82107 Datasheet, PDF (4/7 Pages) Vishay Siliconix – IR Receiver Modules for Remote Control Systems

TSOP22..YA1
Vishay Semiconductors
VISHAY
0.8
0.7
0.6
0.5
0.4
0.3
0.2
f = 38 kHz, E_e = 2 mW/m²
0.1
0.0
0 20 40 60 80 100 120
16913
Burst Length ( number of cycles / burst )
Figure 9. Max. Envelope Duty Cycle vs. Burstlength
0.6
0.5 ^{Sensitivity in dark ambient}
0.4
0.3
0.2
0.1
0.0
–30 –15 0 15 30 45 60 75 90
16918
T_amb – Ambient Temperature ( qC )
Figure 10. Sensitivity vs. Ambient Temperature
1.2
1.0
0.8
0.6
0.4
0.2
0.0
750
16919
850
950
1050
l – Wavelength ( nm )
1150
Figure 11. Relative Spectral Sensitivity vs. Wavelength
Document Number 82107
Rev. 5, 15-Oct-2002
0q 10q 20q
30q
40q
1.0
0.9
50q
0.8
60q
70q
0.7
80q
0.6 0.4 0.2 0 0.2 0.4 0.6
96 12223p2
d_rel – Relative Transmission Distance
Figure 12. Directivity
Suitable Data Format
The circuit of the TSOP22..YA1 is designed in that
way that unexpected output pulses due to noise or
disturbance signals are avoided. A bandpassfilter, 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
TSOP22..YA1 it can still receive the data signal. How-
ever the sensitivity is reduced to that level that no
unexpected pulses will occure.
Some examples for such disturbance signals which
are suppressed by the TSOP22..YA1 are:
• DC light (e.g. from tungsten bulb or sunlight)
• Continuous signal at 38 kHz or at any other fre-
quency
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