AK4356 Datasheet, PDF (16/29 Pages) Asahi Kasei Microsystems – 192kHz 24 Bit IX-CHANNEL DAC FOR DVD-AUDIO

ASAHI KASEI
[AK4356]
LRCK
BICK
(32fs)
SDTI
01
23
8 23 22
11 12 13 14 15 0 1
2
3
13 12 11 10 9 8 23 22
11 12 13 14 15 0 1
13 12 11 10 9 8 23
BICK
(64fs)
SDTI
0123
23 24 25
31 0 1 2 3
23 24 25
31 0 1
23 22
1 0 Don’t care
23 22
1 0 Don’t care
23
23:MSB, 0:LSB
Lch Data
Rch Data
Figure 4. Mode 3 Timing
n Output Volume
The AK4356 includes channel independent digital output volumes (ATT) with 256 levels at 0.5dB steps including MUTE.
These volumes are in front of the DAC and can attenuate the input data from 0dB to –127dB and mute. When changing
levels, transitions are executed via soft changes; thus no switching noise occurs during these transitions.
n De-emphasis filter
A digital de-emphasis filter is available for 32, 44.1 or 48kHz sampling rates (tc=50/15ms). It can be set for DAC1
(SDTI1), DAC2 (SDTI2) and DAC3 (SDTI3) independently. It is enabled or disabled with the control register data of
DEM1-0 and DFS1-0. The de-emphasis filter is disabled at double or 4 times sampling mode (except for DFS0 = DFS1 =
“0”).
DEM1 DEM0 De-emphasis
0
0
44.1kHz
0
1
OFF
default
1
0
48kHz
1
1
32kHz
Table 4. De-emphasis filter control with DEM1-0 (DFS1-0 = “00”)
DFS1 DFS0 De-emphasis
0
0
See Table 4. default
0
1
OFF
1
0
OFF
1
1
OFF
Table 5. De-emphasis filter control with DFS1-0
M0072-E-01
- 16 -
1999/09