ISL29043_14 Datasheet, PDF (13/16 Pages) Intersil Corporation – Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output

ISL29043
R1
10kΩ
R2
R3
10kΩ 10kΩ
V_I2C PULL-UP
V_DD
V_LED
SLAVE_0
1 _LED+
C1
1.0µF ₂
ADDR0
LED- ¹⁰
9
IRDR
C2
C3
1µF
0.1µF
3
V_DD
4 _GND
5
REXT
8
INT
7
SDA
6
SCL
REXT ISL29043
499kΩ
SLAVE_1
SDA
SCL
I²C SLAVE_n
SDA
SCL
FIGURE 9. ISL29043 TYPICAL CIRCUIT
I²C MASTER
MICROCONTROLLER
INT
SDA
SCL
Typical Performance Curves V_DD = 3.0V, R_EXT = 499kΩ.
1.0
0.9
FLUORESCENT
0.8
0.7
0.6
0.5
HALOGEN _INCAND.
0.4
SUN
0.3
0.2
0.1
0
350
550
750
950
WAVELENGTH (nm)
FIGURE 10. SPECTRUM OF FOUR LIGHT SOURCES NORMALIZED BY
LUMINOUS INTENSITY (LUX)
1.0
0.9
0.8 _ALS
0.7
HUMAN EYE
IR/PROX
0.6
0.5
0.4
0.3
0.2
0.1
0.0
300 400 500 600 700 800 900 1000 1100
WAVELENGTH (nm)
FIGURE 11. ISL29043 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
ANGLE (°)
60
90
FIGURE 12. ANGULAR SENSITIVITY
13
4500
4000
3500
3000
HALOGEN INCANDESCENT
2500
FLUORESCENT
2000
1500
1000
500
0
0
500
1000
1500
2000
LUX METER READING (lx)
FIGURE 13. ALS LINEARITY OVER 2 LIGHT SOURCES (2000 LUX
RANGE)
FN7935.0
February 9, 2012