aixin opto-electrical technology co.,ltd
AX-1838HS
DATA SHEET
SHEET
DATE
2007-4-19
1
●
DEVICE NUMBER：AX-1838HS
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1.0 1.0 1.0 1.0 1.0 1.0
CONTENTS
Initial Released
APPROVED
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DRAWER
aixin opto-electrical technology co.,ltd
AX-1838HS
INFRARED RECEIVER MODULE
● Description
TheAX-1838HS 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.
? 8ms data pause time codes are acceptable .
● 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(Ta=25℃)
Parameter
Symbol
Ratings
Unit
Vs
2.1-6.5
V
¡
Operating Temperature
Topr
-20~+65
℃
¡
Storage Temperature
Tstg
-40~+85
℃
¡
Soldering Temperature
Tsd
260
℃
Supply Voltage
Notice
4mm from mold body
less than 5 sec
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aixin opto-electrical technology co.,ltd
AX-1838HS
 Electrical And Optical Characteristics(Ta=25℃)
Parameter
Ratings
Symbol
Unit
Condition
Min.
Typ.
Max.
-
5.5
V
mA
No signal input
m
At the ray axis*1
Supply Voltage
Vs
2.1
Supply Current
Icc
¡
¡
1.5
L0
17
¡
¡
Reception Distance
L45
8
¡
¡
B.P.F Center Frequency
fo
¡
38
¡
KHz
Peak Wavelength
p
¡
940
¡
nm
Half Angle

¡
45
¡
deg
High Level Pulse Width
TH
400
¡
800
At the ray axis *1
S
At the ray axis *2
800
S
Low Level Pulse Width
TL
400
¡
High Level Output Voltage
VH
4.5
¡
¡
V
Low Level Output Voltage
VL
¡
¡
0.5
V
*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
Comparator
GND
ABLC
Rev: 1.0Page: 2of 5
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aixin opto-electrical technology co.,ltd
AX-1838HS
Test Method
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
VH
TL
TH
VL
0V
 Application Circuit
47
Infrared
Emitting
Diode
IRM
+5V
Vcc
Out
47uF
>10k
uC
GND
GND
Rev: 1.0 Page: 3 of 5
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aixin opto-electrical technology co.,ltd
AX-1838HS
●Package Dimensions:
6.45
6.60
4.3
22.5¡ 0.5
7.75
4.95
4.50
0.50¡ 0.05
1
2
3
0.4
2.54
1
2
3
OUT
GND
VCC
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.
Rev: 1.0Page: 4 of 5
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aixin opto-electrical technology co.,ltd
AX-1838HS
 Electrical And Optical Curves(Ta=25℃)
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
80
60
40
20
0
850
950
1150 (nm)
1050
-60
-40
0
-20
Angle
Wavelength
Fig.3 Frequency Dependence of Responsivity
1.0
(mA)
2.0
0.8
1.6
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
-30
0
30
60
90 (¡ C)
Ambient Temperature
Relative Frequency
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
Rev: 1.0 Page: 5 of 5
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