Operating Temperature Range ........................ -40NC to +105NC
Soldering Temperature (reflow) ......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
DD
= 1.8V, T
A
= -40NC to +105NC, T
A
= +25NC, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Lux/
LSB
Lux
15
10
0.5
2
0
100
25
6.25
1.56
0.7
6
1.7
5
T
A
= +25NC
T
A
= -40NC to +105NC
100
0.1
3.6
10
0.3
0.6
%
ms
%
%
%
%
Count
AMBIENT LIGHT RECEIVER CHARACTERISTICS
Maximum Ambient Light Sensitivity
Ambient Light Saturation Level
Gain Error
Light Source Matching
Infrared Transmittance
Ultraviolet Transmittance
Dark Current Level
Green LED 538nm response, T
A
= +25NC
(Note 2)
Fluorescent/incandescent light
850nm vs. 538nm, T
A
= +25NC
363nm vs. 538nm, T
A
= +25NC
100ms conversion time, 0 lux, T
A
= +25NC
14-bit resolution, has 50Hz/60Hz rejection
12-bit resolution
10-bit resolution
8-bit resolution
ADC Conversion Time Accuracy
POWER SUPPLY
Power-Supply Voltage
Quiescent Current
Software Shutdown Current
Power-Up Time
V
DD
Is
I
SHDN
t
ON
V
FA
FA
ms
T
A
= +25NC
T
A
= -40NC to +105NC
Fluorescent light (Note 2)
0.03
65,535
ADC Conversion Time
2
MAX44004
Digital Ambient Light Sensor
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= 1.8V, T
A
= -40NC to +105NC, T
A
= +25NC, unless otherwise noted.) (Note 1)
PARAMETER
Output Low Voltage SDA,
INT
INT
Leakage Current
SDA, SCL, A0 Input Current
I
2
C Input Low Voltage
I
2
C Input High Voltage
I
2
C Input Low Voltage
I
2
C Input High Voltage
Input Capacitance
I
2
C TIMING CHARACTERISTICS
Serial Clock Frequency
Bus Free Time Between STOP and
START
Hold Time (Repeated) START
Condition
Low Period of the SCL Clock
High Period of the SCL Clock
Setup Time for a Repeated START
Data Hold Time
Data Setup Time
SDA Transmitting Fall Time
Setup Time for STOP Condition
Pulse Width of Suppressed Spike
f
SCL
t
BUF
t
HD,STA
t
LOW
t
HIGH
t
SU.STA
t
HD,DAT
t
SU,DAT
t
f
t
SU,STO
t
SP
I
SINK
P
6mA; t
R
and t
F
between 0.3 x V
DD
and 0.7 x V
DD
0.6
0
50
1.3
0.6
1.3
0.6
0.6
0
100
100
0.9
400
kHz
Fs
Fs
Fs
Fs
Fs
Fs
ns
ns
Fs
ns
V
IL_I2C
V
IH_I2C
V
IL_I2C
V
IH_I2C
SDA, SCL
SDA, SCL
A0
A0
SDA, SCL
V
DD
- 0.3
3
1.6
0.3
SYMBOL
V
OL
I
SINK
= 6mA
T
A
= +25NC
CONDITIONS
MIN
TYP
0.06
0.01
0.01
MAX
0.4
1000
1000
0.4
UNITS
V
nA
nA
V
V
V
V
pF
DIGITAL CHARACTERISTICS—SDA, SCL,
INT,
A0
Note 1:
The device is 100% production tested at T
A
= +25NC. Temperature limits are guaranteed by design.
Note 2:
Guaranteed by design, green 538nm LED chosen for production so that the IC responds to 100 lux fluorescent light with
100 lux.
3
MAX44004
Digital Ambient Light Sensor
Typical Operating Characteristics
(V
DD
= 1.8V, T
A
= -40NC to +85NC, unless otherwise noted. All devices are 100% production tested at T
A
= +25NC. Temperature limits
are guaranteed by design.)
SPECTRUM RESPONSE
MAX44004 toc01
LIGHT SENSITIVITY vs. LUX LEVEL
RELATIVE SENSITIVITY (% FROM 0°)
1600
1400
ADC COUNT
1200
1000
800
600
400
200
0
INCANDESCENT
ALSTIM[1:0] = 00
ALSPGA[1:0] = 10
FLUORESCENT
MAX44004 toc02
RADIATION PATTERN
90
80
70
60
50
40
30
20
10
0
ROTATED WITH AXIS BETWEEN
PIN 1/2/3 AND 4/5/6
-90 -70 -50 -30 -10 10 30 50 70 90
-80 -60 -40 -20 0 20 40 60 80
LUMINOSITY ANGLE (°)
MAX44004 toc03
120
100
NORMALIZED OUTPUT
80
60
40
20
0
1800
100
GREEN CHANNEL
RED CHANNEL
CIE CURVE
270 370 470 570 670 770 870 970 1070
WAVE LENGTH (nm)
0 100 200 300 400 500 600 700 800 900 1000
REFERENCE METER READING (LUX)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
vs. TEMPERATURE
MAX44004 toc04
OUTPUT ERROR vs. TEMPERATURE
10
9
8
COUNTS (UNITS)
7
6
5
4
3
2
9
8
SUPPLY CURRENT (µA)
7
6
5
4
3
2
1
0
T
A
= +85°C
T
A
= +105°C
DARKROOM CONDITION
V
DD
= 1.7 V TO 3.6V
T
A
= +25°C
T
A
= -40°C
DARKROOM CONDITION
1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7
SUPPLY VOLTAGE (V)
1
0
-40
-15
10
35
60
85
110
TEMPERATURE (°C)
SUPPLY CURRENT vs. LUX
MAX44004 toc06
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
160
OUTPUT LOW VOLTAGE (V)
140
120
100
80
60
40
20
0
25
SUPPLY CURRENT (µA)
20
15
10
5
0
1
10
100
LUX
1k
10k
THE DATA WAS TAKEN ON
THE INTERRUPT PIN
100k
5
10
SINK CURRENT (mA)
15
20
MAX44004 toc07
30
180
MAX44004 toc05
10
11
4
MAX44004
Digital Ambient Light Sensor
Pin Configuration
TOP VIEW
+
V
DD
GND
A0
1
2
3
6
SDA
SCL
INT
MAX44004
5
4
EP
Pin Description
PIN
1
2
3
4
5
6
—
NAME
V
DD
GND
A0
INT
SCL
SDA
EP
Power Supply
Ground
Address Select
Active-Low Interrupt
I
2
C Clock
I
2
C Data
Exposed Pad. EP is internally connected to GND. EP must be connected to GND.
NXP MCU
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