wm8953 Wolfson Microelectronics plc, wm8953 Datasheet - Page 97

• Manufacturer Part Number: wm8953
• Description: Low Power Stereo Adc With Pll And Tdm Interface Low Power Stereo Adc With Pll And Tdm Interface
• Manufacturer: Wolfson Microelectronics plc

ADC Filter
Passband
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
w
Production Data
DIGITAL FILTER CHARACTERISTICS
ADC FILTER RESPONSES
Figure 59 ADC Digital Filter Frequency Response
ADC HIGH PASS FILTER RESPONSES
Figure 61 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
PARAMETER
2.6923
7.2484
0.25
19.515
52.54
Frequency (fs)
141.45
0.50
TEST CONDITIONS
380.83
f > 0.546 fs
+/- 0.05dB
1.0253k
-6dB
2.7605k
0.75
7.432k
20.009k
0.546s
Figure 60 ADC Digital Filter Ripple
Figure 62 ADC Digital High Pass Filter Ripple (48kHz,
Voice Mode, ADC_HPF_CUT=01, 10 and 11)
MIN
hpf_response.res MAGNITUDE(dB)
hpf_response2.res#1 MAGNITUDE(dB)
-60
0
-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
0.5fs
18/fs
12.624
TYP
31.716
79.683
0.454 fs
Frequency (fs)
+/- 0.05
MAX
200.19
hpf_response2.res MAGNITUDE(dB)
0.25
PD, January 2009, Rev 4.0
502.96
1.2636k
UNIT
dB
dB
3.1747k
WM8953
7.9761k
20.039k
97