Rainbow Electronics MAX44000 - Manual (Page 13)

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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
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
Transmit Configuration Register (0x03)
This register controls the driver current setting and is used when the Proximity channel is enabled.
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
ALSTIM[1:0] INTEGRATION TIME (ms)
FULL-SCALE ADC
COUNTS
BIT RESOLUTION RELATIVE LSB SIZE
00 100 16,384 14 1x
01 25 4096 12 4x
10 6.25 1024 10 16x
11 1.5625 256 8 64x
ALSPGA[1:0] LUX/LSB RELATIVE LSB SIZE
00 0.03125 1x
01 0.125 4x
10 0.5 16x
11 4 128x
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
DRV[3:0] LED CURRENT (mA) DRV[3:0] LED CURRENT (mA)
0000 LED driver disabled 1000 40
0001 10 1001 50
0010 20 1010 60
0011 30 1011 70
0100 40 1100 80
0101 50 1101 90
0110 60 1110 100
0111 70 1111 110