wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 24

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

WM8918
DMIC FILTER RESPONSES
Figure 6 DMIC Digital Filter Frequency Response
DMIC HIGH PASS FILTER RESPONSES
Figure 8 DMIC Digital High Pass Filter Frequency
Response (48kHz, Hi-Fi Mode, DMIC_HPF_CUT[1:0]=00)
w
MAGNITUDE(dB)
2.1246m
-1.1717
-2.3455
-3.5193
-4.6931
-5.8669
-7.0407
-8.2145
-9.3883
-10.562
-11.736
1
2.6923
7.2484
19.515
52.54
141.45
380.83
1.0253k
2.7605k
7.432k
20.009k
Figure 7 DMIC Digital Filter Ripple
Figure 9 DMIC Digital High Pass Filter Ripple (48kHz,
Voice Mode, DMIC_HPF_CUT=01, 10 and 11)
hpf_response.res MAGNITUDE(dB)
hpf_response2.res#1 MAGNITUDE(dB)
-2.3338m
-8.3373
-16.672
-25.007
-33.342
-41.677
-50.012
-58.347
-66.682
-75.017
-83.352
2
5.0248
12.624
31.716
79.683
200.19
PD, Rev 4.0, September 2010
hpf_response2.res MAGNITUDE(dB)
502.96
1.2636k
3.1747k
Production Data
7.9761k
20.039k
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