Wavelength Electronics LDTC2/2E, Техническое описание и руководство по эксплуатации

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LDTC2/2 LASER DIODE DRIVER AND TEMPERATURE CONTROLLER
ELECTRICAL SPECIFICATIONS
(CONTINUED)
TEMPERATURE CONTROLLER
SPECIFICATIONS
MIN TYP MAX UNIT NOTE
TEMPERATURE CONTROL
Short Term Stability, 1 hour
[2]
0.0009 °C OFF ambient, 10 kΩ thermistor @ 25°C
Short Term Stability, 1 hour
[2]
0.002 °C ON ambient, 10 kΩ thermistor @ 25°C
Long Term Stability, 24 hours
[2]
0.002 °C OFF ambient, 10 kΩ thermistor @ 25°C
Control Loop P PI
P (Proportional Gain) 18 20 22 A / V
I (Integrator Time Constant) 2 3 4 sec
Setpoint vs. Actual Temperature Accuracy <0.2%
TSET = 25°C using a 10kΩ thermistor
(Rev. B)
OUTPUT
Peak Current ±1.8 ±2.0 ±2.2 A
Compliance Voltage
[3]
,
Full Temperature Range
|V
S
- 0.1| V TEC, I
OUT
= 100 mA
|V
S
- 0.3| V TEC, I
OUT
= 1.0 A
|V
S
- 0.3| V TEC, I
OUT
= 1.5 A
|V
S
- 0.6| V TEC, I
OUT
= 2.0 A
|V
S
- 0.6| V Resistive Heater, I
OUT
= 2.2 A
POWER SUPPLY
Voltage, V
DD
4.75 12 V
Quiescent Current, V
DD
55 105 mA
Voltage, V
S
4.5 28 V
Quiescent Current, V
S
20 50 100 mA
TEMPERATURE SENSORS
Sensor Compatibility Thermistor, RTD, IC Sensors
Sensor Input Voltage Range
[4]
GND to V
DD
- 2.0 V
Sensor Input Damage Threshold < -0.7 > V
DD
+7 V
VSET
Input Impedance 500 kΩ
VSET Damage Threshold < -0.7 > V
DD
+7 V
BIAS CURRENT
Bias Current Accuracy 1 % Include bias current resister tolerance
THERMAL
Heatspreader Temperature Rise
[5]
28 30 33 °C / W No heatsink, thermal washer, or fan
Heatspreader Temperature Rise
[5]
18 21.5 25 °C / W
With WHS302 Heatsink and
WTW002 Thermal Washer, no fan
Heatspreader Temperature Rise
[5]
3.1 3.4 3.9 °C / W
With WHS302 Heatsink,
WTW002 Thermal Washer,
and 3.5 CFM fan
[2]
When using resistive heaters, stability can only be consistently achieved when specified temperatures are 10°C or more
above ambient.
[3]
Compliance voltage available between Pins 6 & 7 (TEC+ & TEC-) on J3.
[4]
The bias source has a compliance up to V
DD
- 2 V. In normal operation this limits the sensor voltage range from 0 V to
V
DD
- 2 V. While voltages up to ±5 V outside this range on the VSET pin will not damage the unit, it will not provide proper
control under these conditions.
[5]
T
AMBIENT
= 25°C. Applies to LDTC2/2O
only
. Valid for both laser driver and temperature controller (WLD & WTC).