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5

Analog Technologies

Evaluation Board for ATLS201D

ATLS201DEV1.0

voltage reference from the driver can be used as the

voltage reference for the ADCs and DACs.

13. Connecting a real laser diode to the evaluation board.

After making sure that the driver works properly after

going through the steps above, a real laser diode can be

connected to the evaluation board. This is the procedure:

A. Solder the laser diode terminal wires to the LDA and

LDC solder pads, or use the LDA and LDC

conductors on the terminal block TB3 and lock the

wires by using the screws. Make sure that the

connections are tight and secure, no intermittent

disconnection will occur. Set the output forward

voltage to 1.4V by switching S3, S4, S5 and S6 to the

upper on position. Turn on the power supply, and see

if everything works perfectly as described above.

B. Turn off the power, turn the switch S2 to the lower

off position and turn on the power again. After this

moment, be more careful in doing anything on the

board, because any mistake in operating the board or

any intermittent disconnections for connections on

the board may result in damaging the laser diode

permanently.

C. If everything still works fine after step C above, the

user can proceed to testing the laser itself. The output

current and current limit can be adjusted while the

laser is turned on, but make sure that the output

current will never exceed the laser’s current limit.

D. In case there are any suspicious or real problems,

disconnect the real laser and use the dummy laser

instead for debugging.

OTHER VIEW PHOTOS

Figure 8. Side View of Actual ATLS201DEV1.0 (1)

Figure 9. Side View of Actual ATLS201DEV1.0 (2)

Figure 10. Side View of Actual ATLS201DEV1.0 (3)

Figure 11. Side View of Actual ATLS201DEV1.0 (4)