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2
Analog Technologies
ATLS1A101
Low Noise Constant Current Laser Driver
power supply 0V
D2
Green LED
2
W1
100K
(Clock-wise)
Power Supply 5V
S1
SPST
LISH
6
VPS
12
LDC
10
SDN
7
LDA
9
2P5VR
2
P5V
5
PGND
11
LPGD
8
LILM
3
LISL
4
AGND
1
U1
ATLS1A101
D1
Laser Diode
Voltmeter
Shut Down
Loop Good
Indication
(Optional)
(Optional)
Figure 2 A Typical Stand-alone Application Schematic
power supply 0V
Power Supply 5V
LISH
6
VPS
12
LDC
10
SDN
7
LDA
9
2P5VR
2
P5V
5
PGND
11
LPGD
8
LILM
3
LISL
4
AGND
1
U1
ATLS1A101
D1
Laser Diode
ADC
MC
MC
DAC
Figure 3 A Typical Micro-processor-based Application Schematic
LISH
6
VPS
12
LDC
10
SDN
7
LDA
9
2P5V
2
P5V
5
PGND
11
LPGD
8
LILM
3
LISL
4
AGND
1
Infinite
1.5M
200K
Infinite
<60
0.5
2K
49.9K
Infinite (AC)
0.3 (AC)
ATLS1A101
Figure 4 Equivalent Internal Circuits
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