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6

PLD SERIES LASER DIODE DRIVER

ELECTRICAL SPECIFICATIONS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

NOTE

ABSOLUTE MAXIMUM RATINGS

Supply Voltage

+5 V

5.0 to 5.5

VDC

Supply Voltage,

LDA High Compliance

LD Anode

3.0 to 30

VDC

Consult Safe Operating Area

calculator for supply voltages

> 5 VDC; see

page 18.

Supply Voltage, Type C Lasers

Aux V+

8.0 to 12.5

VDC

Operating Temperature Range

T

OPR

0 to 50

ºC

Storage Temperature Range

T

STG

-55 to 125

ºC

Weight

< 0.3

lbs

Size

PLD200

PLD500

PLD1250, PLD5000, PLD6500

1.52 x 2.65 x 0.81

1.52 x 2.65 x 1.10

1.52 x 2.65 x 1.82

in

38.6 mm x 67.3 mm x 20.6 mm

38.6 mm x 67.3 mm x 27.9 mm

38.6 mm x 67.3 mm x 46.3 mm

MODEL

PARAMETER

PLD200

PLD500

PLD1250

PLD5000

PLD6500

UNIT

DRIVE CURRENT OUTPUT

Max Internal power Dissipation

3

9

45

45

45

W

Max Output Current

0.2

0.5

1.25

A

Compliance Voltage

3 V max with 5 VDC power supply voltage

28 V max with 30 VDC power supply voltage

V

Short Term Stability, 1 hour

< 100

< 100

< 100

< 200

< 200

ppm

Quiescent Current

50

50

250

250

250

mA

Temperature Coefficient

< 200

ppm / ºC

Leakage Current

0

mA

PHOTODIODE FEEDBACK

High Range

50 – 5000

µA

Low Range, Type A & B Lasers Only

15 – 500

µA

Constant Power Mode Output Stability

< 0.02

%

EXTERNAL MODULATION

Analog Input Damage Threshold

(V

V

Input Pin Impedance

1

MΩ

max current

190

200

200

140

100

kHz

90

%

Rise / Fall Time

5 / 3

5 / 3

5 / 3

4 / 3

12 / 5

µsec

Output Turn-On Delay

≥1.5

seconds

Slowstart Output On-Time

250

msec

Disable Fall Time

>100

µsec

MONITOR ACCURACY

Monitor Voltage vs. Expected Output

based on transfer function

2

% of Full Scale

1. In order to drive full current to the laser, the supply voltage may need to be increased to 5.5 V to compensate for voltage drop across the cables at high

current.

2. Modulation bandwidth in Constant Power mode will depend on the photodiode frequency response. Photodiode specifications vary widely from one

manufacturer to another, but the bandwidth in CP mode is typically 10% of the Constant Current bandwidth.

3. Peak-to-Peak output amplitude decreases as frequency increases; see figure at right.

4. See

page 17 for timing graphs.

5. See

page 16 for PLD Revision F timing characteristics.

0 mA

Full Current

100% Depth of Modulation at 10 Hz

100 %

0 %

90% Depth of Modulation at 100 kHz

90 %

95 %

5 %