TSOP385(2018) 查看數據表（PDF） - Vishay Semiconductors
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TSOP385 Datasheet PDF : 7 Pages
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TSOP381.., TSOP383.., TSOP385..
Vishay Semiconductors
SUITABLE DATA FORMAT
This series is designed to suppress spurious output pulses
due to noise or disturbance signals. The devices can
distinguish data signals from noise due to differences in
frequency, burst length, and envelope duty cycle. The data
signal should be close to the device’s band-pass center
frequency (e.g. 38 kHz) and fulfill the conditions in the table
below.
When a data signal is applied to the product in the
presence of a disturbance, the sensitivity of the receiver is
automatically reduced by the AGC to insure that no spurious
pulses are present at the receiver’s output.
Some examples which are suppressed are:
• DC light (e.g. from tungsten bulbs sunlight)
• Continuous signals at any frequency
• Strongly or weakly modulated patterns from fluorescent
lamps with electronic ballasts (see Fig. 14 or Fig. 15)
16920
Axis Title
7
10000
6
5
1000
4
3
100
2
1
0
10
0
5
10
15
20
Time (ms)
Fig. 14 - IR Disturbance from Fluorescent Lamp
With Low Modulation
Axis Title
40
10000
20
1000
0
-20
100
-40
16921
-60
0
5
10
15
Time (ms)
10
20
Fig. 15 - IR Disturbance from Fluorescent Lamp
With High Modulation
Minimum burst length
After each burst of length
A gap time is required of
For bursts greater than
a minimum gap time in the data
stream is needed of
Maximum number of continuous
short bursts/second
MCIR code
RCMM code
XMP-1, XMP-2 code
Suppression of interference from
fluorescent lamps
TSOP381..
6 cycles/burst
6 to 70 cycles
≥ 10 cycles
70 cycles
> 1.2 x burst length
2000
Yes
Yes
Yes
Mild disturbance patterns
are suppressed (example:
signal pattern of Fig. 14)
TSOP383..
6 cycles/burst
6 to 35 cycles
≥ 10 cycles
35 cycles
> 6 x burst length
2000
Preferred
Preferred
Preferred
Complex disturbance patterns
are suppressed (example:
signal pattern of Fig. 15)
TSOP385..
6 cycles/burst
6 to 24 cycles
≥ 10 cycles
24 cycles
> 25 ms
2000
Yes
Yes
Yes
Critical disturbance
patterns are suppressed,
e.g. highly dimmed LCDs
Note
• For data formats with long bursts (more than 10 carrier cycles) please see the datasheet for TSOP382.., TSOP384..
Rev. 1.6, 12-Apr-18
5
Document Number: 81743
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
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