- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367827 > PCM1727 Stereo Audio DIGITAL-TO-ANALOG CONVERTER WITH PROGRAMMABLE DUAL PLL TM PDF資料下載
參數(shù)資料
| 型號： | 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 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 220K |
| 代理商： | PCM1727 |
12
PCM1727
APPLICATION
CONSIDERATIONS
DELAY TIME
There is a finite delay time in delta-sigma converters. In A/D
converters, this is commonly referred to as latency. For a
delta-sigma D/A converter, delay time is determined by the
order number of the FIR filter stage, and the chosen sampling
rate. The following equation expresses the delay time of
PCM1727:
T
D
= 11.125
x
1/f
S
For f
S
= 44.1kHz, T
D
= 11.125/44.1kHz = 251.4
μ
s
Applications using data from a disc or tape source, such as
CD audio, DVD audio, Video CD, DAT, Minidisc, etc.,
generally are not affected by delay time.
FIGURE 12. 3rd-Order LPF.
OUTPUT FILTERING
For testing purposes all dynamic tests are done on the
PCM1727 using a 20kHz low pass filter. This filter limits
the measured bandwidth for THD+N, etc. to 20kHz. Failure
to use such a filter will result in higher THD+N and lower
SNR and Dynamic Range readings than are found in the
specifications. The low pass filter removes out of band
noise. Although it is not audible, it may affect dynamic
specification numbers.
The performance of the internal low pass filter from DC to
24kHz is shown in Figure 10. The higher frequency rolloff
of the filter is shown in Figure 11. If the user’s application
has the PCM1727 driving a wideband amplifier, it is recom-
mended to use an external low pass filter. A simple 3rd-
order filter is shown in Figure 12. For some applications, a
passive RC filter or 2nd-order filter may be adequate.
10k
10k
680pF
10k
1500pF
100pF
+
V
SIN
–
90
0
–90
–180
–270
–360
100
1k
10k
100k
1M
GAIN vs FREQUENCY
Frequency (Hz)
P
6
–14
–34
–54
–74
–94
G
Gain
Phase
OPA604
FIGURE 11. Low Pass Filter Wideband Frequency Response.
FIGURE 10. Low Pass Filter Frequency Response.
10
5
0
–5
–10
–15
–20
–25
–30
–35
–40
–45
–50
–55
–60
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
d
INTERNAL ANALOG FILTER FREQUENCY RESPONSE
(10Hz~10MHz)
1.0
0.5
0
–0.5
–1.0
d
20
Frequency (Hz)
100
1k
10k
24k
INTERNAL ANALOG FILTER FREQUENCY RESPONSE
(20Hz~24kHz, Expanded Scale)
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 |
| 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 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格: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 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格: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 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時間:1 us 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| PCM1727E2K | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DIGITAL-TO-ANALOG CONVERTER With Programmable Dual PLL |
發(fā)布緊急采購，3分鐘左右您將得到回復。