ISL29021_14 Datasheet, PDF (10/12 Pages) Intersil Corporation – Digital Proximity Sensor with Interrupt Function

ISL29021
Typical Performance Curves V_SUP (V_DDD, V_DDA) = 3V, R_EXT = 499kΩ
1.2
1.2
SUN
1.0
INCANDESCENT
1.0
0.8
0.8
HALOGEN
0.6
0.6
0.4
FLUORESCENT
0.4
0.2
0.2
0
IR AND
PROXIMITY
SENSING
0
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 5. SPECTRUM OF FOUR LIGHT SOURCES
-0.2
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 6. SPECTRAL RESPONSE FOR PROXIMITY
SENSING
RADIATION PATTERN
LUMINOSITY
20¬ ^{10¬ 0¬}
30¬
ANGLE _40¬
50¬
10¬ _20¬
30¬
40¬
50¬
60¬
60¬
70¬
70¬
80¬
80¬
90¬
90¬
0.2 0.4 0.6 0.8 1.0
RELATIVE SENSITIVITY
FIGURE 7. RADIATION PATTERN
10000
1000
100
92% BRIGHTNESS PAPER
18% GRAY CARD
10
ESD BLACK FOAM
1
0
20
40
60
80
100
DISTANCE (mm)
FIGURE 8. ADC OUTPUT vs DISTANCE WITH DIFFERENT
OBJECTS IN PROXIMITY SENSING
4500
4000
3500
3000
2500
2000
I_IRLED = 100mA
I_IRLED = 50mA
I_IRLED = 25mA
I_IRLED = 12.5mA
1500
1000
500
0
0 10 20 30 40 50 60 70 80 90
DISTANCE (mm)
FIGURE 9. ADC OUTPUT vs DISTANCE WITH DIFFERENT
LED CURRENT AMPLITUDES IN PROXIMITY
SENSING
10
350
12-BIT ADC
300
PIG'S SKIN
250
RANGE 3
fLED = 328kHz
ILED = 12.5mA
4mm CENTER-TO-CENTER
FOR ISL29021 AND SFH4650,
200
ISOLATED BY BARRIER
AND BEHIND A 65%
150
18% GRAY
IR TRANSMITTING GLASS
130 CTS = 500 CTS x 65% x 65%
100
= 211 CTS
50
BLOND HAIR _{BRUNETTE HAIR}
0
0
10
20
30
40
50
60
DISTANCE (mm)
FIGURE 10. PROXIMITY DETECTIONS OF VARIOUS
BIOLOGICAL OBJECTS
FN6732.0
March 3, 2009