參數(shù)資料
型號(hào): PCM1727
英文描述: Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE DUAL PLL TM
中文描述: 立體聲音頻數(shù)字模擬轉(zhuǎn)換器,具有可編程雙鎖相環(huán)商標(biāo)
文件頁(yè)數(shù): 14/15頁(yè)
文件大?。?/td> 220K
代理商: PCM1727
14
PCM1727
BYPASSING POWER SUPPLIES
The power supplies should be bypassed as close as
possible to the unit. Refer to Figure 18 for optimal values of
bypass capacitors. Its is also recommended to include a
0.1
μ
F ceramic capacitor in parallel with the 10
μ
F tantalum
capacitor.
THEORY OF OPERATION
The delta-sigma section of PCM1727 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 16. 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. The theoretical quantization noise per-
formance of the 5-level delta-sigma modulator is shown in
Figure 17.
FIGURE 17. Quantization Noise Spectrum.
FIGURE 16. 5-Level
Σ
Modulator Block Diagram.
3rd ORDER
Σ
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
)
In
8f
18-Bit
+
+
+
4
3
2
1
0
5-level Quantizer
+
+
Z
–1
+
+
Z
–1
+
+
Z
–1
AC-3 APPLICATION CIRCUIT
A typical application for PCM1727 is AC-3 5.1 channel
audio decoding and playback. This circuit uses PCM1727 to
develop the audio system clock from the 27MHz video
clock, with the SCKO2 pin used to drive the AC-3 decoder
and two PCM1720 units, the non-PLL version of PCM1723
and PCM1727.
相關(guān)PDF資料
PDF描述
PCM1728 24-Bit, 96kHz Sampling CMOS Delta-Sigma Stereo Audio DIGITAL-TO-ANALOG CONVERTER
PCM1732 24-Bit, 96kHz, Stereo Audio DIGITAL-TO-ANALOG CONVERTER With HDCD Decoder
PCM1733 Stereo Audio DIGITAL-TO-ANALOG CONVERTER 18 Bits, 96kHz Sampling
PCM1738 24-Bit, 192kHz Sampling, Advanced Segment, Audio-Stereo DIGITAL-TO-ANALOG CONVERTER
PCM1738E2K 24-Bit, 192kHz Sampling, Advanced Segment, Audio-Stereo DIGITAL-TO-ANALOG CONVERTER
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM1727E 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC w/Prog Dual PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類(lèi)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
PCM1727E/2K 功能描述:數(shù)模轉(zhuǎn)換器- DAC Stereo DAC w/Prog Dual PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
PCM1727E/2KG4 功能描述:數(shù)模轉(zhuǎn)換器- DAC Stereo DAC w/Prog Dual PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
PCM1727E-2 功能描述:數(shù)模轉(zhuǎn)換器- DAC Stereo DAC w/Prog Dual PLL RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類(lèi)型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube
PCM1727E2K 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:DIGITAL-TO-ANALOG CONVERTER With Programmable Dual PLL