參數(shù)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(shù)： 29/110頁
文件大?。?/td> 1230K
代理商： TLV320DAC3120IRHBR
1
0
1
15
1
N
N z
H(z)
2
D z
-
+
=
-
1
2
0
1
2
15
1
2
1
2
N
2 N z
N z
H(z)
2
2 D z
D z
-
+
+
=
-
-
www.ti.com
SLAS659 – NOVEMBER 2009
5.6.1.3.1 First-Order IIR Section
The IIR is of first order and its transfer function is given by
(1)
The frequency response for the first-order IIR section with default coefficients is flat.
Table 5-8. DAC IIR Filter Coefficients
DAC Coefficient,
Filter
Filter Coefficient
Default (Reset) Values
Mono Channel
First-order IIR
N0
Page 9 / registers 2–3
0x7FFF (decimal 1.0 – LSB value)
N1
Page 9 / registers 4–5
0x0000
D1
Page 9 / registers 6–7
0x0000
5.6.1.3.2 Biquad Section
The transfer function of each of the biquad filters is given by
(2)
Table 5-9. DAC Biquad Filter Coefficients
Filter
Coefficient
Mono DAC Channel
Default (Reset) Values
Biquad A
N0
Page 8 / registers 2–3
0x7FFF (decimal 1.0 – LSB value)
N1
Page 8 / registers 4–5
0x0000
N2
Page 8 / registers 6–7
0x0000
D1
Page 8 / registers 8–9
0x0000
D2
Page 8 / registers 10–11
0x0000
Biquad B
N0
Page 8 / registers 12–13
0x7FFF (decimal 1.0 – LSB value)
N1
Page 8 / registers 14–15
0x0000
N2
Page 8 / registers 16–17
0x0000
D1
Page 8 / registers 18–19
0x0000
D2
Page 8 / registers 20–21
0x0000
Biquad C
N0
Page 8 / registers 22–23
0x7FFF (decimal 1.0 – LSB value)
N1
Page 8 / registers 24–25
0x0000
N2
Page 8 / registers 26–27
0x0000
D1
Page 8 / registers 28–29
0x0000
D2
Page 8 / registers 30–31
0x0000
Biquad D
N0
Page 8 / registers 32–33
0x7FFF (decimal 1.0 – LSB value)
N1
Page 8 / registers 34–35
0x0000
N2
Page 8 / registers 36–37
0x0000
D1
Page 8 / registers 38–39
0x0000
D2
Page 8 / registers 40–41
0x0000
Biquad E
N0
Page 8 / registers 42–43
0x7FFF (decimal 1.0 – LSB value)
N1
Page 8 / registers 44–45
0x0000
N2
Page 8 / registers 46–47
0x0000
D1
Page 8 / registers 48–49
0x0000
D2
Page 8 / registers 50–51
0x0000
Copyright 2009, Texas Instruments Incorporated
APPLICATION INFORMATION
25
Product Folder Link(s): TLV320DAC3120
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