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QCL500, QCL1000, QCL1500 Low Noise Quantum Cascade Laser Drivers
PAGE 3
QCL1500-00400-D
Positive Supply Voltage
Negative Supply Voltage
Output Current (See SOA Chart [1])
Internal Power Dissipation, +25˚C, no air
Operating Temperature, case [2]
Storage Temperature
Weight
Size
ELECTRICAL AND OPERATING SPECIFICATIONS
Volts DC
Volts DC
mA
Watts (model dependent)
˚C
˚C
lbs
inches
(mm)
UNIT
VALUE
5
5
5
0.75
+ 22
- 22
+ 25
- 25
500, 1000, 1500
10, 16 , 21
- 40 to + 50
- 55 to +125
2
5.5 x 6.55 x 2.3
(140 x 166 x 59)
V
+
V
-
I
OUT
P
MAX
T
OPR
T
STG
ABSOLUTE MAXIMUM RATINGS
RATING
SYMBOL
ppm
ppm
ppm
Volts
nsec
nsec
V /
sec
MHz
sec
msec
%
mA
A RMS
nA /
S
Hz
V DC
V DC
mA
mA
mA
15
15
15
3
3
+ 25
- 25
10
10
10
16
250
200
30
2
1.25
100
90
2
1
2
+ 24
- 24
250
100
450
CONSTANT CURRENT CONTROL
Short Term Stability, 1 hour
Long Term Stability, 24 hours
Temperature Coeffi cient
Compliance Voltage, Laser Load [3]
Rise Time
Fall Time
Slew Rate
Bandwidth, 3 dB
Delayed start
Slow Start ramp
Depth of Modulation [4]
Leakage Current
NOISE
(graphs on page 5)
[5]
Noise Current (RMS) [1 A model]
Noise Current Density
POWER SUPPLY
Voltage, V
+
Voltage,
V
-
Current, V+ supply, quiescent
Current, V
- supply, quiescent
Inrush current requirement [6]
TYP
MIN
MAX
UNITS
TEST CONDITIONS
PARAMETER
T
AMBIENT
= 25˚C
T
AMBIENT
= 25˚C
- 24 V in
to full scale
to full scale
large signal (< 90% full scale)
to full scale
at 500 kHz
I
OUT
= 100mA, 100 kHz bandwidth
I
OUT
= 100mA, R
LOAD
= 10
[1] SOA: Safe Operating Area - Determine if power dissipated in the QCL Driver with your operating parameters
exceeds limits. Online calculator at
http://www.teamwavelength.com/support/calculator/soa/soald.php
.
Charts are also available in Appendix A.
[2] Derating begins at 35°C. QCL2000 maximum operating temperature is 35°C. Derating starts at 25°C.
[3] Safety circuits monitor tightly around the nominal 24 V inputs. For a lower input voltage (more effi cient for QCLs
with lower compliance voltages), contact the factory for a Product Variation.
[4] As frequency increases on the analog input, the
peak-to-peak output amplitude diminishes. For example,
these graphs show the waveform shape at 10 Hz and
500 kHz. Depth of modulation continues to decrease
after 500 kHz.
[5] How noise measurements are made is detailed in WEI’s Low Noise Measurement Protocol Technical Note.
[6] Negative power supply must source at least 450 mA. If current to QCL exceeds 450 mA, DC power supply
capacity should be QCL current plus quiescent current
0 mA
Full Current
100% Depth of Modulation at 10 Hz
100 %
0 %
90% Depth of Modulation at 500 kHz
90 %
95 %
5 %
