MAX44000
Ambient and Infrared Proximity Sensor
Ambient ADC Conversion Time (ALSTIM)
The 2-bit ALSTIM[1:0] sets the integration time for ALS ADC conversion, as shown in Table 1.
Table 1. Ambient ADC Conversion Time
ALSTIM[1:0]
00
01
10
11
INTEGRATION TIME (ms)
100
25
6.25
1.5625
FULL-SCALE ADC
COUNTS
16,384
4096
1024
256
BIT RESOLUTION
14
12
10
8
RELATIVE LSB SIZE
1x
4x
16x
64x
Ambient Light Measurement Gain (ALSPGA)
The 2-bit ALSPGA[1:0] sets the gain of the ambient light sensing measurement according to Table 2.
Table 2. Ambient Light Measurement Gain
ALSPGA[1:0]
00
01
10
11
LUX/LSB
0.03125
0.125
0.5
4
RELATIVE LSB SIZE
1x
4x
16x
128x
Transmit Configuration Register (0x03)
This register controls the driver current setting and is used when the Proximity channel is enabled.
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
REGISTER
ADDRESS
POWER-ON
RESET
STATE
R/W
Transmit Configuration
DRV[3:0]
0x03
0x00
R/W
LED Drive Current Setting (DRV)
The 4 bits of DRV set the LED drive current according to Table 3.
Table 3. LED Drive Current Settings
DRV[3:0]
0000
0001
0010
0011
0100
0101
0110
0111
Maxim Integrated
LED CURRENT (mA)
LED driver disabled
10
20
30
40
50
60
70
DRV[3:0]
1000
1001
1010
1011
1100
1101
1110
1111
LED CURRENT (mA)
40
50
60
70
80
90
100
110
13
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