ISL29011_11 Datasheet, PDF (13/16 Pages) Intersil Corporation – Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function

ISL29011
Typical Performance Curves V_SUP (V_DDD, V_DDA) = 3V, R_EXT = 499kΩ
1.2
SUN
1.0
INCANDESCENT
1.2
AMBIENT
1.0
LIGHT
SENSING
0.8
0.8
HALOGEN
0.6
0.6
0.4
FLUORESCENT
0.4
0.2
0.2
0
HUMAN EYE RESPONSE
IR AND
PROXIMITY
SENSING
0
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 6. SPECTRUM OF FOUR LIGHT SOURCES
-0.2
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 7. SPECTRAL RESPONSE FOR AMBIENT LIGHT
SENSING AND 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 8. RADIATION PATTERN
1000
900
800
V_DD = 3V
RANGE = 1000 LUX
16-BIT ADC
INCANDESCENT
65535
700
HALOGEN
600
500
32768
400
FLUORESCENT
300
200
100
0
0
1000 LUX
E_cal = ₂₁₆ x DATA
0
100 200 300 400 500 600 700 800 900 1000
LUX METER READING (LUX)
FIGURE 9. SENSITIVITY TO THREE LIGHT SOURCES
10000
1000
100
92% BRIGHTNESS PAPER
18% GRAY CARD
10
ESD BLACK FOAM
1
0
20
40
60
80
100
DISTANCE (mm)
FIGURE 10. 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 11. ADC OUTPUT vs DISTANCE WITH DIFFERENT
LED CURRENT AMPLITUDES IN PROXIMITY
SENSING
13
FN6467.4
May 5, 2011