OS-1838B
INFRARED RECEIVER MODULE
Description
The OS-1838B is miniaturized infrared receivers for remote
control and other applications requiring improved ambient light
rejection.
The separate PIN diode and preamplifier IC are assembled on
a single leadframe.
The epoxy package contains a special IR filter.
This module has excellent performance even in disturbed
ambient light applications and provides protection against
uncontrolled output pulses.
Features
•
Photo detector and preamplifier in one package .
•
Internal filter for PCM frequency.
•
Inner shield,good anti-interference ability.
•
High immunity against ambient light.
•
Improved shielding against electric field disturbance
•
3.0V or 5.0V supply voltage; low power consumption.
• TTL and CMOS compatibility.
•
Suitable transmission code:NEC code,RC5 code.
Applications:
1. Optical switch
2. Light detecting protion of remote contol
• AV instruments such as Audio,TV,VCR,CD,MD,DVD,etc.
•
Home appliances such as Air-conditioner,Fan,etc.
•
CATV set top boxes
•
Multi-media Equipment
Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Notice
V
2.7-5.5
V
—
Operating Temperature
Topr
- ~+65
—
Storage Temperature
Tstg
-40~+85
—
Soldering Temperature
Ts
260
4mm from mold body
less than 5 sec
Supply Voltage
Distributed by Conrad Electronic SE, Hirschau, Germany
OS-1838B
Electrical And Optical Characteristics
Parameter
Ratings
Symbol
Min.
Typ.
Max.
Unit
Supply Voltage
V
2.7
--
5.5
V
Supply Current
Icc
—
0.35
0.6
mA
L0
18
—
—
L35
12
—
—
B.P.F Center Frequency
fo
—
38
—
KHz
Peak Wavelength
λp
—
940
—
nm
Half Angle
+
θ-
—
35
—
deg
High Level Pulse Width
TH
450
600
750
µS
Low Level Pulse Width
TL
450
600
750
µS
High Level Output Voltage
VH
4.5
—
—
V
Low Level Output Voltage
VL
—
—
0.5
V
Reception Distance
m
ondition
the ray axis 1
the ray axis 1
the ray axis 2
1:The ray receiving surface at a vertex and relation to the ray axis in the range of θ=0° and
θ=45°
2:A range from 30cm to the arrival distance. Average value of 50 pulses
BLOCK DIAGRAM
Vcc
Preamp
Amp
Vout
Limiter
B.P.F
Demodulator
Integrator
PD
ABLC
Comparator
GND
Distributed by Conrad Electronic SE, Hirschau, Germany
Test Method
OS-1838B
B.Detection Length Test
A.Standard Transmitter
Transmitter Output
Vcc
600us
Standard
Transmitter
600us
D.U.T
GND
Vout
Vout
20cm
>10k
Oscilloscope
5.0± 0.1V
+ 10uF
Standard
Transmitter
100k
Vout
Oscilloscope
C.Pulse Width Test
Transmitter Output
600us
600us
D.U.T Output Pulse
TL
VH
TH
VL
0V
Application Circuit
47
Infrared
Emitting
Diode
IRM
Vcc
Out
GND
47uF
+5V
>10k
uC
GND
Distributed by Conrad Electronic SE, Hirschau, Germany
Package Dimensions:
OS-1838B
NOTES:
1.All dimensions are in millimeters (inches).
2.Tolerance is ±0.30mm (0.012’’) unless otherwise specified.
3.Specifications are subject to change without notice.
Distributed by Conrad Electronic SE, Hirschau, Germany
Electrical And Optical Curves(Ta=25
OS-1838B
)
Fig.2 Relative Transmission Distance Vs.
Direction
Fig.1 Relative Spectral Sensitivity vs.
Wavelength
(%)
1.2
Relative Transmission Distance (%)
100
Relative Responsitibity
1.0
0.8
0.6
0.4
0.2
0
750
850
950
60
40
20
0
1150 (nm)
1050
80
-60
-40
-20
Angle
Wavelength
Fig.3 Frequency Dependence of Responsivity
1.0
(mA)
2.0
0.8
1.6
0
20
40
60
80
(deg)
Fig.4 Supply Current vs.
Ambient Temperature
1.4
Supply Current
Rel. Responsitivity
1.8
0.6
0.4
0.2
1.0
0.8
0.6
0.4
0
0
0.0
0.7
1.2
0.2
0.0
0.8
0.9
1.0
1.1
1.2
1.3
Relative Frequency
-30
0
30
60
90 (° C)
Ambient Temperature
Fig.5 Relative Transmission Distance vs.
Direction
0
10
20
30
1.0
40
0.9
50
0.8
60
70
0.7
80
90
0.5
0.3
0.1
0.2
0.4
0.6
Relative Transmission Distance
Distributed by Conrad Electronic SE, Hirschau, Germany