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
文件頁數(shù): 99/165頁
文件大?。?/td> 1895K
代理商: TLV320AIC36IZQE
)
t
(
OUT
_
ADC
_
RIGHT
)
t
(
COMP
_
PHASE
_
ADC
_
RIGHT
pr
-
=
(
)
FS
_
ADC
*
AOSR
k
*
AOSR
*
)
5
:
6
(
Delay
)
0
:
4
(
Delay
t
f
pr
+
=
)
t
(
OUT
_
ADC
_
LEFT
)
t
(
COMP
_
PHASE
_
ADC
_
LEFT
pl
-
=
FS
_
ADC
*
AOSR
)
7
(
Delay
tpl =
www.ti.com
SBAS387A – MAY 2009 – REVISED JUNE 2010
(5)
Where:
(6)
Where kf is a function of the decimation filter:
Decimation Filter Type
kf
A
0.25
B
0.5
C
1
and
(7)
Where:
(8)
5.9.3
DC Measurement
The TLV320AIC36 supports a highly flexible DC measurement feature using the high resolution
oversampling and noise-shaping ADC. This mode can be used when the particular ADC channel is not
used for the voice/audio record function. This mode can be enabled by programming Page 0, Register
102, D(7:6). The converted data is 24-bits, using 2.22 numbering format. The value of the converted data
for the left-channel ADC can be read back from Page 0, Register 104–106 and for the right-channel ADC
from Page 0, Register 107–109.
NOTE
Each group of three registers must be read in MSB-to-LSB order (ascending register
numbers) to properly latch the converted data.
Mode A
In DC-measurement mode A, a variable-length averaging filter is used. The length of the averaging filter
D, can be programmed from 1 to 20 by programming Page 0, Register 102, D(4:0). To choose mode A,
Page 0, Register 102, D(5) must be programmed to 0.
Mode B
To choose mode B Page 0, Register 102, D(5) must be programmed to 1. In DC-measurement mode B, a
first-order IIR filter is used. The coefficients of this filter are determined by D, Page 0, Register 102,
D(4:0). The nature of the filter is given in Table 5-11.
Copyright 2009–2010, Texas Instruments Incorporated
APPLICATION INFORMATION
39
Product Folder Link(s): TLV320AIC36
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