TSOP28..
Vishay Telefunken
Photo Modules for PCM Remote Control Systems
Available types for different carrier frequencies
Type
TSOP2830
TSOP2836
TSOP2838
TSOP2856
fo
30 kHz
36 kHz
38 kHz
56 kHz
Type
TSOP2833
TSOP2837
TSOP2840
fo
33 kHz
36.7 kHz
40 kHz
Description
The TSOP28.. – series are miniaturized receivers for
infrared remote control systems. PIN diode and pre-
amplifier are assembled on lead frame, the epoxy
package is designed as IR filter.
The demodulated output signal can directly be de-
coded by a microprocessor. The main benefit is the
reliable function even in disturbed ambient and the
protection against uncontrolled output pulses.
14 500
Features
D
D
D
D
D
Photo detector and preamplifier in one package
Internal filter for PCM frequency
TTL and CMOS compatibility
Output active low
Improved shielding against electrical field distur-
bance
Special Features
D
Small size package
D
Enhanced immunity against all kinds of distur-
bance light
D
No occurrence of disturbance pulses at the out-
D
Short settling time after power on (<200
m
s)
put
D
Suitable burst length
≥6
cycles/burst
Block Diagram
2
Input
Control
Circuit
30 k
W
1
PIN
AGC
Band
Pass
Demodu-
lator
3
GND
OUT
V
S
14318
Document Number 82058
Rev. 7, 31-Jan-00
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TSOP28..
Vishay Telefunken
Absolute Maximum Ratings
T
amb
= 25
_
C
Parameter
Supply Voltage
Supply Current
Output Voltage
Output Current
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Power Consumption
Soldering Temperature
Test Conditions
(Pin 2)
(Pin 2)
(Pin 1)
(Pin 1)
Symbol
V
S
I
S
V
O
I
O
T
j
T
stg
T
amb
P
tot
T
sd
Value
–0.3...6.0
5
–0.3...6.0
5
100
–25...+85
–25...+85
50
260
Unit
V
mA
V
mA
°
C
°
C
°
C
mW
°
C
(T
amb
85
°
C)
t
10 s, 1 mm from case
x
x
Basic Characteristics
T
amb
= 25
_
C
Parameter
Supply Current (
y
(Pin 2)
)
Supply Voltage (Pin 2)
Transmission Distance
Output Voltage Low (Pin 1)
Irradiance (30 – 40 kHz)
Irradiance (56 kHz)
Irradiance
Directivity
Test Conditions
V
S
= 5 V, E
v
= 0
V
S
= 5 V, E
v
= 40 klx, sunlight
E
v
= 0, test signal see fig.6,
IR diode TSAL6200, I
F
= 300 mA
I
OL
= 0.5 mA,E
e
= 0.7 mW/m
2
,
f = f
o
Pulse width tolerance:
t
pi
– 4/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig.6
Angle of half transmission distance
Symbol
I
SD
I
SH
V
S
d
V
OL
E
e min
E
e min
E
e max
ϕ
1/2
30
±45
0.3
0.4
Min
0.9
4.5
35
250
0.5
0.7
Typ
1.2
1.3
Max
1.5
5.5
Unit
mA
mA
V
m
mV
mW/m
2
mW/m
2
W/m
2
deg
Application Circuit
100
W
*)
2
TSOP28..
TSAL62..
1
4.7
m
F
*)
>10 k
W
optional
+5V
m
C
3
GND
14319
*) recommended to suppress power supply disturbances
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Document Number 82058
Rev. 7, 31-Jan-00
TSOP28..
Vishay Telefunken
Suitable Data Format
The circuit of the TSOP28... 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 ( not
suppressed) and disturbance signal (supressed) are
carrier frequency, burst length and Signal Gap Time
(see diagram below).
The data signal should fullfill the following condition:
•
Carrier frequency should be close to center
frequency of the bandpass (e.g. 38kHz).
•
Burst length should be 6 cycles/burst or longer.
•
After each burst a gap time of at least 10 cycles is
neccessary.
•
The data format should not make a continuous
signal transmission. There must be a Signal Gap Time
(longer than 15ms) at least each 90ms (see Figure A).
Some examples for suitable data format are:
NEC Code (repetitive pulse), NEC Code (repetitive
data), Toshiba Micom Format, Sharp Code, RC5
Code, RECS–80 Code, R–2000 Code.
When a disturbance signal is applied to the TSOP28...
it can still receive the data signal. However the
sensitivity is reduced to that level that no unexpected
pulses will occure.
Some examples for such disturbance signals which
are suppressed by the TSOP28... are:
•
DC light (e.g. from tungsten bulb or sunlight),
•
Continuous signal at 38kHz or at any other
frequency,
•
Signals from fluorescent lamps (see Figure B).
•
Continuous IR signal (e.g. 1ms burst, 2ms pause)
Signal Gap Time
0
10
20
30
40
50
time [ms]
60
70
80
90
100
Figure A: Data Signal (Output of IR Receiver) with a Signal Gap Time of 20ms
Signal Gap Time
0
2
4
6
8
10
time [ms]
12
14
16
18
20
Figure B: Disturbance Signal from Fluorescent Lamp with Signal Gap Time of 7ms
(suppressed by TSOP28..)
Document Number 82058
Rev. 7, 31-Jan-00
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Vishay Telefunken
Typical Characteristics
(T
amb
= 25
_
C unless otherwise specified)
1.0
0.8
E
e min
– Threshold Irradiance (mW/m
2
)
/
e
E – Rel. Responsitivity
100.0
f = f
o
10.0
10 kHz
1 kHz
1.0
0.6
0.4
0.2
0.0
0.7
0.8
0.9
1.0
1.1
1.2
1.3
D
f ( 3 dB ) = f
0
/ 7
f / f
0
– Relative Frequency
f = f
0
"
5%
e
E
min
100 Hz
0.1
0.1
1.0
10.0
100.0
1000.0
94 9102
96 12215
D
V
s RMS –
AC Voltage on DC Supply Voltage (mV)
Figure 1. Frequency Dependence of Responsivity
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.01
0.10
1.00
10.00
100.00
Ambient,
l
= 950 nm
Correlation with ambient light sources
( Disturbance effect ) : 1 0W/m2 1.4 klx
( Stand.illum.A, T = 2855 K ) 8.2 klx
( Daylight, T = 5900 K )
Figure 4. Sensitivity vs. Supply Voltage Disturbances
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
V
S
– Supply Voltage ( V )
Sensitivity in dark ambient
E
e min
– Threshold Irradiance (mW/m
2
)
^
^
14310
E – DC Irradiance (W/m
2
)
14312
Figure 2. Sensitivity in Bright Ambient
E
e
2.0
f ( E ) = f
0
1.6
1.2
0.8
0.4
0.0
0.0
94 8147
E
e min
– Threshold Irradiance (mW/m
2
)
Figure 5. Sensitivity vs. Supply Voltage
Optical Test Signal
E
e min
– Threshold Irradiance ( mW/m
2
)
600
m
s
T
D
*
600
m
s
t
T
rep
=100 ms
* T
rep
–T
D
> 15 ms is recommended for optimal function
V
O
V
OH
0.4
0.8
1.2
1.6
2.0
V
OL
T
on
T
off
Output Signal,
( see Fig.7 )
15808
E – Field Strength of Disturbance ( kV / m )
t
Figure 3. Sensitivity vs. Electric Field Disturbances
Figure 6. Output Function
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Document Number 82058
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TSOP28..
Vishay Telefunken
0.80
T
on
,T – Output Pulse Length (ms)
off
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.4
0.1
16163
T
off
T
on
optical test signal, fig.6
1.0
10.0
100.0 1000.0 10000.0
100000.0
14317
1.7
1.6
Supply current in dark ambient
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
V
S
– Supply Voltage ( V )
E
e
– Irradiance (mW/m
2
)
Figure 7. Output Pulse Diagram
2.0
1.8
I
s
– Supply Current ( mA )
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
–30 –15
14315
I
s
– Supply Current ( mA )
V
s
= 5 V
S (
l
)
rel
– Relative Spectral Sensitivity
Figure 10. Supply Current vs. Supply Voltage
1.2
1.0
0.8
0.6
0.4
0.2
0
750
94 8408
0
15
30
45
60
75
90
850
950
1050
1150
T
amb
– Ambient Temperature (
°C
)
l
– Wavelength ( nm )
Figure 8. Supply Current vs. Ambient Temperature
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
–30 –15
0
15
30
45
60
75
90
Sensitivity in dark ambient
Figure 11. Relative Spectral Sensitivity vs. Wavelength
0°
10°
20°
30°
E
e min
– Threshold Irradiance (mW/m
2
)
40°
1.0
0.9
0.8
0.7
50°
60°
70°
80°
0.6
96 12223p2
96 12221
T
amb
– Ambient Temperature (
°C
)
0.6
0.4
0.2
0
0.2
0.4
d
rel
– Relative Transmission Distance
Figure 9. Sensitivity vs. Ambient Temperature
Figure 12. Directivity
Document Number 82058
Rev. 7, 31-Jan-00
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