Wavelength Electronics PLD K-CH Series, Datasheet And Operating Manual

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PLDXK-CH SERIES LASER DIODE DRIVER
ELECTRICAL SPECIFICATIONS
PARAMETER SYMBOL VALUE UNIT NOTE
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (H1:2) +5 V 5.0 to 5.5 VDC See Power Supply Requirements on page 8
Supply Voltage, (H1:3)
1
PLD12.5K-CH laser supply
High Compliance laser
LD Anode 4.5 to 30 VDC
Consult Safe Operating Area calculator for supply
voltages > 5 VDC, see page 20 ; PLD12.5K-CH
requires two power supplies, see
Power Supply Requirements on page 8 .
Supply Voltage, Type C Lasers
1
Aux V+ 8.0 to 12.5 VDC
Operating Temperature Range
2
T
OPR
0 to 50 ºC
Storage Temperature Range T
STG
-55 to 125 ºC
Weight 3.2 oz 89.6 g
Size 1.12 x 2.35 x 3.2 in 28.5 mm x 59.7 mm x 81.3 mm
1. For two-supply operation, it is critical to shut down the power supply to the laser first before shutting down the +5V supply powering the electronics.
2. Maximum operating temperature of PLD12.5K-CH is 35ºC.
MODEL
PARAMETER
PLD5K-CH PLD10K-CH PLD12.5K-CH
UNIT NOTE
DRIVE CURRENT OUTPUT
Max Internal power Dissipation 40 W
Max Output Current 5
1
10
1
12.5
1
A
Compliance Voltage
2
3 V max with 5 V power supply input
28 V max with 30 V power supply input
85 V max with Product Variation
V
Short Term Stability, 1 hour < 100 < 200 < 200 ppm
Quiescent Current 150 150 250 mA
Temperature Coefficient < 200 ppm / ºC
Noise & Ripple
3
> 45 µA
PHOTODIODE FEEDBACK
High Range, Type A & B Lasers Only 50 - 5000 µA
Low Range 15 - 500 µA
Constant Power Mode
Output Stability
< 0.02 < 0.05 < 0.05 %
EXTERNAL MODULATION
Analog Input Damage Threshold
–0.5 V < ANALOG IN, or
ANALOG IN > (Supply V 0.5V)
V
Input Pin Impedance 1 MΩ
3 dB Bandwidth, Constant Current
4
120 80 50 kHz
BW at 90% Depth of Modulation
4
70 70 40 kHz Constant Current Mode
Output Rise / Fall Time 4.8 / 9.4 5.9 / 10 8 / 9 µsec
TIMING CHARACTERISTICS
Output Turn-On Delay ≥1.5 seconds
Slowstart Output On-Time 250 msec
Disable Fall Time >100 µsec
MONITOR ACCURACY
Monitor Voltage vs. Expected Output
based on transfer function
2
% of Full
Scale
1. To achieve maximum rated current, the power supply voltage may need to be 5.5 VDC because the impedance of external wiring may reduce
the voltage at the laser driver.
2. Compliance voltage depends on power supply voltage. In high-compliance
mode, a maximum compliance voltage of 28 V is obtained using a 30 VDC
power supply. A 5 VDC power supply input results in 3 V compliance voltage.
3. Not recommend for low noise applications. See the LDxCHA webpage for lower noise laser drivers
4. Peak-to-peak output amplitude decreases as frequency increases; see figure at right.
Note: 90% DOM for PLD12.5K-CH is at 40 kHz.
0 mA
Full Current
100% Depth of Modulation at 10 Hz
100 %
0 %
90% Depth of Modulation at 70 kHz
90 %
95 %
5 %