MAX44007EDT+T Maxim Integrated Products, MAX44007EDT+T Datasheet - Page 14

• Manufacturer Part Number: MAX44007EDT+T
• Description: Optical Sensors - Industrial Industry's Lowest-Po wer Ambient Light Se
• Manufacturer: Maxim Integrated Products

Specifications of MAX44007EDT+T

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Power Digital Ambient Light Sensor
with Enhanced Sensitivity
Table_9._Recommended_Manual_Mode_Settings_for_Configuration_Register_(0x02)_and_
Threshold_Registers_(0x05,_0x06)
Note: In manual mode, exceeding the lux (max) causes an overload error (exponent = 1111).
To utilize the ultra-low power consumption of the IC in
end applications, an interrupt pin is provided to eliminate
the need for the system to poll the device continuously.
Since every clock and data bit transmitted on I
consume up to 1mA (assuming 1.8kI pullup resistor to
a 1.8V rail), minimizing the number of I
on the data bus can save a lot of power. In addition,
eliminating the need to poll the device frees up process-
ing resources for the master, improving overall system
performance.
The typical sequence of communication with the IC is
as follows:
1) Master reads lux reading from registers 0x03 and
14
LUx_LSB_
0x04.
(MIN)
0.025
0.05
12.8
25.6
0.1
0.2
0.4
0.8
1.6
3.2
6.4
APPLICATION_CONDITIONS
104,448
104,448
104,448
104,448
104,448
13,056
26,112
52,224
(MAx)
1632
3264
6528
LUx_
Typical Operating Sequence
LUx_LSB_
(MAx)
102.4
204.8
409.6
409.6
409.6
409.6
409.6
12.8
25.6
51.2
6.4
INTEGRATION_
TIME_(ms)
2
C transactions
12.5
6.25
12.5
6.25
800
400
200
100
800
400
200
100
50
25
50
25
2
C can
RECOMMENDED_SETTINGS_
FOR_CONFIGURATION_
TIM
000
001
010
011
000
100
001
101
010
110
011
111
100
101
110
111
REGISTER_(0x03)
2) Master sets the upper lux threshold and lower lux
3) Master sets suitable threshold timer data in register
4) Master works on other tasks until alerted by the INT
5) When alerted by the INT pin going low, the master
6) Repeat from Step 1.
threshold in registers 0x05 and 0x06 so that a user-
programmed window is defined around the current
lux readings.
0x07.
pin going low. This is where the master spends much
of its time.
reads the Interrupt Status register 0x00 to confirm
the source of interrupt was the IC. The master takes
appropriate action.
CDR
0
0
0
0
1
0
1
0
1
0
1
0
1
1
1
1
UPPER_AND_LOWER_REGISTERS
ExPONENT_
RANGE_OF_ExPONENTS_FOR_
(MIN)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
(0x05_AND_0x06)
ExPONENT_
(MAx)
1000
1001
1010
1011
1100
1101
1110
1110
1110
1110
1110