Analog Technologies
FEATURES Ultra Low Noise: 0.05V if possible. It is recommended not to set this pin’s voltage to 0V because the output voltage may oscillate due to the junction voltage of the laser diode. This pin is a filtered and divided (by 5) output voltage of LISL. When LISL has a voltage of 2.5V, the P5VL voltage is 2.5V/5 = 0.5V. The output impedance of this pin is about 200K. This pin sets the output current directly. When its voltage is 0.5V, the output current is 1A. Shut down control, negative logic, 0 = shut down; 1 = turn on. SND >1.4V = enable, 2V, the Never leave this pin unconnected. It is highly recommended to use this pin for turning on the laser after the power supply is up and turning off the laser before the power supply is shut down. This pin can be used to drive Note Do not connect the power supply ground to here.
3
LILM
4
LISL
Analog input
Never leave unconnected.
this
pin
5
P5VL
Analog output Analog input
6
LISH
7
SDN
Digital input
8
LPGD
Digital
5 50 E. Weddell Drive, Suit e 4, Sunnyvale, CA 94 08 9, U. S. A. Tel.: (4 08 ) 7 47 -9 76 0, Fax: (40 8) 74 7-97 70 , W eb: w w w .analogt echnologies.com
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4
Analog Technologies
output 9 10 11 12 LDA LDC PGND VPS Power output Analog output Power ground Power input
Low Noise Constant Current Laser Driver ATLS1A101
an LED directly, without using any additional components.
control loop is working properly. When this pin is low,
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