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參數(shù)資料
| 型號： | TSOP34840 |
| 廠商： | Vishay Intertechnology,Inc. |
| 英文描述： | IR Receiver Modules for Remote Control Systems |
| 中文描述： | 紅外接收器模塊遠(yuǎn)程控制系統(tǒng) |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 174K |
| 代理商： | TSOP34840 |
TSOP348..SI1
Vishay Semiconductors
Document Number 82210
Rev. 1.2, 28-Feb-05
www.vishay.com
5
Suitable Data Format
The circuit of the TSOP348..SI1 is designed in that
disturbance signals are avoided. A bandpass filter, an
integrator stage and an automatic gain control are
used to suppress such disturbances.
The distinguishing mark between data signal and dis-
turbance signal are carrier frequency, burst length
and duty cycle.
The data signal should fulfill the following conditions:
Carrier frequency should be close to center fre-
quency of the bandpass (e.g. 38 kHz).
Burst length should be 10 cycles/burst or longer.
After each burst which is between 10 cycles and 70
cycles a gap time of at least 14 cycles is necessary.
For each burst which is longer than 1.8 ms a corre-
sponding gap time is necessary at some time in the
data stream. This gap time should be at least 4 times
longer than the burst.
Up to 800 short bursts per second can be received
continuously.
Some examples for suitable data format are: NEC
Code (repetitive pulse), NEC Code (repetitive data),
Toshiba Micom Format, Sharp Code, RC5 Code,
RC6 Code, R-2000 Code, Sony Code.
When a disturbance signal is applied to the
TSOP348..SI1 it can still receive the data signal.
However the sensitivity is reduced to that level that no
unexpected pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP348..SI1 are:
DC light (e.g. from tungsten bulb or sunlight)
Continuous signal at 38 kHz or at any other fre-
quency
Signals from fluorescent lamps with electronic bal-
last with high or low modulation
(see Figure 14 or Figure 15).
Figure 13. Sensitivity vs. Supply Voltage
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Figure 14. IR Signal from Fluorescent Lamp with low Modulation
Figure 15. IR Signal from Fluorescent Lamp with high Modulation
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10
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Time
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ms
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16
9
20
I
R
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n
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R
Si
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nal
f
rom
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luorescent
lamp
w
it
h
lo
w
modulation
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Time
(
ms
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16
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I
R
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f
rom
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luorescent
lamp
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it
h h
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gh
modulation
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| TSOP34840 | 制造商:Vishay Semiconductors 功能描述:IR Emitting Diode |
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| TSOP34856 | 功能描述:紅外接收機(jī) 2.7-5.5V 56kHz RoHS:否 制造商:Vishay Semiconductors 載頻:20 kHz to 60 kHz 傳輸距離:5 m 顯示角:+/- 50 deg 高電平脈沖寬度: 低電平脈沖寬度: 最小高電平輸出電壓: 輸出電流:5 mA 工作電壓:2.5 V to 5.5 V 電源電流:0.9 mA 功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 25 C 封裝 / 箱體: 封裝:Reel |
| TSOP35138TR | 制造商:Vishay Semiconductors 功能描述: |
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