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參數(shù)資料
| 型號： | PCM1721 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Stereo Audio Digital-To-Analog Converter With Programmable PLL(帶可編程PLL立體聲音頻D\A轉(zhuǎn)換器) |
| 中文描述： | 立體聲音頻數(shù)字模擬轉(zhuǎn)換器（帶可編程鎖相環(huán)立體聲音頻?\\阿轉(zhuǎn)換器，具有可編程鎖相環(huán)） |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 227K |
| 代理商： | PCM1721 |
15
PCM1721
FIGURE 15. 5-Level
Σ
Modulator Block Diagram.
Out
48f
S
(384f
S
)
64f
S
(256f
S
)
In
8f
18-Bit
+
+
+
4
3
2
1
0
5-level Quantizer
+
–
+
Z
–1
+
–
+
Z
–1
+
+
Z
–1
THEORY OF OPERATION
The delta-sigma section of PCM1721 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 15. This 5-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 modu-
lator and the internal 8X interpolation filter is 48f
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 16.
FIGURE 16. Quantization Noise Spectrum.
3rd ORDER
Σ
MODULATOR
Frequency (kHz)
G
20
0
–20
–40
–60
–80
–100
–120
–140
–160
0
5
10
15
20
25
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| PCM1725U | Stereo Audio DIGITAL-TO-ANALOG CONVERTER 16 Bits, 96kHz Sampling |
| PCM1727 | Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE DUAL PLL TM |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCM1723 | 制造商:BB 制造商全稱:BB 功能描述:Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE PLL |
| PCM1723E | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL 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 |
| PCM1723E/2K | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL 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 |
| PCM1723E/2KG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Ster DAC w/Prog PLL 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 |
| PCM1723EG | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
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