VISHAY
TSOP48..RF1
Vishay Semiconductors
IR Receiver Modules for Remote Control Systems
Description
The TSOP48..RF1 - series are miniaturized receivers
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. TSOP48..RF1 is the
standard IR remote control receiver series, support-
ing all major transmission codes.
16666
Features
• Photo detector and preamplifier in one package
• Internal filter for PCM frequency
• Improved shielding against electrical field distur-
bance
• TTL and CMOS compatibility
• Output active low
• Low power consumption
Parts Table
Part
TSOP4830RF1
TSOP4833RF1
TSOP4836RF1
TSOP4837RF1
TSOP4838RF1
TSOP4840RF1
TSOP4856RF1
30 kHz
33 kHz
36 kHz
36.7 kHz
38 kHz
40 kHz
56 kHz
Carrier Frequency
Special Features
• Improved immunity against ambient light
• Suitable burst length
≥
10 cycles/burst
Application Circuit
Transmitter
TSOPxxxx
with
TSALxxxx
Circuit
Block Diagram
R
1
= 100
Ω
V
S
C
1
=
4.7 µF
V
O
+V
S
3
30 kΩ
Input
PIN
AGC
Band
Pass
Demo-
dulator
V
S
1
OUT
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 =
3.3 V by the external circuit.
Absolute Maximum Ratings
T
amb
= 25 °C, unless otherwise specified
Parameter
Supply Voltage
(Pin 2)
Test condition
Symbol
V
S
Value
- 0.3 to +
6.0
Unit
V
Document Number 82119
Rev. 5, 15-Oct-2002
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TSOP48..RF1
Vishay Semiconductors
Parameter
Supply Current
Output Voltage
Output Current
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Power Consumption
Soldering Temperature
(T
amb
≤
85 °C)
t
≤
5s
(Pin 2)
(Pin 1)
(Pin 1)
Test condition
Symbol
I
S
V
O
I
O
T
j
T
stg
T
amb
P
tot
T
sd
Value
5
VISHAY
Unit
mA
V
mA
°C
°C
°C
mW
°C
- 0.3 to +
6.0
5
100
- 25 to + 85
- 25 to + 85
50
260
Electrical and Optical Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Supply Current (Pin 3)
Transmission Distance
Supply Voltage
Output Voltage Low (Pin 3)
Irradiance (56 kHz)
Irradiance (30-40 kHz)
Irradiance
Directivity
I
OSL
= 0.5 mA, E
e
= 0.7 mW/m
2
,
test signal see fig. 1
Pulse width tolerance: t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
, test signal see fig.1
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
Test condition
V
S
= 5 V, E
v
= 0
V
S
= 5 V, E
v
= 40 klx, sunlight
E
v
= 0, test signal see fig.1, IR
diode TSAL6200, I
F
= 250 mA
Symbol
I
SD
I
SH
d
V
S
V
OSL
E
e min
E
e min
E
e max
ϕ
1/2
30
±
45
0.3
0.2
4.5
Min
0.8
Typ.
1.2
1.5
35
5.5
250
0.5
0.4
Max
1.5
Unit
mA
mA
m
V
mV
mW/m
2
mW/m
2
W/m
2
deg
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)
1.0
t
po
– Output Pulse Width ( ms )
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
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
Input Burst Duration
7/f
0
<
t
d
<
15/f
0
t
pi
–5/f
0
<
t
po
<
t
pi
+6/f
0
t
po2 )
t
l
= 950 nm,
optical test signal, fig.1
10.0
100.0 1000.010000.0
16908
E
e
– Irradiance ( mW/m
2
)
Figure 1. Output Function
Figure 2. Pulse Length and Sensitivity in Dark Ambient
Document Number 82119
Rev. 5, 15-Oct-2002
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2
VISHAY
TSOP48..RF1
Vishay Semiconductors
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
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
E
e min
– Threshold Irradiance ( mW/m
2
)
T
on
,T
off
– Output Pulse Width ( ms )
1.0
2.0
f = f
o
f = 10 kHz
1.0
1.5
f = 1 kHz
0.5
f = 100 Hz
0.0
0.1
1.0
10.0
100.0
1000.0
10.0
100.0 1000.010000.0
mW/m
2
)
16912
16909
E
e
– Irradiance (
DV
sRMS
– AC Voltage on DC Supply Voltage (mV)
Figure 4. Output Pulse Diagram
Figure 7. Sensitivity vs. Supply Voltage Disturbances
E
e min
– Threshold Irradiance ( mW/m
2
)
1.2
E
e min
/ E
e
– Rel. Responsivity
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 )
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
16925
f/f
0
– Relative Frequency
94 8147
Figure 5. Frequency Dependence of Responsivity
Figure 8. Sensitivity vs. Electric Field Disturbances
Document Number 82119
Rev. 5, 15-Oct-2002
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TSOP48..RF1
Vishay Semiconductors
VISHAY
0.8
0.7
Max. Envelope Duty Cycle
0
10
20
30
0.6
40
0.5
0.4
0.3
0.2
0.1
0.0
0
20
40
60
80
100
120
96 12223p2
1.0
0.9
0.8
f = 38 kHz, E
e
= 2
mW/m
2
0.7
50
60
70
80
0.6
0.6
0.4
0.2
0
0.2
0.4
d
rel
– Relative Transmission Distance
16913
Burst Length ( number of cycles / burst )
Figure 9. Max. Envelope Duty Cycle vs. Burstlength
Figure 12. Directivity
Suitable Data Format
E
e min
– Threshold Irradiance ( mW/m
2
)
0.6
0.5
0.4
0.3
0.2
0.1
0.0
–30 –15
Sensitivity in dark ambient
0
15
30
45
60
75
90
16918
T
amb
– Ambient Temperature ( C )
Figure 10. Sensitivity vs. Ambient Temperature
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
16919
l
– Wavelength ( nm )
Figure 11. Relative Spectral Sensitivity vs. Wavelength
The circuit of the TSOP48..RF1 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
TSOP48..RF1 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 TSOP48..RF1 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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Document Number 82119
Rev. 5, 15-Oct-2002
VISHAY
• Signals from fluorescent lamps with electronic bal-
last with high or low modulation ( see Figure 13 or Fig-
ure 14 ).
TSOP48..RF1
Vishay Semiconductors
IR Signal
IR Signal from fluorescent
lamp with low modulation
0
16920
5
10
Time ( ms )
15
20
Figure 13. 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 14. IR Signal from Fluorescent Lamp with high Modulation
Document Number 82119
Rev. 5, 15-Oct-2002
www.vishay.com
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