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2

LDD P SERIES LASER DIODE DRIVER

QUICK CONNECT GUIDE

!

To ensure safe operation of the LDD P

driver, it is imperative that you determine

that the unit will be operating within the

internal heat dissipation Safe Operating Area

(SOA).

QUICK CONNECT DIAGRAM FOR LDD 1P MODELS

CURRENT

FEEDBACK

CURRENT

MONITOR

MODULATION

INPUT

GND

1

2

3

4

V+

5

6

7

8

FEEDBACK

IN

LD

ANODE

OUTPUT ADJUST

LIMIT ADJUST

LD

CATHODE

V+

- +

Voltmeter

2.500 V

Signal

Generator

Laser

Diode

*

* Trimpots shown for proper orientation

LDD 1P

LASER DIODE DRIVER

Type A Laser Diode

Type B Laser Diode

Type C Laser Diode

Common

Cathode

Laser Diode Anode &

Photodiode Cathode Common

Isolated Photodiode

Short

Laser Diode Anode

to Photodiode Cathode

Common

Anode

Laser Diode Cathode &

Photodiode Anode Common

Figure 1. External connections for LDD 1P. Supports Type A and Type B laser diodes.

Visit the Wavelength Electronics website for the most

accurate, up-to-date, and easy to use SOA calculator:

www.teamwavelength.com/support/design-tools/soa-ld-calculator/

RECOMMENDED TEST LOAD

– 1P MODELS

Wavelength recommends using a test load in place of a

diode laser until the user is familiar with the operation and

control of the LDD P Series Laser Diode Driver.

For 1P models, the recommended test load is shown in

Figure 2. This load is used to simulate Type A and Type B

lasers.

LD Anode

(Pin 6)

LD Cathode

(Pin 5)

Silicon Diode

(1N4001)

x2

1Ω, 0.25 W

Resistor

Figure 2. Recommended test load for the LDD 1P Laser

Diode Driver.