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TSOP28..UH1
Vishay Telefunken
Photo Modules for PCM Remote Control Systems
Available types for different carrier frequencies
Type
TSOP2830UH1
TSOP2836UH1
TSOP2838UH1
TSOP2856UH1
fo
30 kHz
36 kHz
38 kHz
56 kHz
Type
TSOP2833UH1
TSOP2837UH1
TSOP2840UH1
fo
33 kHz
36.7 kHz
40 kHz
Description
The TSOP28..UH1 – 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 de-
coded by a microprocessor. The main benefit is the
reliable function even in disturbed ambient and the
protection against uncontrolled output pulses.
16 081
Features
D Photo detector and preamplifier in one package
D Internal filter for PCM frequency
D TTL and CMOS compatibility
D Output active low
D Improved shielding against electrical field distur-
bance
D Suitable burst length 6 cycles/burst
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-
put
mD Short settling time after power on (<200 s)
Block Diagram
Input
PIN
AGC
Control
Circuit
Band
Pass
30 kW
Demodu-
lator
2
VS
1
OUT
3
GND
14318
Document Number 82063
Rev. 3, 13-Jun-00
www.vishay.de FaxBack +1-408-970-5600
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TSOP28..UH1
Vishay Telefunken
Absolute Maximum Ratings
Tamb = 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)
x(Tamb 85 °C)
xt 10 s, 1 mm from case
Symbol
VS
IS
VO
IO
Tj
Tstg
Tamb
Ptot
Tsd
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
Basic Characteristics
Tamb = 25_C
Parameter
Supply Current (Pin 2)
Supply Voltage (Pin 2)
Supply Voltage (Pin 2)
Transmission Distance
Output Voltage Low (Pin 1)
Irradiance (30 – 40 kHz)
Irradiance (56 kHz)
Irradiance
Directivity
Test Conditions
Symbol Min Typ Max Unit
VS = 5 V, Ev = 0
VS = 5 V, Ev = 40 klx, sunlight
Ev = 0, test signal see fig.6,
IR diode TSAL6200, IF = 300 mA
IOL = 0.5 mA,Ee = 0.7 mW/m2,
f = fo
Pulse width tolerance:
tpi – 4/fo < tpo < tpi + 6/fo,
test signal see fig.6
ISD 0.9 1.2 1.5 mA
ISH 1.2 mA
VS 4.5
5.5 V
VS 4.5
5.5 V
d 35 m
VOL
Ee min
Ee min
250 mV
0.3 0.5 mW/m2
0.4 0.7 mW/m2
Ee max 30
Angle of half transmission distance ϕ1/2
±45
W/m2
deg
Application Circuit
100 W *)
TSAL62..
mTSOP28.. 2 4.7 F *)
1
>10 kW
optional
mC
+5V
3
GND
14319 *) recommended to suppress power supply disturbances
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Document Number 82063
Rev. 3, 13-Jun-00

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TSOP28..UH1
Vishay Telefunken
Suitable Data Format
The circuit of the TSOP28..UH1 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..UH1 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..UH1 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 60 70 80 90 100
time [ms]
Figure A: Data Signal (Output of IR Receiver) with a Signal Gap Time of 20ms
Signal Gap Time
0 2 4 6 8 10 12 14 16 18 20
time [ms]
Figure B: Disturbance Signal from Fluorescent Lamp with Signal Gap Time of 7ms (suppressed by TSOP28..)
Document Number 82063
Rev. 3, 13-Jun-00
www.vishay.de FaxBack +1-408-970-5600
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