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TSOP34830 Datasheet(PDF) 5 Page - Vishay Siliconix

Part No. TSOP34830
Description  IR Receiver Modules for Remote Control Systems
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
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TSOP34830 Datasheet(HTML) 5 Page - Vishay Siliconix

   
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Document Number: 81732
www.vishay.com
Rev. 1.2, 20-Aug-08
125
New TSOP348.., TSOP344..
IR Receiver Modules for
Remote Control Systems
Vishay Semiconductors
SUITABLE DATA FORMAT
The TSOP348.., TSOP344.. 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 TSOP348.., TSOP344..
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 any frequency
• Strongly or weakly modulated noise from fluorescent
lamps with electronic ballasts (see figure 14 or figure 15)
Fig. 14 - IR Signal from Fluorescent Lamp
with Low Modulation
Fig. 15 - IR Signal from Fluorescent Lamp
with High Modulation
Note
For data formats with short bursts please see the datasheet for TSOP341.., TSOP343..
010
15
20
Time (ms)
16920
IR Signal from Fluorescent
Lamp with Low Modulation
5
010
15
20
Time (ms)
16921
IR Signal from Fluorescent
Lamp with High Modulation
10
TSOP348..
TSOP344..
Minimum burst length
10 cycles/burst
10 cycles/burst
After each burst of length
a minimum gap time is required of
10 to 70 cycles
≥ 10 cycles
10 to 35 cycles
≥ 10 cycles
For bursts greater than
a minimum gap time in the data stream is needed of
70 cycles
> 4 x burst length
35 cycles
> 10 x burst length
Maximum number of continuous short bursts/second
1800
1500
Compatible to NEC code
yes
yes
Compatible to RC5/RC6 code
yes
yes
Compatible to Sony code
yes
no
Compatible to Thomson 56 kHz code
yes
yes
Compatible to Mitsubishi code (38 kHz, preburst 8 ms, 16 bit)
yes
no
Compatible to Sharp code
yes
yes
Suppression of interference from fluorescent lamps
Most common disturbance
signals are suppressed
Even extreme disturbance
signals are suppressed


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