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WM8731SEDS/R データシート(PDF) 53 Page - Wolfson Microelectronics plc

部品番号 WM8731SEDS/R
部品情報  Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
PDF  63 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731SEDS/R データシート(HTML) 53 Page - Wolfson Microelectronics plc

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WM8731 / WM8731L
Production Data
w
PD Rev 4.3 August 2006
53
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
0001001
Active Control
0
ACTIVE
0
Activate Interface
1 = Active
0 = Inactive
0001111
Reset Register
8:0
RESET
not reset
Reset Register
Writing 00000000 to register resets
device
Table 30 Register Map Description
DIGITAL FILTER CHARACTERISTICS
The ADC and DAC employ different digital filters. There are 4 types of digital filter, called Type 0, 1, 2
and 3. The performance of Types 0 and 1 is listed in the table below, the responses of all filters is
shown in the proceeding pages.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ADC Filter Type 0 (USB Mode, 250fs operation)
+/- 0.05dB
0
0.416fs
Passband
-6dB
0.5fs
Passband Ripple
+/- 0.05
dB
Stopband
0.584fs
Stopband Attenuation
f > 0.584fs
-60
dB
ADC Filter Type 1 (USB mode, 272fs or Normal mode operation)
+/- 0.05dB
0
0.4535fs
Passband
-6dB
0.5fs
Passband Ripple
+/- 0.05
dB
Stopband
0.5465fs
Stopband Attenuation
f > 0.5465fs
-60
dB
-3dB
3.7
-0.5dB
10.4
High Pass Filter Corner
Frequency
-0.1dB
21.6
Hz
DAC Filter Type 0 (USB mode, 250fs operation)
+/- 0.03dB
0
0.416fs
Passband
-6dB
0.5fs
Passband Ripple
+/-0.03
dB
Stopband
0.584fs
Stopband Attenuation
f > 0.584fs
-50
dB
DAC Filter Type 1 (USB mode, 272fs or Normal mode operation)
+/- 0.03dB
0
0.4535fs
Passband
-6dB
0.5fs
Passband Ripple
+/- 0.03
dB
Stopband
0.5465fs
Stopband Attenuation
f > 0.5465fs
-50
dB
Table 31 Digital Filter Characteristics



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