7

ELECTRICAL SPECIFICATIONS

DRIVER OUTPUT CURRENT

MIN

TYP

MAX

UNITS

NOTES

Output Current

0.5, 1.0, 1.5, or 2.0

A

RMS Noise Current

0.4

1.0

1.3

μA RMS

QCL1000 at 500 mA output, 100 kHz test bandwidth

Noise Current Density

1

2

4

nA / √Hz

QCL1000 at 500 mA, 10 Ω test load

Stability, short and long term

5

10

15

ppm

25°C ambient

Temperature Coefficient

5

10

18

ppm / °C

Compliance Voltage Range

10

20

V

Internal Supply Voltage can be adjusted from the front

panel.

NOTE: With this current source, the voltage developed

across the load (laser) is not driven by the controller,

but by Ohm’s Law and the resistance of the load

(laser).

Slow Start Current Ramp (after

Enabled)

1.5

msec

To setpoint

Delayed Start

2

sec

User adjustable

EXTERNAL MODULATION

MIN

TYP

MAX

UNITS

NOTES

Modulation Bandwidth

2

3

MHz

Sinewave

Rise/Fall Time

250 / 200

nsec

To full scale

Slew Rate

30

V / µsec

Depth of Modulation

90

%

At 500 kHz

External Modulation Input

Range

-5 to +5

V

Input Impedance

1

kΩ

External Modulation Input

Damage Threshold

-10 to +10

V

BNC Connector

MONITORS AND OUTPUTS

VALUE

UNIT

NOTES

Setpoint Resolution

16

bits

5V = fullscale output

Display Accuracy Measurement

Resolution

24

Bits

Accuracy,

Current

Output

Monitor vs. Actual Current

(display or analog output)

0.2

%

> 5% of full scale

0.5

%

< 5% of full scale

Accuracy, Current Setpoint vs.

Actual Current

0.2

%

Internal setpoint

0.2

%

External modulation

Accuracy, Analog Setpoint

Monitor1

5

%

>10% of full scale

25

%

<10% of full scale

1

Current Setpoint Monitor is a reference signal only, and may deviate from the actual setpoint by up to 5% when the setpoint is greater

than 10% of full scale.

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