PCM1804
SLES022A – DECEMBER 2001
TYPICAL CHARACTERISTICS
linear phase antialias digital filter frequency response (continued)
PASSBAND RIPPLE CHARACTERISTICS AT
QUAD RATE FILTER
TRANSIENT BAND CHARACTERISTICS AT
QUAD RATE FILTER
0.02
0
–1
–2
–3
–4
–5
–6
–7
–8
f
= 192 kHz
f = 192 kHz
S
S
0
–0.02
–0.04
–0.06
–3.90 dB at 0.5 f
S
–0.08
–0.1
–9
–10
0
0.1
0.2
0.3
0.4
0.5
0.6
0.45
0.47
0.49
0.51
0.53
S
0.55
Normalized Frequency – × f
Normalized Frequency – × f
S
Figure 26
Figure 27
HPF (low-cut filter) frequency response
STOPBAND CHARACTERISTICS
0
PASSBAND CHARACTERISTICS
0.2
0
–0.2
–0.4
–0.6
–20
–40
–60
–80
–0.8
–1
–100
0
0.1
0.2
0.3
0.4
0
0.5
1
1.5
2
2.5
3
3.5
4
Normalized Frequency – × f /1000
S
Normalized Frequency – × f /1000
S
Figure 28
Figure 29
15
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