HS0038A2

0
5
10 time [ms]
15
20
Figure A: IR Signal from Fluorescent Lamp with low Modulation
0
5
10 time [s]
15
20
Figure B: IR Signal from Fluorescent Lamp with high Modulation
Input burst duration
Ee min – Threshold Irradiance ( mW/m2 )
10 kHz 1
l = 950 nm, optical test signal, fig.7
100 Hz
1.0
10.0
100.0 1000.0 10000.0 mW/m2 )
94 9106
D Suitable burst length ≥10 cycles/burst
Block Diagram
2 Input Control Circuit 30 kW 3 PIN AGC Band Pass Demodulator 1 GND OUT VS
16108
Document Number 82110 Rev. 3, 10-Mar-00
0.35
250 0.5
Application Circuit
100 W *) +5 V **) >10 kW optional
TSAL62..
3
1
16215
*) recommended to suppress power supply disturbances **) tolerated supply voltage range : 4.5 V<VS <5.5V
1.0 0.9 tpo – Output Pulse Length (ms) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.1
96 12110
Figure 4. Sensitivity vs. Electric Field Disturbances
10 f = f0 1 kHz
(Tamb 85 °C) t 10 s, 1 mm from case
x
x
Basic Characteristics
Tamb = 25_C Parameter Supply Current ( y (Pin 2) ) Test Conditions VS = 5 V, Ev = 0 VS = 5 V, Ev = 40 klx, sunlight Transmission Distance Ev = 0, test signal see fig.7, IR diode TSAL6200, IF = 400 mA Output Voltage Low (Pin 3) IOSL = 0.5 mA,Ee = 0.7 mW/m2, f = fo Irradiance (38 kHz) Pulse width tolerance: tpi – 5/fo < tpo < tpi + 6/fo, test signal see fig.7 Irradiance tpi – 5/fo < tpo < tpi + 6/fo Directivity Angle of half transmission distance Symbol ISD ISH d VOSL Ee min Ee max 1/2 30 ±45 Min 0.8 Typ 1.1 1.4 35 Max 1.5 Unit mA mA m mV mW/m2 W/m2 deg
Df ( 3 dB ) = f0 / 10
f = f0
"5%
eE min
0.0
94 8147
0.4
0.8
1.2
1.6
2.0
E – Field Strength of Disturbance ( kV / m )
Figure 1. Frequency Dependence of Responsivity
The circuit of the HS0038A2. 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 and disturbance signal are carrier frequency, burst length and duty cycle. The data signal should fullfill the following condition: Carrier frequency should be close to 38kHz. Burst length should be 10 cycles/burst or longer. After each burst which is between 10 cycles and 70 cycles a gap time of at least 14 cycles is neccessary. For each burst which is longer than 1.8ms a corresponding gap time is necessary at some time in the data stream. This gap time should be at least 4 times longer than the burst. Up to 800 short bursts per second can be received continuously. Some examples for suitable data format are: NEC Code (repetitive pulse), NEC Code (repetitive data), Toshiba Micom Format, Sharp Code When a disturbance signal is applied to the HS0038A2. 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 HS0038A2. are: DC light (e.g. from tungsten bulb or sunlight) Continuous signal at 38kHz or at any other frequency Signals from fluorescent lamps with electronic ballast with low modulation (see Figure A or B).
Document Number 82110 Rev. 3, 10-Mar-00
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HS0038A2.
Vishay Telefunken Typical Characteristics (Tamb = 25_C unless otherwise specified)
0.1 0.01
0.1
1
10
100
1000
Ee – Irradiance (
DVs RMS – AC Voltage on DC Supply Voltage ( mV )
Figure 2. Sensitivity in Dark Ambient
5.0 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 ) : 10W/m2 1.4 klx ( Stand.illum.A, T = 2855 K ) 8.2 klx ( Daylight, T = 5900 K )
HS0038A2.
Vishay Telefunken
Photo Modules for PCM Remote Control Systems
Description
The HS0038A2. – 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 decoded by a microprocessor. HS0038A2. is the standard IR remote control receiver series, supporting all major transmission codes.
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