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參數(shù)資料
| 型號： | AIC1863CS |
| 廠商： | Analog Integrations Corporation |
| 英文描述： | IR Preamplifier for Remote Control System |
| 中文描述： | 紅外前置放大器遠(yuǎn)程控制系統(tǒng) |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 112K |
| 代理商： | AIC1863CS |
AIC1863
7
l
DESIGN GUIDE
SETTING THE CENTER FREQUENCY OF BAND
PASS FILTER
Connect a resistor from pin 7 to VCC to set the
center frequency of band pass filter. The center fre-
quency will be lower if the resistor value is higher.
The relationships between center frequency of band
pass filter and the resistance of external resistor
are tabulated as below:
f
0
(KHz)
33
36
R1(K
)
130
118
37
114
38
110
40
104
56.8
72
SETTING LCC CAPACITOR C1
With the transmitted data signal with duty cycle
lower than 0.4 (average, during the whole transmis-
sion), the detection sensitivity is unchanged all the
time. Otherwise, with the transmitted data signal
with duty cycle higher than 0.4, the detection sen-
sitivity will maintain unchanged for a proportional
time period and gradually be reduced due to in-
creasing control voltage at CA pin. Higher duty cy-
cle enables more reduction of detection sensitivity
in specific transmission time. Increasing the ca-
pacitance of C1 causes longer transmission time
as duty cycle higher than the maximum allowable
duty cycle.
GROUNDING
The AGND pin, DGND pin and all the external parts
are recommended to be connected as much as
possible to “one ground point” for good noise per-
formance.
n
PHYSICAL DIME NSIONS
l
8 LEAD PLASTIC SO (unit: mm)
SYMBOL
MIN
MAX
A
1.35
1.75
A1
0.10
0.25
B
0.33
0.51
C
0.19
0.25
D
4.80
5.00
E
3.80
4.00
e
1.27(TYP)
H
5.80
6.20
L
0.40
1.27
D
H
e
A
B
A
C
E
L
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