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)
TLV320DAC3101
www.ti.com SLAS666A –JANUARY 2010–REVISED MAY 2012
Table 5-14. DAC Biquad Filter Coefficients (continued)
Default (Reset)
Filter Coefficient Left DAC Channel Right DAC Channel
Value
Biquad N0 Page 8 / register 42 and page 8 / register 43 Page 8 / register 106 and page 8 / register 0x7FFF (decimal
E 107 1.0 – LSB value)
N1 Page 8 / register 44 and page 8 / register 45 Page 8 / register 108 and page 8 / register 0x0000
109
N2 Page 8 / register 46 and page 8 / register 47 Page 8 / register 110 and page 8 / register 0x0000
111
D1 Page 8 / register 48 and page 8 / register 49 Page 8 / register 112 and page 8 / register 0x0000
113
D2 Page 8 / register 50 and page 8 / register 51 Page 8 / register 114 and page 8 / register 0x0000
115
Biquad N0 Page 8 / register 52 and page 8 / register 53 Page 8 / register 116 and page 8 / register 0x7FFF (decimal
F 117 1.0 – LSB value)
N1 Page 8 / register 54 and page 8 / register 55 Page 8 / register 118 and page 8 / register 0x0000
119
N2 Page 8 / register 56 and page 8 / register 57 Page 8 / register 120 and page 8 / register 0x0000
121
D1 Page 8 / register 58 and page 8 / register 59 Page 8 / register 122 and page 8 / register 0x0000
123
D2 Page 8 / register 60 and page 8 / register 61 Page 8 / register 124 and page 8 / register 0x0000
125
5.5.1.4 DAC Interpolation Filter Characteristics
5.5.1.4.1 Interpolation Filter A
Filter A is designed for an f
S
up to 48 ksps with a flat pass band of 0 kHz–20 kHz.
Table 5-15. 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 5-14. Frequency Response of DAC Interpolation Filter A
Copyright © 2010–2012, Texas Instruments Incorporated APPLICATION INFORMATION 31
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