Pre-Production
WM8904
ADC FILTER RESPONSES
Figure 6 ADC Digital Filter Frequency Response
Figure 7 ADC Digital Filter Ripple
ADC HIGH PASS FILTER RESPONSES
2.1246m
-1.1717
-2.3455
-3.5193
-4.6931
-5.8669
-7.0407
-8.2145
-9.3883
-10.562
-11.736
-2.3338m
-8.3373
-16.672
-25.007
-33.342
-41.677
-50.012
-58.347
-66.682
-75.017
-83.352
1
2.6923
7.2484
19.515
52.54
141.45
380.83
1.0253k
2.7605k
7.432k
20.009k
2
5.0248
12.624
31.716
79.683
200.19
502.96
1.2636k
3.1747k
7.9761k
20.039k
MAGNITUDE(dB)
hpf_response.res MAGNITUDE(dB)
hpf_response2.res MAGNITUDE(dB)
hpf_response2.res#1 MAGNITUDE(dB)
Figure 8 ADC Digital High Pass Filter Frequency Response
(48kHz, Hi-Fi Mode, ADC_HPF_CUT[1:0]=00)
Figure 9 ADC Digital High Pass Filter Ripple (48kHz,
Voice Mode, ADC_HPF_CUT=01, 10 and 11)
PP, Rev 3.3, September 2012
31
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
