Datasheet

−0.05
−0.04
−0.03
−0.02
−0.01
0.00
0.01
0.02
0.03
0.04
0.05
0.0 0.5 1.0
Frequency (x f
S
)
Amplitude (dB)
G031
−120
−100
−80
−60
−40
−20
0
0 1 2 3 4
Frequency (x f
S
)
Amplitude (dB)
G009
−0.4
−0.2
0.0
0.2
0.4
0.6
0.8
1.0
0 20 40 60 80 100 120 140 160
Samples
Amplitude (FFS)
G020
PCM5121, PCM5122
SLAS763A –AUGUST 2012–REVISED SEPTEMBER 2012 www.ti.com
Table 22. Normal x4 Interpolation Filter, Dual Rate
Parameter Condition Value (Typical) Value (Max) Units
Filter Gain Pass Band 0 ……. 0.45f
S
dB
Filter Gain Stop Band 0.55f
S
….. 3.455f
S
dB
Filter Group Delay 20/f
S
S
Figure 38. Normal x4 Interpolation Filter Frequency Figure 39. Normal x4 Interpolation Filter Impulse
Response Response
Figure 40. Normal x4 Interpolation Filter Passband Ripple
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