Datasheet

DACChannelResponseforInterpolationFilterB
(RedLineCorrespondsto –58dB)
0.5 1 1.5 2 2.5 3 3.5
FrequencyNormalizedtof
S
0
–10
–20
–30
–40
–50
–60
–70
–80
Magnitude – dB
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
1
3 4
5 6
7
2
Magnitude – dB
FrequencyNormalizedtof
S
DACChannelResponseforInterpolationFilter A
(RedLineCorrespondsto –65dB)
TLV320AIC3120
www.ti.com SLAS653A –FEBRUARY 2010–REVISED MAY 2012
Table 5-24. Specification for DAC Interpolation Filter A
Parameter Condition Value (Typical) Unit
Filter-gain pass band 0… 0.45 f
S
±0.015 dB
Filter-gain stop band 0.55 f
S
… 7.455 f
S
–65 dB
Filter group delay 21/f
S
s
Figure 5-28. Frequency Response of DAC Interpolation Filter A
5.6.1.4.2 Interpolation Filter B
Filter B is specifically designed for an f
S
up to 96 ksps. Thus, the flat pass-band region easily covers the
required audio band of 0 kHz–20 kHz.
Table 5-25. Specification for DAC Interpolation Filter B
Parameter Condition Value (Typical) Unit
Filter-gain pass band 0…0.45 f
S
±0.015 dB
Filter-gain stop band 0.55 f
S
…3.45 f
S
–58 dB
Filter group delay 18/f
S
s
Figure 5-29. Frequency Response of Channel Interpolation Filter B
Copyright © 2010–2012, Texas Instruments Incorporated APPLICATION INFORMATION 49
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