Datasheet

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)
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
TLV320DAC3100
www.ti.com SLAS671A –FEBRUARY 2010–REVISED MAY 2012
Figure 5-14. Frequency Response of DAC Interpolation Filter A
5.5.1.4.2 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 5-16. 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 5-15. Frequency Response of Channel Interpolation Filter B
5.5.1.4.3 Interpolation Filter C
Filter C is specifically designed for the 192-ksps mode. The pass band extends up to 0.4 × f
S
(corresponds to 80 kHz), more than sufficient for audio applications.
Copyright © 2010–2012, Texas Instruments Incorporated APPLICATION INFORMATION 29
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