WM8951L_07 WOLFSON [Wolfson Microelectronics plc], WM8951L_07 Datasheet - Page 39

• Manufacturer Part Number: WM8951L_07
• Description: Stereo ADC with Microphone Input and Clock Generator
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Production Data
Figure 31 ADC Digital Filter Frequency Response –Type 3
ADC HIGH PASS FILTER
w
-100
-20
-40
-60
-80
0
0
0.5
1
Frequency (Fs)
The WM8951L has a selectable digital high pass filter to remove DC offsets. The filter response is
characterised by the following polynomial.
H(z) =
1.5
1 – 0.9995 z
2
1 – z
-1
2.5
-1
3
Figure 32 ADC Digital Filter Ripple –Type 3
-0.01
-0.02
-0.03
-0.04
-0.05
-0.06
0.02
0.01
0
0
0.05
0.1
Frequency (Fs)
PD Rev 4.1 December 2007
0.15
0.2
WM8951
0.25
39