參數(shù)資料
型號: WM8773
廠商: Wolfson Microelectronics
元件分類: ADC
英文描述: 24-bit, 96kHz ADC with 8 Channel I/P Multiplexer
中文描述: 24位,96kHz的ADC,具有8通道I /頁復(fù)用器
文件頁數(shù): 25/30頁
文件大?。?/td> 270K
代理商: WM8773
Product Preview
WM8773
PP Rev 1.0 June 2002
25
DIGITAL FILTER CHARACTERISTICS
PARAMETER
ADC Filter
Passband
TEST CONDITIONS
MIN
TYP
MAX
UNIT
±
0.01 dB
-6dB
f > 0.5465fs
0
0.4535fs
±
0.01
0.5fs
22
Passband ripple
Stopband
Stopband Attenuation
Group Delay
dB
dB
fs
0.5465fs
-65
Table 11 Digital Filter Characteristics
ADC FILTER RESPONSES
-80
-60
-40
-20
0
0
0.5
1
2
2.5
3
R
Frequ1.5
Figure 15 ADC Digital Filter Frequency Response
-0.02
-0.015
-0.01
-0.005
0
0.005
0.01
0.015
0.02
0
0.05
0.1
0.15
0.2
Freq0.25
0.3
0.35
0.4
0.45
0.5
R
Figure 16 ADC Digital Filter Ripple
ADC HIGH PASS FILTER
The WM8773 has a selectable digital highpass filter to remove DC offsets. The filter response is characterised by the
following polynomial.
Figure 17 ADC Highpass Filter Response
1 - z
-1
1 - 0.9995z
-1
H(z) =
-15
-10
-5
0
0
0.0005
0.0015
0.002
R
Freq0.001
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