Datasheet

Industry’s Lowest-Power
Ambient Light Sensor with ADC
Typical Operating Characteristics
(V
CC
= 1.8V, default power-up setting, unless otherwise noted.)
SPECTRUM RESPONSE
MAX44009 toc01
WAVELENGTH (nm)
CIE
NORMALIZED RESPONSE
900800700600500400
20
40
60
80
100
120
0
300 1000
MAX44009 RESPONSE
RADIATION PATTERN
MAX44009 toc02
LUMINOSITY ANGLE (°)
RELATIVE SENSITIVITY (% FROM 0°)
60300-30-60
10
20
30
40
50
60
70
80
90
100
0
-90 90
AUTO MODE,
INCANDESCENT LAMP
SPECTRUM OF LIGHT SOURCES
FOR MEASUREMENT
MAX44009 toc03
WAVELENGTH (nm)
NORMALIZED RESPONSE
900800400 500 600 700
20
40
60
80
100
120
140
160
0
300 1000
INCANDESCENT
SUNLIGHT
FLUORESCENT
SUPPLY CURRENT vs. SUPPLY VOLTAGE
MAX44009 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
3.33.02.72.42.11.8
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0
1.5 3.6
0 LUX AND 100 LUX, CONT = 1
5000 LUX, CONT = 0
100 LUX, CONT = 0
AUTO MODE,
FLUORESCENT LAMP
OUTPUT CODE ERROR vs. SUPPLY VOLTAGE
MAX44009 toc05
SUPPLY VOLTAGE (V)
OUTPUT CODE ERROR (RATIO FROM 1.8V)
3.33.02.4 2.72.11.8
0.92
0.94
0.96
0.98
1.00
1.02
1.04
1.06
1.08
1.10
0.90
1.5 3.6
50 LUX AND 300 LUX
AUTO MODE,
FLUORESCENT LAMP
SUPPLY CURRENT vs. TEMPERATURE
MAX44009 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
603510-15
0.2
0.4
0.6
0.8
1.0
1.2
0
-40 85
100 LUX
AUTO MODE,
FLUORESCENT LAMP
V
CC
= 1.8V
V
CC
= 2.5V
V
CC
= 3.3V
4
Maxim Integrated
MAX44009