ISL29028A_14 Datasheet, PDF (12/16 Pages) Intersil Corporation – Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes

ISL29028A
Typical Performance Curves V_DD = 3.0V, R_EXT = 499kΩ
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
350
FLUORESCENT
HALOGEN
INCAND.
SUN
550
750
950
WAVELENGTH (nm)
1.0
0.9
0.8 _ALS
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
300 400
HUMAN EYE
IR/PROX
500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 6. SPECTRUM OF FOUR LIGHT SOURCES NORMALIZED
BY LUMINOUS INTENSITY (LUX)
FIGURE 7. ISL29028A SENSITIVITY TO DIFFERENT
WAVELENGTHS
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
-90
-60
-30
0
30
60
90
ANGULAR OFFSET (°)
FIGURE 8. ANGULAR SENSITIVITY
300
18% GREY CARD
250
220mA MODE
200
110mA MODE
150
100
WHITE COPY PAPER
50
0
0 20 40 60 80 100 120 140 160 180 200
DISTANCE (mm)
FIGURE 10. PROX COUNTS vs DISTANCE WITH 10CM x 10CM
REFLECTOR (USING ISL29028 EVALUATION BOARD)
2500
2000
HALOGEN
1500
1000
500
FLUORESCENT
INCANDESCENT
0
0
1000
2000
3000
4000
5000
ALS CODE (12-BIT)
FIGURE 9. ALS LINEARITY OVER 3 LIGHT SOURCES (2000 LUX
RANGE)
160
ALS+PROX (DURING PROX SLEEP)
140
ALS-ONLY
120
100
80
60
PROX (DURING PROX SLEEP)
40
2.25 2.40 2.55 2.70 2.85 3.00 3.15 3.30 3.45 3.60
INPUT V_DD (V)
FIGURE 11. V_DD vs I_DD FOR VARIOUS MODES OF OPERATION
12
FN7721.3
January 29, 2014