MLX75030 Datasheet, PDF (45/72 Pages) Melexis Microelectronic Systems – Universal ActiveLight Sensor Interface

MLX75030 Universal ActiveLight Sensor Interface
Datasheet
BW_SEL_LP_A<1:0>: cut-off frequency selection of low-pass filter of channel A
BW_SEL_
LP_A1
0
BW_SEL_
LP_A0
0
Cut-off Frequency
(%f₀)
≅23.5
Cut-off Frequency
(kHz @ f₀=70kHz)
≅16.5
0
1
≅12
≅7.8
1
0
≅5.9
≅4.2
1
1
≅3
≅2.1
7.4.4. SetBH register
This register defines the DAC level for IR channel B.
SetBH
0x3
Bit
Read/Writ
e
Init
7
DACB7
R/W
0
6
DACB6
R/W
0
5
DACB5
R/W
0
4
DACB4
R/W
0
3
DACB3
R/W
0
2
DACB2
R/W
0
1
DACB1
R/W
0
0
DACB0
R/W
0
DACB<7:0>: the 8 bits of the DAC level for IR channel B
7.4.5. SetBL register
This register defines the gain and cut-off frequency adjustments for IR channel B.
SetBL
0x4
Bit
Read/Writ
e
Init
7
GAIN_A
DJ_
AA_B2
6
GAIN_A
DJ_
AA_B1
5
GAIN_A
DJ_
AA_B0
R/W R/W R/W
0
0
0
4
BW_
ADJ_
AA_B2
R/W
0
3
BW_
ADJ_
AA_B1
R/W
1
2
BW_
ADJ_
AA_B0
R/W
1
1
BW_
SEL_
LP_B1
R/W
0
0
BW_
SEL_
LP_B0
R/W
1
GAIN_ADJ_AA_B<2:0>: gain adjustment of anti-aliasing filter of channel B
GAIN_ADJ_ GAIN_ADJ_ GAIN_ADJ_
AA_B2
AA_B1
AA_B0
Gain
Gain (dB)
0
0
0
2.00
6.02
0
0
1
4.29
12.64
0
1
0
6.57
16.35
0
1
1
8.86
18.95
1
0
0
11.14
20.94
1
0
1
13.43
22.56
1
1
0
15.71
23.93
1
1
1
18.00
25.11
BW_ADJ_AA_B<2:0>: cut-off frequency adjustment of anti-aliasing filter of channel B
REVISION 005 – DECEMBER 2013
3901075030
PAGE 45 OF 72