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2

Analog Technologies

Evaluation Board for ATLS1A103D

ATLS1A103DEV1.0

On the bottom center of the board, there is a switch bank. The

2 potentiometers are located on the left side the switch bank.

When the controller works perfectly, the LED on the bottom

right location will be lit up.

Figure 3. Top Silkscreen

Figure 4. Top Layers without Top Screen Layer

Figure 4 shows the top layers without the silkscreen layer.

Figure 5 below shows the bottom layers, including bottom

copper, bottom solder mask, and multilayer (vias). Please

notice that this is a “see through” image from the top side.

Figures 4 and 5 can be used as a layout reference for designing

a system using the ATLS1A103D in the system. These are the

main points:

1. Connect the power supply return node directly to the

PGND pin of the controller before connecting it to any other

points. For thermal management purpose, the returned node

was not done in this way on the evaluation board.

2. Use as large copper area as possible for the PCB traces of

the solder pads of all the pins so that these copper areas

become heat-sinks and help dissipating the heat generated by

the controller.

Figure 5. Bottom Layers

Figure 6. Mirrored Bottom Layers

Figure 6 shows the mirrored bottom layers which is a directly-

seen image from the bottom side.

The ATLS1A103D laser controller module is located in the

center of the ATLS1A103DEV1.0 Evaluation Board. The

voltages of all its pins can be measured directly by probing the

vias on the left and right side of the module sockets which are

connected directly with pins of the electronic module. Some of

the pins are also connected to the connectors of the 3 terminal

blocks, and/or the soldering pads on the edges of the board.

The names of all these nodes are marked on the board.

Please notice that when the board is working, the 5 diodes on

the top center may get hot, therefore, avoid touching them

with your fingers.