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PDF TSOP11238 Data sheet ( Hoja de datos )
| Número de pieza | TSOP11238 | |
| Descripción | (TSOP112xx) IR Receiver Modules | |
| Fabricantes | Vishay Intertechnology | |
| Logotipo |  |
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TSOP112..
Vishay Semiconductors
IR Receiver Modules for Remote Control Systems
Description
The TSOP112.. - series are miniaturized receivers for
infrared remote control systems. PIN diode and
preamplifier are assembled on lead frame, the epoxy
package is designed as IR filter.
The demodulated output signal can directly be
decoded by a microprocessor. TSOP112.. is the stan-
dard IR remote control receiver series, supporting all
major transmission codes.
1
2
3
94 8691
Features
• Photo detector and preamplifier in one
package
• Internal filter for PCM frequency
• Improved shielding against electrical
field disturbance
e3
• TTL and CMOS compatibility
• Output active low
• Low power consumption
• High immunity against ambient light
• Lead (Pb)-free component
• Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
Mechanical Data
Pinnout: 1 = GND, 2 = Vs, 3 = Out
Special Features
• Improved immunity against ambient light
• Suitable burst length ≥ 10 cycles/burst
Parts Table
Part
TSOP11233
TSOP11236
TSOP11238
TSOP11240
Carrier Frequency
33 kHz
36 kHz
38 kHz
40 kHz
Block Diagram
Application Circuit
16832_1
35 kΩ
Input
AGC
Band Demo-
Pass dulator
PIN Control Circuit
2
VS
3
OUT
1
GND
17434_1
Transmitter
with
TSALxxxx
HSxxxx
R1 = 100 Ω
VS C1 =
4.7 µF
OUT
GND
VO
+VS
µC
GND
R1 + C1 recommended to suppress power supply
disturbances.
The output voltage should not be hold continuously at
a voltage below VO = 3.5 V by the external circuit.
Document Number 81454
Rev. 1.0, 05-Sep-06
www.vishay.com
1
1 page  
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TSOP112..
Vishay Semiconductors
0° 10° 20°
30°
• 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).
40°
1.0
0.9 50°
0.8 60°
70°
0.7
80°
0.6 0.4 0.2 0 0.2 0.4 0.6
95 11339p2 drel - Relative Transmission Distance
Figure 13. Vertical Directivity ϕy
IR Signal from fluorescent
lamp with low modulation
Suitable Data Format
The circuit of the TSOP112.. is designed in that way
that unexpected output pulses due to noise or distur-
bance signals are avoided. A bandpass filter, an inte-
grator 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 neces-
sary.
• 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
TSOP112.. it can still receive the data signal. How-
ever the sensitivity is reduced to that level that no
unexpected pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP112.. are:
• DC light (e.g. from tungsten bulb or sunlight)
16920
0
5 10 15
Time (ms)
20
Figure 14. IR Signal from Fluorescent Lamp with low Modulation
IR Signal from fluorescent
lamp with high modulation
0
16921
5 10 15
Time (ms)
20
Figure 15. IR Signal from Fluorescent Lamp with high Modulation
Document Number 81454
Rev. 1.0, 05-Sep-06
www.vishay.com
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet TSOP11238.PDF ] | |
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