VISHAY
TSOP348..RF1
Vishay Semiconductors
IR Receiver Modules for Remote Control Systems
Description
The TSOP348..RF1 - series are miniaturized receiv-
ers 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. TSOP348..RF1 is the
standard IR remote control receiver series for 3 V
supply voltage, supporting all major transmission
codes.
1
2
16666
3
Features
• Photo detector and preamplifier in one package
• Internal filter for PCM frequency
• Improved shielding against electrical field
disturbance
• TTL and CMOS compatibility
• Output active low
• Supply voltage: 2.7 V to 5.5 V
• Improved immunity against ambient light
Parts Table
Part
TSOP34830RF1
TSOP34833RF1
TSOP34836RF1
TSOP34837RF1
TSOP34838RF1
TSOP34840RF1
TSOP34856RF1
Carrier Frequency
30 kHz
33 kHz
36 kHz
36.7 kHz
38 kHz
40 kHz
56 kHz
Mechanical Data
Pinning:
1 = OUT, 2 = GND, 3 = V
S
Block Diagram
Application Circuit
16833
3
30 kΩ
Input
PIN
AGC
Band
Pass
Demo-
dulator
V
S
17170
OUT
Circuit
1
Transmitter
TSOPxxxx
with
TSALxxxx
R
1
= 100
Ω
V
S
C
1
=
4.7 µF
V
O
+V
S
OUT
GND
µC
GND
2
Control Circuit
GND
R
1
+ C
1
recommended to suppress power supply
disturbances.
The output voltage should not be hold continuously at
a voltage below V
O =
2.0 V by the external circuit.
Document Number 82237
Rev. 1, 16-Jun-03
www.vishay.com
1
TSOP348..RF1
Vishay Semiconductors
Absolute Maximum Ratings
T
amb
= 25 °C, unless otherwise specified
Parameter
Supply Voltage
Supply Current
Output Voltage
Output Current
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Power Consumption
Soldering Temperature
(T
amb
≤
85 °C)
t
≤
10 s, 1 mm from case
(Pin 3)
(Pin 3)
(Pin 1)
(Pin 1)
Test condition
Symbol
V
S
I
S
V
O
I
O
T
j
T
stg
T
amb
P
tot
T
sd
Value
- 0.3 to + 6.0
3
- 0.3 to
(V
S
+ 0.3)
10
100
- 25 to + 85
- 25 to + 85
30
260
VISHAY
Unit
V
mA
V
mA
°C
°C
°C
mW
°C
Electrical and Optical Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Supply Current (Pin 3)
Supply Voltage
Transmission Distance
E
v
= 0, test signal see fig.1,
IR diode TSAL6200,
I
F
= 250 mA
I
OSL
= 0.5 mA, E
e
= 0.7 mW/m
2
,
test signal see fig. 1
V
S
= 3 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig.1
V
S
= 3 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig.1
V
S
= 5 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig.1
V
S
= 5 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig.1
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 1
Angle of half transmission
distance
E
v
= 0
E
v
= 40 klx, sunlight
Test condition
Symbol
I
SD
I
SH
V
S
d
2.7
35
Min
0.7
Typ.
1.2
1.3
5.5
Max
1.5
Unit
mA
mA
V
m
Output Voltage Low (Pin 1)
Irradiance (30-40 kHz)
V
OSL
E
e min
0.2
250
0.4
mV
mW/m
2
Irradiance (56 kHz)
E
e min
0.3
0.5
mW/m
2
Irradiance (30-40 kHz)
E
e min
0.35
0.5
mW/m
2
Irradiance (56 kHz)
E
e min
0.45
0.6
mW/m
2
Irradiance
Directivity
E
e max
ϕ
1/2
30
± 45
W/m
2
deg
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2
Document Number 82237
Rev. 1, 16-Jun-03
VISHAY
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
E
e
Optical Test Signal
(IR diode TSAL6200, I
F
= 0.4 A, 30 pulses, f = f
0
, T = 10 ms)
TSOP348..RF1
Vishay Semiconductors
T
on
,T
off
– Output Pulse Width ( ms )
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.1
1.0
l
= 950 nm,
optical test signal, fig.3
Toff
Ton
t
t
pi
*
T
* t
pi
w
10/fo is recommended for optimal function
V
O
V
OH
V
OL
t
d1 )
Output Signal
1)
2)
16110
7/f
0
<
t
d
<
15/f
0
t
pi
–5/f
0
<
t
po
<
t
pi
+6/f
0
t
po2 )
t
16909
10.0 100.0 1000.010000.0
E
e
– Irradiance ( mW/m
2
)
Figure 1. Output Function
Figure 4. Output Pulse Diagram
1.0
t
po
– Output Pulse Width ( ms )
1.2
E
e min
/ E
e
– Rel. Responsivity
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.1
1.0
Output Pulse
1.0
0.8
0.6
0.4
0.2
0.0
0.7
f = f
0
"5%
Df
( 3dB ) = f
0
/10
0.9
1.1
1.3
Input Burst Duration
l
= 950 nm,
optical test signal, fig.1
10.0
100.0 1000.010000.0
16925
16908
E
e
– Irradiance ( mW/m
2
)
f/f
0
– Relative Frequency
Figure 2. Pulse Length and Sensitivity in Dark Ambient
Figure 5. Frequency Dependence of Responsivity
E
e
Optical Test Signal
E
e min
– Threshold Irradiance ( mW/m
2
)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.01
Ambient,
l
= 950 nm
Correlation with ambient light sources:
10W/m
2
^1.4klx
(Std.illum.A,T=2855K)
10W/m
2
^8.2klx
(Daylight,T=5900K)
600
ms
T = 60 ms
Output Signal,
( see Fig.4 )
600
ms
t
94 8134
V
O
V
OH
V
OL
T
on
T
off
t
16911
0.10
1.00
10.00
(W/m
2
)
100.00
E – Ambient DC Irradiance
Figure 3. Output Function
Figure 6. Sensitivity in Bright Ambient
Document Number 82237
Rev. 1, 16-Jun-03
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3
TSOP348..RF1
Vishay Semiconductors
VISHAY
E
e min
– Threshold Irradiance ( mW/m
2
)
E
e min
– Threshold Irradiance ( mW/m
2
)
2.0
f = f
o
f = 10 kHz
1.0
0.6
0.5
0.4
0.3
0.2
0.1
0.0
–30 –15
Sensitivity in dark ambient
1.5
f = 1 kHz
0.5
f = 100 Hz
0.0
0.1
1.0
10.0
100.0
1000.0
0
15
30
45
60
75
90
16912
DV
sRMS
– AC Voltage on DC Supply Voltage (mV)
16918
T
amb
– Ambient Temperature ( C )
Figure 7. Sensitivity vs. Supply Voltage Disturbances
Figure 10. Sensitivity vs. Ambient Temperature
E
e min
– Threshold Irradiance ( mW/m
2
)
2.0
f(E) = f
0
1.6
1.2
0.8
0.4
0.0
0.0
0.4
0.8
1.2
1.6
2.0
E – Field Strength of Disturbance ( kV/m )
S (
l
)
rel
– Relative Spectral Sensitivity
1.2
1.0
0.8
0.6
0.4
0.2
0.0
750
850
950
1050
1150
94 8147
16919
l
– Wavelength ( nm )
Figure 8. Sensitivity vs. Electric Field Disturbances
Figure 11. Relative Spectral Sensitivity vs. Wavelength
0.8
0.7
Max. Envelope Duty Cycle
0°
10°
20°
30°
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
20
40
60
80
100
120
96 12223p2
40°
1.0
0.9
0.8
f = 38 kHz, E
e
= 2
mW/m
2
0.7
50°
60°
70°
80°
0.6
0.4 0.2
0
0.2
0.4 0.6
d
rel
- Relative Transmission Distance
16913
Burst Length ( number of cycles / burst )
Figure 9. Max. Envelope Duty Cycle vs. Burstlength
Figure 12. Directivity
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Document Number 82237
Rev. 1, 16-Jun-03
VISHAY
TSOP348..RF1
Vishay Semiconductors
• 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).
1.0
E
e min
– Sensitivity ( mW/m
2
)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
0.1
17185
V
S
– Supply Voltage ( V )
IR Signal
Figure 13. Sensitivity vs. Supply Voltage
IR Signal from fluorescent
lamp with low modulation
Suitable Data Format
The circuit of the TSOP348..RF1 is designed in that
way that unexpected output pulses due to noise or
disturbance signals are avoided. A bandpass filter, 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
TSOP348..RF1 it can still receive the data signal.
However the sensitivity is reduced to that level that no
unexpected pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP348..RF1 are:
• DC light (e.g. from tungsten bulb or sunlight)
16920
0
5
10
Time ( ms )
15
20
Figure 14. IR Signal from Fluorescent Lamp with low Modulation
IR Signal from fluorescent
lamp with high modulation
IR Signal
0
16921
5
10
Time ( ms )
15
20
Figure 15. IR Signal from Fluorescent Lamp with high Modulation
Document Number 82237
Rev. 1, 16-Jun-03
www.vishay.com
5
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