參數(shù)資料
型號： TLV320AIC36IZQE
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PBGA80
封裝： 5 X 5 MM, GREEN, PLASTIC, VFBGA-80
文件頁數(shù)： 108/165頁
文件大?。?/td> 1895K
代理商： TLV320AIC36IZQE
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www.ti.com
SBAS387A – MAY 2009 – REVISED JUNE 2010
5.11.3 User Programmable Filters
Depending on the selected processing block, different types and orders of digital filtering are available. Up
to six biquad sections are available for specific processing blocks.
The coefficients of the available filters are arranged as sequentially-indexed coefficients in two banks. If
adaptive filtering is chosen, the coefficient banks can be switched on-the-fly. For more details on adaptive
filtering please see Section 5.14.3.
The coefficients of these filters are each 16 bits wide, in twos complement, and occupy two consecutive
8-bit registers in the register space. For default values please see the Register Map section.
5.11.3.1 First-Order IIR Section
The IIR is of first-order and its transfer function is given by
(9)
The frequency response for the first-order IIR Section with default coefficients is flat
Table 5-13. DAC IIR Filter Coefficients
Filter
Filter Coefficient
ADC Coefficient Left Channel
ADC Coefficient Right
Channel
N0
C65 (Pg 9, Reg 2 and 3)
C68 (Pg 9, Reg 8 and 9)
First-order IIR
N1
C66 (Pg 9, Reg 4 and 5)
C69 (Pg 9, Reg 10 and 11)
D1
C67 (Pg 9, Reg 6 and 7)
C70 (Pg 9, Reg 12 and 13)
5.11.3.2 Biquad Section
The transfer function of each biquad filters is given by:
(10)
Table 5-14. DAC Biquad Filter Coefficients
Filter
Coefficient
Left DAC Channel
Right DAC Channel
BIQUAD A
N0
C1 (Pg 8, Reg 2 and 3)
C33 (Pg 8, Reg 66 and 67)
N1
C2 (Pg 8, Reg 4 and 5)
C34 (Pg 8, Reg 68 and 69)
N2
C3 (Pg 8, Reg 6 and 7)
C35 (Pg 8, Reg 70 and 71)
D1
C4 (Pg 8, Reg 8 and 9)
C36 (Pg 8, Reg 72 and 73)
D2
C5 (Pg 8, Reg 10 and 11)
C37 (Pg 8, Reg 74 and 75)
BIQUAD B
N0
C6 (Pg 8, Reg 12 and 13)
C38 (Pg 8, Reg 76 and 77)
N1
C7 (Pg 8, Reg 14 and 15)
C39 (Pg 8, Reg 78 and 79)
N2
C8 (Pg 8, Reg 16 and 172)
C40 (Pg 8, Reg 80 and 81)
D1
C9 (Pg 8, Reg 18 and 19)
C41 (Pg 8, Reg 82 and 83)
D2
C10 (Pg 8, Reg 20 and 21)
C42 (Pg 8, Reg 84 and 85)
BIQUAD C
N0
C11 (Pg 8, Reg 22 and 23)
C43 (Pg 8, Reg 86 and 87)
N1
C12 (Pg 8, Reg 24 and 25)
C44 (Pg 8, Reg 88 and 89)
N2
C13 (Pg 8, Reg 26 and 27)
C45 (Pg 8, Reg 90 and 91)
D1
C14 (Pg 8, Reg 28 and 29)
C46 (Pg 8, Reg 92 and 93)
D2
C15 (Pg 8, Reg 30 and 31)
C47 (Pg 8, Reg 94 and 95)
BIQUAD D
N0
C16 (Pg 8, Reg 32 and 33)
C48 (Pg 8, Reg 96 and 97)
N1
C17 (Pg 8, Reg 34 and 35)
C49 (Pg 8, Reg 98 and 99)
Copyright 2009–2010, Texas Instruments Incorporated
APPLICATION INFORMATION
47
Product Folder Link(s): TLV320AIC36
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