參數(shù)資料
型號(hào): TLV320AIC36IZQE
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA80
封裝: 5 X 5 MM, GREEN, PLASTIC, VFBGA-80
文件頁(yè)數(shù): 88/165頁(yè)
文件大?。?/td> 1895K
代理商: TLV320AIC36IZQE
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www.ti.com
SBAS387A – MAY 2009 – REVISED JUNE 2010
5.8
ADC Decimation Filtering and Signal Processing
The TLV320AIC36 ADC channel includes a built-in digital decimation filter to process the oversampled
data from the sigma-delta modulator to generate digital data at Nyquist sampling rate with high dynamic
range. The decimation filter can be chosen from three different types, depending on the required
frequency response, group delay and sampling rate.
5.8.1
Processing Blocks
The TLV320AIC36 offers a range of processing blocks which implement various signal processing
capabilities along with decimation filtering. These processing blocks give users the choice of how much
and what type of signal processing they may use and which decimation filter is applied.
The choice between these processing blocks is part of a strategy to balance power conservation and
signal-processing flexibility. Less signal-processing capability reduces the power consumed by the device.
Table 5-4 gives an overview of the available processing blocks of the ADC channel and their properties.
The Resource Class (RC) Column gives an approximate indication of power consumption. Page 0,
Register 61 is used to select one of the 18 processing blocks.
The signal processing blocks available are:
First-order IIR
Scalable number of biquad filters
Variable-tap FIR filter
AGC
The processing blocks are tuned for common cases and can achieve high anti-alias filtering or low-group
delay in combination with various signal processing effects such as audio effects and frequency shaping.
The available first-order IIR, BiQuad, and FIR filters have fully user programmable coefficients.
Table 5-4. ADC Processing Blocks
Processing
Channel
Decimation
First-Order
Number
FIR
Required
Resource
Blocks
Filter
IIR Available
BiQuads
AOSR Value
Class
PRB_R1
Stereo
A
Yes
0
No
128,64
6
PRB_R2
Stereo
A
Yes
5
No
128,64
8
PRB_R3
Stereo
A
Yes
0
25-Tap
128,64
8
PRB_R4
Right
A
Yes
0
No
128,64
3
PRB_R5
Right
A
Yes
5
No
128,64
4
PRB_R6
Right
A
Yes
0
25-Tap
128,64
4
PRB_R7
Stereo
B
Yes
0
No
64
3
PRB_R8
Stereo
B
Yes
3
No
64
4
PRB_R9
Stereo
B
Yes
0
20-Tap
64
4
PRB_R10
Right
B
Yes
0
No
64
2
PRB_R11
Right
B
Yes
3
No
64
2
PRB_R12
Right
B
Yes
0
20-Tap
64
2
PRB_R13
Stereo
C
Yes
0
No
32
3
PRB_R14
Stereo
C
Yes
5
No
32
4
PRB_R15
Stereo
C
Yes
0
25-Tap
32
4
PRB_R16
Right
C
Yes
0
No
32
2
PRB_R17
Right
C
Yes
5
No
32
2
PRB_R18
Right
C
Yes
0
25-Tap
32
2
Copyright 2009–2010, Texas Instruments Incorporated
APPLICATION INFORMATION
29
Product Folder Link(s): TLV320AIC36
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