ak4651 AKM Semiconductor, Inc., ak4651 Datasheet - Page 31

• Manufacturer Part Number: ak4651
• Description: 16bit ?? Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
The AK4651 has a channel-independent digital attenuator (128 levels, 0.5dB step, Mute). The attenuation level of each
channel can be set by the ATTL/R6-0 bits (Table 25). When the DATTC bit = “1”, the ATTL6-0 bits control both Lch and
Rch attenuation levels. When the DATTC bit = “0”, the ATTL6-0 bits control Lch level and ATTR6-0 bits control Rch
level.
The ATS bit sets the transition time between set values of ATTL/R6-0 bits as either 531/fs or 128/fs (Table 26). When
ATS bit = “0”, a soft transition between the set values occurs (531 levels). It takes 531/fs (11ms@fs=48kHz) from
00H(0dB) to 7FH(MUTE).
MS0503-E-00
Digital Attenuator
Table 26. Transition time between set values of ATTL/R6-0 bits
ATTL/R6-0
ATS
0
1
7DH
7EH
7FH
00H
01H
02H
:
Table 25. DATT Attenuation Table
0dB to MUTE
531/fs
128/fs
MUTE (−∞)
Attenuation
−62.5dB
−63.0dB
−0.5dB
−1.0dB
0dB
ATT speed
:
- 31 -
1 step
29/fs
4/fs
0.5dB
STEP
-
Default
Default
[AK4651]
2006/04