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QCL500, QCL1000, QCL1500 Low Noise Quantum Cascade Laser Drivers
PAGE 2
QCL1500-00400-D
Figure 1
Quick Connect
QUICK CONNECT
More details (and cautions) are available in the Pin Descriptions and Operating Sections of this
datasheet (pages 7 and 8 respectively).
Until you are comfortable with the driver operation, we recommend you use a test load instead
of an actual QCL. A resistor, metal fi lm, TO-220, 50 W, is a typical test load. Two vendor
numbers are:
Caddock MP850-10.0-1% (Digikey part number MP850-10.0-F-ND) or
Ohmite TCH35P10R0JE (Digikey part number TCH35P10R0JE-ND)
10
:
, 50 W
metal film
resistor
QCL + *
Pin 19
QCL -
Pin 20
* Internally grounded
Figure 2
Example Test Load
NOTE: At 2 A, output current will be
compliance voltage limited with a
10
resistor. Use a 5
resistor such
as Caddock MP850-5.00-1% (Digikey
part number MP850-5.00-F-ND).
1 No
Connect
2 No
Connect
3
Remote Power On -
4
Remote Power On +
5
Remote Enable - *
6
Remote
7
QCL Enable Status
8 Power
Status
9
Overtemp Fault Status
10 Current
Monitor
11 Limit
Monitor
12 Monitor
Ground
13 ANALOG
IN
14
ANALOG IN GND
15 Ground
16 V
+
17 V
-
18 POWER
GROUND
19
QCL + (Ground)
20 QCL
-
INTERNALLY
TIED
QCL
+
-
0-5 V
Can go negative by the
DC offset of onboard
setpoint trimpot.
+
-
ENABLED = HI
DISABLED = LO
ON = HI
OFF = LO
V
V
TTL
TTL
* *
Optically isolated from ground
(user-configurable)
