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AN-634
APPLICATION NOTE
One Technology Way • P. O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Te l: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Using the ADN2830 Evaluation Board
by Dongfeng Zhao
Rev. A | Page 1 of 8
INTRODUCTION
This application note describes the electrical evaluation
board Rev. B kit for ADN2830 continuous wave (CW) laser
driver. This application note shows how to configure the
evaluation board to evaluate the ADN2830 electrically.
GENERAL DESCRIPTON
The ADN2830 is a CW laser driver, which provides closed-
loop control of a laser at average optical power over time and
over temperature after factory calibration. When used in
conjunction with a laser, a monitor photo diode (MPD)
current is required to control the average optical power
emanating from the laser.
Because a laser emanates an optical average power when a
bias current passes through the laser diode, an MPD then
generates and sends a current to the ADN2830 for the
optical average power control. In this evaluation board kit, a
current mirror circuit replaces the expensive laser diode to
evaluate the ADN2830 in an electrical configuration.
Each ADN2830 can provide up to 200 mA bias current. The
evaluation board features an option to choose between
sinking and sourcing the bias current. Three LEDs
indicating power supply, degrade, and fail are available. The
required power supply to the evaluation board is 5 V only.
DIGITAL PICTURE OF THE ADN2830 EVALUATION BOARD
03562-001
Figure 1.
