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WM8772SEDS/V 数据表(PDF) 70 Page - Wolfson Microelectronics plc

部件名 WM8772SEDS/V
功能描述  24-bit, 192kHz 6-Channel Codec with Volume Control
PDF  73 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8772SEDS/V 数据表(HTML) 70 Page - Wolfson Microelectronics plc

Back Button WM8772SEDS/V Datasheet HTML 65Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 66Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 67Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 68Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 69Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 70Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 71Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 72Page - Wolfson Microelectronics plc WM8772SEDS/V Datasheet HTML 73Page - Wolfson Microelectronics plc  
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WM8772EFT – 32 LEAD TQFP
Production Data
w
PD Rev 4.2 October 2005
70
SUGGESTED ANALOGUE LOW PASS POST DAC FILTERS
It is recommended that a lowpass filter be applied to the output from each DAC channel 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 WM8772EFT produces much less high frequency output noise than
normal sigma delta DACs. This filter is typically also used to provide the 2x gain needed to provide the standard 2Vrms
output level from most consumer equipment.
Figure 59 shows a suitable post DAC filter circuit, with 2x gain. Alternative inverting filter architectures might also be used
with as good results.
7.5k
Ω
Ω
Ω
Ω
1.8k
Ω
Ω
Ω
Ω
10uF
1.0nF
10k
Ω
Ω
Ω
Ω
4.7k
Ω
Ω
Ω
Ω
680pF
4.7k
Ω
Ω
Ω
Ω
51
Ω
Ω
Ω
Ω
OP_FIL
VOUT1L
OP_FIL
VOUT1R
OP_FIL
VOUT2R
OP_FIL
VOUT2L
OP_FIL
VOUT3L
OP_FIL
VOUT3R
Figure 59 Recommended Post DAC Filter Circuit



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