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參數(shù)資料
| 型號(hào)： | WM8725 |
| 廠(chǎng)商： | Wolfson Microelectronics |
| 英文描述： | 99dB Stereo DAC |
| 中文描述： | 九九分貝立體聲DAC |
| 文件頁(yè)數(shù)： | 8/9頁(yè) |
| 文件大?。?/td> | 348K |
| 代理商： | WM8725 |
WM8725
Production Data
WOLFSON MICROELECTRONICS LTD
PD Rev 2.0 July 2000
8
RECOMMENDED EXTERNAL COMPONENTS
GND
VOUTR
CAP
VDD
NC
BCKIN
LRCIN
DIN
5
6
7
1
2
3
4
10
9
8
14
13
12
11
VOUTL
MUTE
NC
DEEMPH
SCKI
FORMAT
WM8725
GND
VDD
ANALOGUE
OUTPUT
FOR RIGHT
CHANNEL
FROM AUDIO
PROCESSOR
ANALOGUE
OUTPUT FOR
LEFT
CHANNEL
256fs/384fs CLK
10
μF
0.1μF
10μF
+
External
LPF
External
LPF
Figure 5 Recommended External Components
DETAIL OF RECOMMENDED EXTERNAL COMPONENTS SHOWING THE EXTERNAL
LOW PASS FILTER
External LPF
x2 for Stereo Operation
100pF
-
+
10k
1500pF
10k
680pF
10k
Filtered
Analogue
Output
VOUTR
VOUTL
Figure 6 Third-Order Low Pass Filter (LPF) Example
An external low pass filter is recommended (see Figure 6) if the device is driving a wideband
amplifier. In some applications, second-order or passive RC filter may be adequate.
PCB LAYOUT
1.
Place all supply decoupling capacitors as close as possible to their respective supply
pins and provide a low impedance path from the capacitors to the appropriate ground.
2.
Separate analogue and digital ground planes should be situated under respective
analogue and digital device pins.
3.
Avoid noise on the CAP reference pin. The decoupling capacitor should be placed as
close to this pin as possible with a low impedance path from the capacitor to analogue
ground.
4.
Digital input signals should be screened from each other and from other sources of
noise to avoid cross-talk and interference. They should also run over the digital ground
plane to avoid introducing unwanted noise into the analogue ground plane.
5.
Analogue output signal tracks should be kept as short as possible and over the
analogue ground plane reducing the possibility of losing signal quality.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| WM8725_04 | 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:99dB Stereo DAC |
| WM8725_12 | 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:99dB Stereo DAC |
| WM8725CGED | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Stereo DAC RoHS:否 制造商:Wolfson Microelectronics 轉(zhuǎn)換器數(shù)量: 分辨率: 接口類(lèi)型: 轉(zhuǎn)換速率: 信噪比: 工作電源電壓: DAC 輸出端數(shù)量: 工作溫度范圍: 電源電流: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| WM8725CGED/R | 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:99dB Stereo DAC |
| WM8725ED | 制造商:WOLFSON 制造商全稱(chēng):WOLFSON 功能描述:99dB Stereo DAC |
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