wm8400 Wolfson Microelectronics plc, wm8400 Datasheet - Page 195

• Manufacturer Part Number: wm8400
• Description: Wolfson Audioplustm Hi-fi Audio Codec And Power Management Unit For Mobile Multimedia
• Manufacturer: Wolfson Microelectronics plc

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Pre-Production
ADC FILTER RESPONSES
Figure 87 ADC Digital Filter Frequency Response
ADC HIGH PASS FILTER RESPONSES
Figure 89 ADC Digital High Pass Filter Frequency
Response (48kHz, Hi-Fi Mode, ADC_HPF_CUT[1:0]=00)
MAGNITUDE(dB)
-100
-120
-140
2.1246m
-1.1717
-2.3455
-3.5193
-4.6931
-5.8669
-7.0407
-8.2145
-9.3883
-10.562
-11.736
-20
-40
-60
-80
20
0
0.00
1
2.6923
7.2484
0.25
19.515
52.54
Frequency (fs)
141.45
0.50
380.83
1.0253k
2.7605k
0.75
7.432k
20.009k
Figure 88 ADC Digital Filter Ripple
Figure 90 ADC Digital High Pass Filter Ripple (48kHz,
Voice Mode, ADC_HPF_CUT=01, 10 and 11)
hpf_response.res MAGNITUDE(dB)
hpf_response2.res#1 MAGNITUDE(dB)
-2.3338m
-0.02
-0.04
-0.06
-0.08
0.08
0.06
0.04
0.02
-8.3373
-16.672
-25.007
-33.342
-41.677
-50.012
-58.347
-66.682
-75.017
-83.352
-0.1
0.1
0
0.00
2
5.0248
12.624
31.716
79.683
Frequency (fs)
200.19
hpf_response2.res MAGNITUDE(dB)
0.25
502.96
PP, April 2009, Rev 3.0
1.2636k
3.1747k
WM8400
7.9761k
20.039k
195