manufacturer: AKM Semiconductor, Inc.

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The AK4682 has channel-independent digital volume control (256 levels, 0.5dB step). The IATL7-0, IATR7-0 bits set
the volume level of each ADC channel (Table 16). The OAT1L7-0, OAT1R7-0, OAT2L7-0 and OAT2R7-0 bits set
each DAC channel (Table 17).
ATSAD (ATSDA) bits (Table 18, Table 19) control the transition time of attenuation. The transition between each
attenuation level is the soft transition. Therefore, the switching noise does not occur in the transition.
MS0610-E-01
Digital Volume Control
Mode
Mode
Table 18. Transition time of attenuation (ADC)
Table 19. Transition time of attenuation (DAC)
OAT1L7-0,
OAT1R7-0,
OAT2L7-0,
OAT2R7-0
IATL7-0,
0
1
0
1
IATR7-0
Table 17.DAC Digital Volume (OATT)
FEH
FEH
2FH
FFH
Table 16.ADC Digital Volume (IATT)
FFH
00H
01H
02H
30H
31H
00H
01H
02H
17H
18H
19H
:
:
ATSAD
ATSDA
0
1
0
1
Attenuation Level
Attenuation Level
MUTE (-∞)
MUTE (-∞)
- 22 -
+23.5dB
+22.0dB
+11.5dB
+11.0dB
+0.5dB
-103dB
+0.5dB
-115dB
+24dB
-0.5dB
+12dB
-0.5dB
0dB
0dB
ATT speed
ATT speed
:
:
:
:
1061/fs
1061/fs
256/fs
256/fs
(default)
(default)
(default)
(default)
[AK4682]
2007/07