參數(shù)資料
型號: DSD1702E
英文描述: ENHANCED MULTIFORMAT, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
中文描述: 增強的多格式,Δ-Σ,音頻數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù): 14/28頁
文件大?。?/td> 417K
代理商: DSD1702E
DSD1702
SLES005A
JUNE 2001
REVISED FEBRUARY 2002
14
www.ti.com
mode control registers (continued)
register definitions
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 16
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
AT17
AT16
AT15
AT14
AT13
AT12
AT11
AT10
Register 17
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
AT27
AT26
AT25
AT24
AT23
AT22
AT21
AT20
ATx[7:0] Digital Attenuation Level Setting
:PCM/DSD Mode
Where x = 1 or 2, corresponding to the DAC output V
OUT
L (x = 1) and V
OUT
R (x = 2).
In PCM mode, default value : 1111 1111
B
, 0 dB.
Each DAC channel (V
OUT
L and V
OUT
R) includes a digital attenuation function. The attenuation level may be
set from 0 dB to
119.5 dB and
infinity in 0.5 dB steps in PCM mode and 6 dB to
113.5 dB and
infinity in DSD
mode. Alternatively, the attenuation level may be set to infinite attenuation (or mute). A 6dB gain difference is
applied between PCM mode and DSD mode to compensate for the 0.5 maximum modulation index of DSD
signals.
The following table shows attenuation levels for various settings:
ATx[7:0]
DECIMAL VALUE
ATTENUATION LEVEL SETTING
PCM Mode
DSD Mode
1111 1111
B
1111 1110
B
1111 1101
B
:
255
0 dB, No Attenuation. (default)
6 dB
254
0.5 dB
5.5 dB
253
1 dB
5 dB
:
:
:
1111 0011
B
1111 0010
B
:
243
6 dB
0 dB
242
6.5 dB
0.5 dB
:
:
:
1000 0011
B
1000 0010
B
1000 0001
B
1000 0000
B
:
131
62 dB
56 dB
130
62.5 dB
56.5 dB
129
63 dB
57 dB
128
63.5 dB
57.5 dB
:
:
:
0111 0101
B
:
117
69 dB
63 dB
:
:
:
0001 0000
B
0000 1111
B
:
16
119.5 dB
113.5 dB
15
infinity
infinity
:
:
:
0000 0000
B
0
infinity
infinity
IDX[6:0]
Register Index
Register 16: 10000
B
Register 17: 10001
B
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