ak4382a AKM Semiconductor, Inc., ak4382a Datasheet - Page 12

• Manufacturer Part Number: ak4382a
• Description: 112db 192khz 24-bit 2ch Ds Dac
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
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.
n Output Volume
The AK4382A 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.
MS0071-E-02
BICK
(64fs)
SDTI
LRCK
0
1
23
23:MSB, 0:LSB
Sampling Speed
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
2
22
Table 8. De-emphasis Filter Control (Normal Speed Mode)
3
23
Lch Data
1
24
DEM1
Table 9. ATT Transition Time
0
0
0
1
1
Figure 4. Mode 3 Timing
25
Don’t care
DEM0
16LRCK
1 Level
4LRCK
8LRCK
31
0
1
0
1
- 12 -
0
Transition Time
44.1kHz
Mode
48kHz
32kHz
1
OFF
23
2
22
3
Default
1020LRCK
2040LRCK
4080LRCK
255 to 0
23
Rch Data
1
24
0
25
Don’t care
31
0
[AK4382A]
2002/12
1
23