TSOP31230(2008) Просмотр технического описания (PDF) - Vishay Semiconductors
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TSOP31230 Datasheet PDF : 8 Pages
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TSOP312.., TSOP314..
Vishay Semiconductors
IR Receiver Modules for
Remote Control Systems
SUITABLE DATA FORMAT
The TSOP312.., TSOP314.. series are designed to suppress
spurious output pulses due to noise or disturbance signals.
Data and disturbance signals can be distinguished by the
devices according to carrier frequency, burst length and
envelope duty cycle. The data signal should be close to the
band-pass center frequency (e.g. 38 kHz) and fulfill the
conditions in the table below.
When a data signal is applied to the TSOP312.., TSOP314..
in the presence of a disturbance signal, the sensitivity of the
receiver is reduced to insure that no spurious pulses are
present at the output. Some examples of disturbance signals
which are suppressed are:
• DC light (e.g. from tungsten bulb or sunlight)
• Continuous signals at 38 kHz or at any frequency
• Strongly or weakly modulated noise from fluorescent
lamps with electronic ballasts (see figure 15 or figure 16)
IR Signal from Fluorescent
Lamp with Low Modulation
0
5
10
15
20
16920
Time (ms)
Fig. 15 - IR Signal from Fluorescent Lamp
with Low Modulation
IR Signal from Fluorescent
Lamp with High Modulation
0
16921
10
10
15
20
Time (ms)
Fig. 16 - IR Signal from Fluorescent Lamp
with High Modulation
TSOP312..
Minimum burst length
10 cycles/burst
After each burst of length
a minimum gap time is required of
10 to 70 cycles
≥ 10 cycles
For bursts greater than
a minimum gap time in the data stream is needed of
70 cycles
> 4 x burst length
Maximum number of continuous short bursts/second
1800
Compatible to NEC code
yes
Compatible to RC5/RC6 code
yes
Compatible to Sony code
yes
Compatible to Thomson 56 kHz code
yes
Compatible to Mitsubishi code (38 kHz, preburst 8 ms, 16 bit)
yes
Compatible to Sharp code
yes
Suppression of interference from fluorescent lamps
Most common disturbance
signals are suppressed
Note
For data formats with short bursts please see the datasheet for TSOP311.., TSOP313..
TSOP314..
10 cycles/burst
10 to 35 cycles
≥ 10 cycles
35 cycles
> 10 x burst length
1500
yes
yes
no
yes
no
yes
Even extreme disturbance
signals are suppressed
www.vishay.com
74
Document Number: 81745
Rev. 1.2, 19-Aug-08
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