Wavelength Electronics LDTC0520, Datasheet And Operating Manual

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LDTC0520 / LDTC1020 LASER DIODE AND TEMPERATURE CONTROLLER
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
SYMBOL
LDTC0520 LDTC1020 UNIT NOTE
LD Supply Voltage V
DD_FL
3 to 12 VDC
TC Electronics Supply Voltage V
DD_WTC
4.5 to 12 VDC
TC Load Supply Voltage V
S
4.5 to 30 VDC
Max LD Output Current I
LD
505 1010 mA
Max TC Output Current I
TEC
±2.2 A
Laser Driver Internal Power Dissipation
1
P
LD_MAX
2 4 W T
AMBIENT
= 25ºC
1
Temp Controller Internal Power Dissipation P
TC_MAX
9 W
Case Operating Temperature T
OPR
-40 to 85 ºC
Case Storage Temperature T
STG
-55 to 125 ºC
Weight 3.04 3.13 oz
86.2 g (LDTC0520)
88.7 g (LDTC1020)
Size 2.9 × 2.35 × 1.08 inches 73.6 × 59.7 × 27.3 mm
LASER DRIVER
SPECIFICATIONS
SYMBOL LDTC0520 LDTC1020 UNIT NOTE
CONSTANT CURRENT CONTROL
Short Term Stability, 1 hour 35 to 40 ppm T
AMBIENT
= 25ºC
Long Term Stability, 24 hours 50 to 75 ppm T
AMBIENT
= 25ºC
CONSTANT POWER CONTROL
Short Term Stability, 1 hour 0.019 % T
AMBIENT
= 25ºC
Long Term Stability, 24 hours 0.011 % T
AMBIENT
= 25ºC
OUTPUT
Peak Current I
MAX
495 to 505 990 to 1010 mA
Compliance Voltage V
DD_FL
‑ (0.5 · V
EXT LD SET
) V I
MAX
= 500 mA
Rise Time 300 nsec I
LD
= 500 mA
Fall Time 300 nsec I
LD
= 500 mA
Bandwidth, Constant Current
2
500 kHz Sinewave input signal
Delayed Start 100 msec
Slow Start Ramp 15 mA / msec
Depth of Modulation 99 % 100 kHz sinewave
LD POWER SUPPLY
Power Supply Voltage V
DD_FL
3 to 12 V
Quiescent Current, V
DD_FL
2.2 to 4.6 4.4 to 9.2 mA
EXT LD SET INPUT
Input Impedance 5 kΩ
Input Voltage Range V
EXT LD SET
0 to 2 V
Damage Threshold ‑0.3 > V
EXT LD SET
> V
DD_FL
+ 0.3 V
NOISE
Noise and Ripple (RMS) 7.5 22 µA RMS I
LD
= 100 mA; 100 kHz bandwidth
Leakage Current
1
0.2
0.3
mA
V
EXT LD SET
= 0 V, Output = ON
V
EXT LD SET
= 0 V, Output = OFF
V
EXT LD SET
= 2 V, Output = OFF
1
Derate laser driver internal power dissipation by 34 mW / °C when operating above 25ºC. For the LDTC1020 with dual
FL500 chips, derating should be applied to both chips for a total of 68 mW / °C.
2
Modulation bandwidth in Constant Power mode is dependent on photodiode bandwidth, and is typically lower than the
bandwidth in Constant Current mode because of the frequency response of the photodiode.