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AK4529 Datasheet(PDF) 21 Page - Asahi Kasei Microsystems

Part No. AK4529
Description  High Performance Multi-channel Audio CODEC
Download  38 Pages
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Manufacturer  AKM [Asahi Kasei Microsystems]
Direct Link  http://www.akm.com
Logo AKM - Asahi Kasei Microsystems

AK4529 Datasheet(HTML) 21 Page - Asahi Kasei Microsystems

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ASAHI KASEI
[AK4529]
MS0082-E-00
2001/3
- 21 -
n Digital Attenuator
AK4529 has channel-independent digital attenuator (256 levels, 0.5dB step). Attenuation level of each channel can be set
by each ATT7-0 bits (table 11).
ATT7-0
Attenuation Level
00H
0dB
01H
-0.5dB
02H
-1.0dB
::
FDH
-126.5dB
FEH
-127.0dB
FFH
MUTE (-
∞)
Default
Table 11. Attenuation level of digital attenuator
Transition time between set values of ATT7-0 bits can be selected by ATS1-0 bits (table 12).
Mode
ATS1
ATS0
ATT speed
0
0
0
7424/fs
1
0
1
1024/fs
2
1
0
256/fs
Default
Table 12. Transition time between set values of ATT7-0 bits
The transition between set values is soft transition of 7425 levels in mode 0. It takes 7424/fs (168ms@fs=44.1kHz) from
00H(0dB) to FFH(MUTE) in mode 0. If PDN pin goes to “L”, the ATTs are initialized to 00H. The ATTs are 00H when
RSTN = “0”. When RSTN return to “1”, the ATTs fade to their current value. Digital attenuator is independent of soft
mute function.


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