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參數(shù)資料
| 型號： | AK4382VT |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 112dB 192kHz 24-BIT SCH DAC |
| 中文描述： | 一一二分貝192kHz的24位三星援 |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 251K |
| 代理商： | AK4382VT |
ASAHI KASEI
[AK4382]
MS0034-E-00
2000/7
- 12 -
LRCK
BICK
(64fs)
SDTI
0
3
1
2
24
31
0
1
31
0
1
23:MSB, 0:LSB
22
1
0
Don’t care
23
Lch Data
Rch Data
23
25
3
2
24
23
25
22
1
0
Don’t care
23
23
Figure 4. Mode 3 Timing
n
De-emphasis Filter
A digital de-emphasis filter is available for 32, 44.1 or 48kHz sampling rates (tc = 50/15μs) and is enabled or disabled with
DEM0 and DEM1. In case of double speed and quad speed mode, the digital de-emphasis filter is always off.
DEM1
DEM0
Mode
0
0
1
1
0
1
0
1
44.1kHz
OFF
48kHz
32kHz
Default
Table 8. De-emphasis Filter Control (Normal Speed Mode)
n
Output Volume
The AK4382 includes channel independent digital output volumes (ATT) with 256 levels at linear step including MUTE.
These volumes are in front of the DAC and can attenuate the input data from 0dB to –48dB and mute. When changing
levels, transitions are executed via soft changes; thus no switching noise occurs during these transitions. The transition time
of 1 level and all 256 levels is shown in Table 9.
Transition Time
1 Level
4LRCK
8LRCK
16LRCK
Sampling Speed
255 to 0
1020LRCK
2040LRCK
4080LRCK
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
Table 9. ATT Transition Time
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