參數(shù)資料
型號： PCM1755DBQR
英文描述： 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
中文描述： 24位192千赫采樣增強(qiáng)的多級Δ-Σ，音頻數(shù)字模擬轉(zhuǎn)換器
文件頁數(shù)： 20/33頁
文件大?。?/td> 309K
代理商： PCM1755DBQR
PCM1753
PCM1754
PCM1755
SLES092A – OCTOBER 2003 – REVISED AUGUST 2004
www.ti.com
20
Register Definitions
B15
0
B14
IDX6
B13
IDX5
B12
IDX4
B11
IDX3
B10
IDX2
B9
IDX1
B8
IDX0
B7
AT17
B6
AT16
B5
AT15
B4
AT14
B3
AT13
B2
AT12
B1
AT11
B0
AT10
Register 16
B15
0
B14
IDX6
B13
IDX5
B12
IDX4
B11
IDX3
B10
IDX2
B9
IDX1
B8
IDX0
B7
AT27
B6
AT26
B5
AT25
B4
AT24
B3
AT23
B2
AT22
B1
AT21
B0
AT20
Register 17
ATx[7:0]: Digital Attenuation Level Setting
Where x = 1 or 2, corresponding to the DAC output V
OUT
L (x = 1) and V
OUT
R (x = 2).
Default value: 1111 1111b
Each DAC channel (V
OUT
L and V
OUT
R) includes a digital attenuation function. The attenuation level can be
set from 0 dB to –63 dB in 0.5-dB steps. Changes in attenuator levels are made by incrementing or
decrementing one step (0.5 dB) for every 8/f
S
time internal until the programmed attenuator setting is reached.
Alternatively, the attenuation level can be set to infinite attenuation (or mute).
The attenuation data for each channel can be set individually. The attenuation level is set using the following
formula:
Attenuation level (dB) = 0.5
×
(ATx[7:0]
DEC
– 255)
where ATx[7:0]
DEC
= 0 through 255.
For ATx[7:0]
DEC
= 0 through 128, attenuation is set to infinite attenuation.
The following table shows the attenuation levels for various settings:
ATx[7:0]
1111 1111b
DECIMAL VALUE
255
ATTENUATION LEVEL SETTING
0 dB, No Attenuation. (default)
1111 1110b
254
–0.5 dB
1111 1101b
253
–1.0 dB
1000 0011b
131
–62.0 dB
1000 0010b
130
–62.5 dB
1000 0001b
129
–63.0 dB
1000 0000b
128
Mute
0000 0000
B
0
Mute
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 18
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
SRST
OVER
RSV
RSV
RSV
RSV
MUT2
MUT1
MUTx: Soft Mute Control
where x = 1 or 2, corresponding to the DAC outputs V
OUT
L (x = 1) and V
OUT
R (x = 2).
Default value: 0
MUTx = 0
MUTx = 1
Mute disabled (default)
Mute enabled
The mute bits, MUT1 and MUT2, are used to enable or disable the soft mute function for the corresponding
DAC outputs, V
OUT
L and V
OUT
R. 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) for every 8/f
S
seconds. This provides pop-free muting of the DAC output.
相關(guān)PDF資料
PDF描述
PCM1753 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
PCM1753DBQ 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
PCM1754 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
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PCM1755DBQ 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
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