參數(shù)資料
型號： TLV320AIC3110IRHBT
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： AUDIO AMPLIFIER, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁數(shù)： 56/126頁
文件大?。?/td> 1528K
代理商： TLV320AIC3110IRHBT
www.ti.com
SLAS647 – DECEMBER 2009
ADC FIR Filter Coefficients (continued)
Filter
FIlter Coefficient RAM
Default (Reset) Values – Not Valid for the FIR Filter – Must
Coefficient
Location
Be Reprogrammed by User
Fir17
Page 4 / register 48
0x0000
and page 4 / register 49
Fir18
Page 4 / register 50
0x0000
and page 4 / register 51
Fir19
Page 4 / register 52
0x0000
and page 4 / register 53
Fir20
Page 4 / register 54
0x7FFF (decimal 1.0 – LSB value)
and page 4 / register 55
Fir21
Page 4 / register 56
0x0000
and page 4 / register 57
Fir22
Page 4 / register 58
0x0000
and page 4 / register 59
Fir23
Page 4 / register 60
0x0000
and page 4 / register 61
Fir24
Page 4 / register 62
0x0000
and page 4 / register 63
5.4.4.4
ADC Digital Decimation Filter Characteristics
The TLV320AIC3110 offers three different types of decimation filters. The integrated digital decimation
filter removes high-frequency content and downsamples the audio data from an initial sampling rate of
AOSR × fS to the final output sampling rate of fS. The decimation filtering is achieved using a higher-order
CIC filter followed by linear-phase FIR filters. The decimation filter cannot be chosen by itself; it is implicitly
set through the chosen processing block.
The following subsections describe the properties of the available filters A, B, and C.
5.4.4.4.1 Decimation Filter A
This filter is intended for use at sampling rates up to 48 kHz. When configuring this filter, the oversampling
ratio of the ADC can either be 128 or 64. For highest performance, the oversampling ratio must be set
to 128.
Filter A can also be used up to 96 kHz with an AOSR of 64.
Table 5-20. ADC Decimation Filter A, Specification
Parameter
Condition
Value (Typical)
Unit
AOSR = 128
Filter gain pass band
0 … 0.39 fS
0.062
dB
Filter gain stop band
0.55 … 64 fS
–73
dB
Filter group delay
17/fS
s
Pass-band ripple, 8 ksps
0 … 0.39 fS
0.062
dB
Pass-band ripple, 44.1 ksps
0 … 0.39 fS
0.05
dB
Pass-band ripple, 48 ksps
0 … 0.39 fS
0.05
dB
AOSR = 64
Filter gain pass band
0 … 0.39 fS
0.062
dB
Filter gain stop band
0.55 … 32 fS
–73
dB
Filter group delay
17/fS
s
Pass-band ripple, 8 ksps
0 … 0.39 fS
0.062
dB
Pass-band ripple, 44.1 ksps
0 … 0.39 fS
0.05
dB
Pass-band ripple, 48 ksps
0 … 0.39 fS
0.05
dB
Pass-band ripple, 96 ksps
0 … 20 kHz
0.1
dB
Copyright 2009, Texas Instruments Incorporated
APPLICATION INFORMATION
35
Product Folder Link(s): TLV320AIC3110
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