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參數資料
型號: TLV320DAC3120IRHBR
廠商: TEXAS INSTRUMENTS INC
元件分類: DAC
英文描述: SERIAL INPUT LOADING, 24-BIT DAC, PQCC32
封裝: 5 X 5 MM, PLASTIC, QFN-32
文件頁數: 30/110頁
文件大小: 1230K
代理商: TLV320DAC3120IRHBR
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
1
3
4
5
6
7
2
Magnitude
dB
FrequencyNormalizedtofS
DACChannelResponseforInterpolationFilter A
(RedLineCorrespondsto –65dB)
SLAS659 – NOVEMBER 2009
www.ti.com
Table 5-9. DAC Biquad Filter Coefficients (continued)
Filter
Coefficient
Mono DAC Channel
Default (Reset) Values
Biquad F
N0
Page 8 / registers 52–53
0x7FFF (decimal 1.0 – LSB value)
N1
Page 8 / registers 54–55
0x0000
N2
Page 8 / registers 56–57
0x0000
D1
Page 8 / registers 58–59
0x0000
D2
Page 8 / registers 60–61
0x0000
5.6.1.4
DAC Interpolation Filter Characteristics
5.6.1.4.1 Interpolation Filter A
Filter A is designed for an fS up to 48 ksps with a flat pass band of 0 kHz–20 kHz.
Table 5-10. Specification for DAC Interpolation Filter A
Parameter
Condition
Value (Typical)
Unit
Filter-gain pass band
0 … 0.45 fS
±0.015
dB
Filter-gain stop band
0.55 fS… 7.455 fS
–65
dB
Filter group delay
21/fS
s
Figure 5-11. Frequency Response of DAC Interpolation Filter A
5.6.1.4.2 Interpolation Filter B
Filter B is specifically designed for an fS up to 96 ksps. Thus, the flat pass-band region easily covers the
required audio band of 0 kHz–20 kHz.
Table 5-11. Specification for DAC Interpolation Filter B
Parameter
Condition
Value (Typical)
Unit
Filter-gain pass band
0 … 0.45 fS
±0.015
dB
Filter-gain stop band
0.55 fS … 3.45 fS
–58
dB
Filter group delay
18/fS
s
26
APPLICATION INFORMATION
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC3120
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