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WM8778SEDS/R bảng dữ liệu(PDF) 48 Page - Wolfson Microelectronics plc

tên linh kiện WM8778SEDS/R
Giải thích chi tiết về linh kiện  24 BIT 192KHZ STEREO CODEC
PDF  50 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
Trang chủ  http://www.wolfsonmicro.com
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WM8778SEDS/R bảng dữ liệu(HTML) 48 Page - Wolfson Microelectronics plc

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WM8778
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PP Rev 1.7 June 2004
48
APPLICATIONS INFORMATION
RECOMMENDED EXTERNAL COMPONENTS
It is recommended that a low pass filter be applied to the output from the DAC for hi-fi applications.
Typically a second order filter is suitable and provides sufficient attenuation of high frequency
components (the unique low order, high bit count multi-bit sigma delta DAC structure used in
WM8778 produces much less high frequency output noise). This filter is typically also used to
provide the 2x gain needed to provide the standard 2Vrms output level from most consumer
equipment. Figure 34 shows a suitable post DAC filter circuit, with 2x gain. Alternative inverting filter
architectures might also be used with as good results.
+
_
+
+VS
-VS
10uF
51
Ω
7.5K
Ω
680pF
1.8k
Ω
10k
Ω
4.7k
Ω
4.7k
Ω
1.0nF
Figure 38 Recommended Post DAC Filter Circuit



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