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WM8772 датащи(PDF) 40 Page - Wolfson Microelectronics plc

номер детали WM8772
подробное описание детали  24-bit, 192kHz 6-Channel Codec with Volume Control
PDF  73 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8772 датащи(HTML) 40 Page - Wolfson Microelectronics plc

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WM8772EDS – 28 LEAD SSOP
Production Data
w
PD Rev 4.2 October 2005
40
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 WM8772EDS 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 35 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 35 Recommended Post DAC Filter Circuit



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