WM8951L Wolfson Microelectronics plc, WM8951L Datasheet - Page 37

• Manufacturer Part Number: WM8951L
• Description: Stereo ADC with Microphone Input and Clock Generator
• Manufacturer: Wolfson Microelectronics plc

Production Data
DIGITAL FILTER CHARACTERISTICS
Table 25 Digital Filter Characteristics
TERMINOLOGY
1.
2.
w
ADC Filter Type 0 (USB Mode, 250fs operation)
Passband
Passband Ripple
Stopband
Stopband Attenuation
ADC Filter Type 1 (USB mode, 272fs or Normal mode operation)
Passband
Passband Ripple
Stopband
Stopband Attenuation
High Pass Filter Corner
Frequency
Stop Band Attenuation (dB) - the degree to which the frequency spectrum is attenuated (outside audio band)
Pass-band Ripple – any variation of the frequency response in the pass-band region
PARAMETER
The ADC employs 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.
TEST CONDITIONS
f > 0.5465fs
f > 0.584fs
+/- 0.05dB
+/- 0.05dB
-0.5dB
-0.1dB
-6dB
-6dB
-3dB
0.5465fs
0.584fs
MIN
-60
-60
0
0
0.5fs
0.5fs
10.4
21.6
TYP
3.7
0.4535fs
+/- 0.05
+/- 0.05
0.416fs
MAX
PD Rev 4.1 December 2007
www.DataSheet4U.com
UNIT
dB
dB
dB
dB
Hz
WM8951
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