參數(shù)資料
型號： PCM1748E
英文描述： 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
中文描述： 24位，96kHz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)： 18/22頁
文件大?。?/td> 323K
代理商： PCM1748E
PCM1748
SBAS165
18
THEORY OF OPERATION
The delta-sigma section of the PCM1748 is based on an
8-level amplitude quantizer and a fourth-order noise shaper. This
section converts the oversampled input data to 8-level delta-sigma
format. A block diagram of the 8-level delta-sigma modulator is
shown in Figure 14. This 8-level delta-sigma modulator has the
advantage of stability and clock jitter sensitivity over the typical
one-bit (2-level) delta-sigma modulator. The combined
oversampling rate of the delta-sigma modulator and the interpo-
lation filter is 64f
S
.
The theoretical quantization noise performance of the
8-level delta-sigma modulator is shown in Figure 15. The en-
hanced multilevel delta-sigma architecture also has advantages
for input clock jitter sensitivity due to the multilevel quantizer,
with the simulated jitter sensitivity, as shown in Figure 16.
FIGURE 14. Eight-Level Delta-Sigma Modulator.
FIGURE 15. Quantization Noise Spectrum.
+
Z
–
1
8-Level Quantizer
+
Z
–
1
+
Z
–
1
–
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Z
–
1
+
+
8f
S
64f
S
0
1
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5
6
7
8
0
–
20
–
40
–
60
–
80
–
100
–
120
–
140
–
160
–
180
Frequency (f
S
)
QUANTIZATION NOISE SPECTRUM
(64x Oversampling)
QUANTIZATION NOISE SPECTRUM
(128x Oversampling)
0
1
2
3
4
5
6
7
8
0
–
20
–
40
–
60
–
80
–
100
–
120
–
140
–
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–
180
Frequency (f
S
)
相關(guān)PDF資料
PDF描述
PCM1748KE 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER
PCM1750 Dual CMOS 18-Bit Monolithic Audio ANALOG-TO-DIGITAL CONVERTER
PCM1750P Dual CMOS 18-Bit Monolithic Audio ANALOG-TO-DIGITAL CONVERTER
PCM1750U Dual CMOS 18-Bit Monolithic Audio ANALOG-TO-DIGITAL CONVERTER
PCM1753DBQR 24-BIT, 192 kHz SAMPLING ENHANCED MULTI-LEVEL, DELTA-SIGMA, AUDIO DIGITAL-TO-ANALOG CONVERTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1748E/2K 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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
PCM1748E/2KG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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
PCM1748EG4 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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
PCM1748KE 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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
PCM1748KE/2K 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24Bit/192kHz Smplg 6Ch Enh Mltl D-S 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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