參數(shù)資料
型號: TB1305FG
元件分類: 信號分離
英文描述: SYNC SEPARATOR IC, PQFP48
封裝: 10 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 7/33頁
文件大小: 660K
代理商: TB1305FG
TB1305FG, TB1308FG
2007-07-11
15
Prefilter for AD converter
The filter of the TB1305FG and TB1308FG can be used as a prefilter for AD converter. The cutoff frequency is
controllable by I2CBUS functions, FILPASS, f0-SW, BANDWIDTH and fc HALF.
The characteristics for cutoff frequency and delay time are as below.
-50
-40
-30
-20
-10
0
10
1.E+04
1.E+05
1.E+06
1.E+07
1.E+08
Frequency [Hz]
Ga
in
[
d
B
]
f0 SW = Low, BANDWIDTH = min, fc HALF = ON
f0 SW = Low, BANDWIDTH = min
f0 SW = High, BANDWIDTH = min
f0 SW = High, BANDWIDTH = max
Figure. Typical prefilter frequency characteristics
0
5
10
15
20
25
30
35
0
2040
6080
100
120
BANDWIDTH data [Dec]
C
u
to
ff
fr
eq
ue
nc
y(-3
dB
po
in
t)
[M
H
z]
f0 SW = Low, fc HALF = ON
f0 SW = High, fc HALF = ON
f0 SW = Low
f0 SW = High
Figure. Typical cutoff frequency (-3 dB point) characteristics of prefilter due to
BANDWIDTH data.
10k
100k
1M
10M
100M
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