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參數(shù)資料
| 型號： | PCM1742KE |
| 英文描述： | AC 7C 7#12 SKT RECP |
| 中文描述： | 24位192kHz采樣加強(qiáng)多層次，Δ-Σ，音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 12/22頁 |
| 文件大小： | 322K |
| 代理商： | PCM1742KE |
PCM1742
SBAS176
12
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
ATx[7:0]
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
AT27
AT26
AT25
AT24
AT23
AT22
AT21
AT20
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 1111
B
Each DAC channel (V
OUT
L and V
OUT
R) includes a digital attenuator function. The attenuation level may be
set from 0dB to –63dB, in 0.5dB steps. Changes in attenuation levels are made by incrementing or
decrementing, by one step (0.5dB), for every 8/f
S
time interval until the programmed attenuator setting is
reached. Alternatively, the attenuation level may be set to infinite attenuation, or mute. The attenuation data
for each channel can be set individually.
The attenuation level may be set using the formula below.
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, the attenuator is set to infinite attenuation.
The following table shows attenuator levels for various settings.
ATx[7:0]
1111 1111
B
1111 1110
B
1111 1101
B
1000 0011
B
1000 0010
B
1000 0001
B
1000 0000
B
0000 0000
B
Decimal Value
255
254
253
131
130
129
128
0
Attenuator Level Setting
0dB, No Attenuation (default)
–0.5dB
–1.0dB
–62.0dB
–62.5dB
–63.0dB
Mute
Mute
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
Register 18
MUTx
0
IDX6
IDX5
IDX4
IDX3
IDX2
IDX1
IDX0
RSV
OVER
RSV
RSV
RSV
RSV
MUT2
MUT1
Soft Mute Control
Where x = 1 or 2, corresponding to the DAC output 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 will be decreased from the current setting to
the infinite attenuation setting one attenuator step (0.5dB) at a time. This provides a “pop”-free muting of the
DAC output.
OVER
Oversampling Rate Control
Default Value: 0
OVER = 0
OVER = 1
64x Oversampling (default)
128x Oversampling
The OVER bit is used to control the oversampling rate of the delta-sigma DACs. The OVER = 1 setting is
recommended when the oversampling rate is 192kHz (system clock is 128 or 192f
S
).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1742KE/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHZ Samp Enh Delta-Sig DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1742KE/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHZ Samp Enh Delta-Sig DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1742KEG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHZ Samp Enh Delta-Sig DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1744 | 制造商:BB 制造商全稱:BB 功能描述:24 Bits, 96kHz, Sampling Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| PCM1744U | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24 Bit 96kHz Smplg Stereo DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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