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參數(shù)資料
| 型號： | PCM1744 |
| 英文描述： | 24 Bits, 96kHz, Sampling Stereo Audio DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 24位，96kHz的，采樣的立體聲音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 9/9頁 |
| 文件大?。?/td> | 83K |
| 代理商： | PCM1744 |
9
PCM1744
FIGURE 9. 5-Level
Σ
Modulator Block Diagram.
FIGURE 10. Quantization Noise Spectrum.
THEORY OF OPERATION
The delta-sigma section of PCM1744 is based on a 5-level
amplitude quantizer and a 3rd-order noise shaper. This
section converts the oversampled input data to 5-level delta-
sigma format. A block diagram of the 5-level delta-sigma
modulator is shown in Figure 9. This 5-level delta-sigma
modulator has the advantage of stability and clock jitter over
the typical one-bit (2-level) delta-sigma modulator.
The combined oversampling rate of the delta-sigma modu-
lator and the internal 8x interpolation filter is 96f
S
for a
384f
S
system clock, and 64f
S
for a 256f
S
system clock. The
theoretical quantization noise performance of the 5-level
delta-sigma modulator is shown in Figure 10.
5-LEVEL
DELTA SIGMA MODULATOR
Frequency (kHz)
G
20
0
–20
–40
–60
–80
–100
–120
–140
–160
0
5
10
15
20
25
Out
48f
S
(384f
S
)
64f
S
(256f
S
)
In
8f
24-Bit
+
+
+
4
3
2
1
0
5-level Quantizer
+
–
+
Z
–1
+
–
+
Z
–1
+
+
Z
–1
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| PCM1748 | 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1744U | 制造商:Texas Instruments 功能描述:24BIT DAC CMOS LOW COST SMD 1744 |
| PCM1744U/2K | 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1744U/2KG4 | 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1744UG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 96kHz Sampling Stereo Audio 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 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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