Datasheet

Ambient and Infrared Proximity Sensor
Typical Operating Characteristics (continued)
(V
DD
= 1.8V, T
MIN
– T
MAX
= -40°C to +85°C, unless otherwise noted. All devices are 100% production tested at T
A
= +25°C
.
Temperature limits are guaranteed by design.)
LIGHT SENSITIVITY vs. LUX LEVEL
MAX44000 toc03
REFERENCE METER READING (LUX)
ADC COUNT
900800600 700200 300 400 500100
200
400
600
800
1000
1200
1400
1600
FLUORESCENT
INCANDESCENT
1800
0
0 1000
ALSTIM[1:0] = 00
ALSPGA[1:0] = 10
SUNLIGHT REJECTION
MAX44000 toc03b
SUNLIGHT (LUX)
ADC COUNT
70k60k50k40k30k20k10k
50
100
150
0
0 80k
NO REFLECTOR
PRXTIM, PRXPGA : 0x02 = 1111 xxxx
LED CURRENT: 0x03 = xxxx 1110 for 100mA
WITH NO REFLECTOR, PROX COUNT STAYED
AT 0 AT ALL lux LEVEL
WITH A BLACK GLASS AS REFLECTOR AND
lux LEVEL CHANGED FROM 50 TO 75000 lux
PROX COUNTS DROPPED BY 7% AT MID-ADC RANGE
PROX COUNT DROPPED BY 35% AT QUARTER
ADC RANGE
BLACK GLASS REFLECTOR
RADIATION PATTERN
MAX44000 toc04
LUMINOSITY ANGLE (°)
RELATIVE SENSITIVITY (% FROM 0°)
40 60 80
3010
20-60
-50
-40
-30
-20
-10
0-80
-70
10
20
30
40
50
60
70
80
90
100
0
-90 50 70 90
ROTATED WITH AXIS BETWEEN
PIN 1/2/3 AND 4/5/6
SUPPLY CURRENT vs. SUPPLY VOLTAGE
vs. TEMPERATURE
MAX44000 toc05
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (µA)
3.53.32.9 3.12.1 2.3 2.5 2.71.9
1
2
3
4
5
6
7
8
9
10
0
1.7 3.7
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
T
A
= +105°C
STANDARD AMBIENT MODE
DARKROOM CONDITION
OUTPUT ERROR vs. TEMPERATURE
MAX44000 toc06
TEMPERATURE (°C)
COUNTS (UNITS)
85603510-15
1
2
3
4
5
6
7
8
9
10
11
0
-40 110
STANDARD AMBIENT MODE
DARKROOM CONDITION
V
DD
= 1.7 V TO 3.6V
MAX44000
Maxim Integrated
5