參數(shù)資料
型號： DSD1608
英文描述： 8-CHANNEL, ENHANCED MULTIFORMAT, DELTA-SIGMA, DIGITAL-TO-ANALOG CONVERTER
中文描述： 8通道，增強多格式，Δ-Σ，數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù)： 22/41頁
文件大?。?/td> 293K
代理商： DSD1608
DSD1608
SLES040
–
JUNE 2002
www.ti.com
22
Register Definitions
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 0
R/W
0
0
0
0
0
0
0
AT17
AT16
AT15
AT14
AT13
AT12
AT11
AT10
:
Register 7
R/W
0
0
0
0
1
1
1
AT87
AT86
AT85
AT84
AT83
AT82
AT81
AT80
R/W
When R/W = 0, a write operation is performed. When R/W = 1, a read operation is performed.
ATxy
Digital Attenuation Level Setting
Where x = register number + 1 and y = 1 to 8, corresponding to the DAC output V
OUT
1 to V
OUT
8. In PCM mode, the
default value, 1111 1111b, represents 0 dB. Each DAC channel (V
OUT
1 to V
OUT
8) includes a digital attenuation
function. The attenuation level can be set from 0 dB to
–
119.5 dB in 0.5 dB steps or to
–
∞
in PCM mode, and from
6 dB to
–
113.5 dB or to
–
∞
in DSD mode. Alternatively, the attenuation level can be set to infinite attenuation (or mute).
The following table shows attenuation levels for various settings.
Read/Write Mode Select
:PCM/DSD Mode
ATxy
DECIMAL VALUE
ATTENUATION LEVEL SETTING
PCM Mode
DSD Mode
1111 1111b
255
0 dB, no attenuation (default)
6 dB
1111 1110b
254
–
0.5 dB
5.5 dB
1111 1101b
253
–
1 dB
5 dB
:
:
:
:
1111 0011b
243
–
6 dB
0 dB
1111 0010b
242
–
6.5 dB
–
0.5 dB
:
:
:
:
1000 0011b
131
–
62 dB
–
56 dB
1000 0010b
130
–
62.5 dB
–
56.5 dB
1000 0001b
129
–
63 dB
–
57 dB
1000 0000b
128
–
63.5 dB
–
57.5 dB
:
:
:
:
0111 0101b
117
–
69 dB
–
63 dB
:
:
:
:
0001 0000b
16
–
119.5 dB
–
∞
:
–
∞
–
113.5 dB
–
∞
:
–
∞
0000 1111b
15
:
:
0000 0000b
0
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 8
R/W
0
0
0
1
0
0
0
MUT8
MUT7
MUT6
MUT5
MUT4
MUT3
MUT2
MUT1
R/W
When R/W = 0, a write operation is performed. When R/W = 1, a read operation is performed.
MUTx
Soft Mute Control
Where x = 1 to 8, corresponding to the DAC output V
OUT
1 to V
OUT
8. Default value: 0
Read/Write Mode Select
:PCM/DSD Mode
MUTx = 0
MUTx = 1
Mute disabled (default)
Mute enabled
The mute bits, MUT1 to MUT8, are used to enable or disable the soft mute function for the corresponding DAC
outputs, V
OUT
1 to V
OUT
8. The soft mute function is incorporated into the digital attenuators. When mute is disabled
(MUTx = 0), the attenuator and DAC operate normally. When mute is enabled by setting MUTx = 1, the digital
attenuator for the corresponding output is decreased from the current setting to infinite attenuation, one attenuator
step (0.5 dB) at a time. This provides pop-free muting of the DAC output. By setting MUTx = 0, the attenuator is
incremented one step at a time to the previously programmed attenuation level.
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