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IR Receiver Modules for Remote Control Systems
Description
The DS1838 is remote control receiver modules.Pin diode and receiver IC are assembled on one module.Small-sized, light-weight, and low current consumption.modules have been achieved by using resin mold.The demodulated output signal can directly be decodedby a microprocessor. The main benefit is the reliablefunction even in disturbed ambient and the protectionagainst uncontrolled output pulses.
Features
Supply Voltage Range: 2.7V to 5.5 VTTL and CMOS compatibilityPhoto detector and preamplifier in one package.Internal filter for PCM frequencyOutput active lowEnhanced Immunity against all kinds of disturbance lightNo occurrence of disturbance pulses at output pin with in nominal conditions.Short settling time after power On.Meet RoHS
Applications
Audio video applicationsHome appliancesToy applicationsRemote control equipment
Application Circuit
Dimensions
R-C filter recommended to suppress power supR-C filter should be connected closely between
VCC
GND
VOUT
47
47
IC
DS1838
Block Diagram
OUTInput BPF
AGCControl
Wave-form
Detector&
ATC
AGC
GND
PostAmp.
VCC
40
Waveform
Rectifier
PINDiode
Transmitter
IR LED:L5IR5
TAT Elec-tech Co.,Ltd
ply disturbances. VCC pin and GND pin.
VCC
GND
~100Ω
MCU
1/4
Max. Unit
Conditions
5.5 V
60 kHz
80
DS1838
Electro-optical Characteristics
2/4
Specifications hold over the Recommended Operating Conditions, unless otherwise noted herein. All values are at 25 and Vcc=3.0V/5.0V
Recommended Operating Conditions
Parameter Symbol Min. Typ. Max. Unit Conditions
Operating Voltage Vcc V
Input Frequency fin kHz
Operating Temperature Top
(Ta = 25 )
2.7 - 5.5
30 38 60
-20 25 80
Absolute Maximum Ratings (Ta = 25 )
Parameter Symbol Min. Max. Unit Conditions
Supply Voltage Vcc 0 6.0 V
Output Voltage Vout 0 6.0 V
Output Current Iout 0 2.5 mA
Storage Temperature Tst -25 85
Soldering Temperature Tsd 260 ±5 Max 5 sec
Parameter Symbol Conditions Min. Typ. Max. Unit
Supply Voltage Vcc -- 2.7 -- 5.5 V
Working Temperature Topr -- -20 25 80
Current Consumption Icc Input Singnal=0 -- 0.8 1.5 mA
Max Input Current Iin Vin=0V 0.3 -- 0.8 mA
Half Angle θ -- -- ±45 -- deg
B.P.F. Center Frequency Fo -- -- 37.9 -- kHz
Vcc=3V 8 12 -- m Reception Distance d 200±5Lux
Vcc=5V 10 12 -- m
Peak Wavelength λp -- -- 940 -- nm
Singnal Output So -- --Active Low--
High Level Output Voltage Voh -- 4.5 5.0 -- V
Low Level Output Voltage Vol -- -- 0.2 0.4 V
High Level Pulse Width Twh 500 600 700 μs
Low Level Pulse Width Twl Burst Wave=600μs
500 600 700 μs
DS1838
TAT Elec-tech Co.,Ltd
[ Fig. 1 ] Data Signal diagram
VCC
GND
PDS/Transmitter 10
10
VOUT
10
30
[ Fig.2 ] Transmitter
: Indicates horizontal andvertical directions
Vout
GND
Vcc
osc
Transmitter
[ Measurement condition for arrival distance ]
Ambient light source : Detecting surface illumination shall be irradiate 200±50Luxunder ordinary white fluorescence lamp without high frequency lighting
[ Fig.3 ] Test condition of arrival distance
(Integrator output)
Burst length
Carrier Frequency : 37.9kHz
(Output pulse)
(Input burst waveform)
The minimumBurst length
3/4
DS1838
TAT Elec-tech Co.,Ltd
Electrical/Optical Characteristics
[ Fig.5 ] Sensitivity vs. Supply Voltage[ Fig.4 ] Supply Current vs. Voltage
[ Fig.6 ] Output Pulse Width vs. Distance
BPF fc
0
0.2
0.4
0.6
0.8
1
1.2
0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5
f/fo Relative Frequency
Rela
tive resp
onsi
vity
[ Fig.8 ] BPF Fc Curve
>±2000VMin ±2000VC=100, R=1.5
Human Body Model
>±800VMin ±800VR=100, 1ΩCharged Device Model
>±200VMin ±200VC=200, R=0Ω
Machine Model
ResultsSpecificationConditionsParameter
ESD Test Results
0.0
0.5
1.0
1.5
2.0
2.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5
Supply Voltage(V)
Supply
Curr
ent(
)
0
20
40
60
80
100
2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5Supply Voltage(V)
Relat
ive S
ensit
ivity(
%)
300
400
500
600
700
800
0 4 8 12 16 20 24 28
Transmission Distance(m)
Outp
ut
Puls
e W
idth
()
[ Fig.7 ] Directivity (Horizontal)
100
9080˚
0˚ 20˚
40˚
60˚
060 2080 40
Rela
tive
Radia
nt(
˚)
Relative Sensitivity(%)
V
H
4/4
DS1838
TAT Elec-tech Co.,Ltd