wm8595 Wolfson Microelectronics plc, wm8595 Datasheet - Page 77

• Manufacturer Part Number: wm8595
• Description: 24-bit 192khz 2vrms Multi-channel Codec
• Manufacturer: Wolfson Microelectronics plc

Production Data
ADC FILTER RESPONSES
ADC HIGH PASS FILTER
The WM8595 has a selectable digital high pass filter to remove DC offsets. The filter response is characterised by the
following polynomial.
Figure 68 ADC Highpass Filter Response
w
MA GNITUDE(dB)
Figure 66 ADC Digital Filter Frequency Response
-100
-120
-140
-10
-12
-14
-16
-18
-20
-20
-40
-60
-80
-2
-4
-6
-8
0
20
0
0
0.00
2
4
0.25
6
Magnitude (dB) up to fs
8
H(z) =
10
Frequency
0.50
12
1 - 0.9995z
14
1 - z
16
0.75
-1
18
-1
20
Figure 67 ADC Digital Filter Ripple
-0.02
-0.04
-0.06
-0.08
0.08
0.06
0.04
0.02
-0.1
0.1
0
0.00
Magnitude (dB): Passband Ripple
Frequency
0.25
PD, Rev 4.1, April 2010
WM8595
77