Name: Low noise cathode-grounded laser driver
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Low noise cathode-grounded laser driver

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Koheron DRV300 is a low noise current driver for cathode-grounded laser diodes. It drives up to 200 mA laser current and features a DC to 10 MHz modulation input with adjustable modulation gain. A precision trimming input enables fine external tuning of the laser current. The 10 mA max. output current model with its ultra-low noise is well suited to drive Vertical-Cavity Surface-Emitting Lasers (VCSEL).

Laser current	0 - 10 mA	0 - 40 mA	0 - 200 mA
Current driver
Maximum compliance voltage	4.0 V	4.0 V	4.0 V
Slow start (90 % setpoint)	800 ms	800 ms	800 ms
Current limit (H / L)	11 mA (Fixed)	44 mA / 25 mA	220 mA / 160 mA
RMS noise (10 Hz - 1 MHz)	25 nArms	75 nArms	350 nArms
Current noise density (1 kHz)	23 pA/√Hz	70 pA/√Hz	340 pA/√Hz
Temperature coefficient	50 ppm/°C	50 ppm/°C	50 ppm/°C
Modulation input
3 dB bandwidth	10 MHz	10 MHz	10 MHz
Gains	40 µA/V, 200 µA/V, 1 mA/V	160 µA/V, 800 µA/V, 4 mA/V	800 µA/V, 4 mA/V, 20 mA/V
Input range	-1.2 V / +2 V	-1.2 V / +2 V	-1.2 V / +2 V
Input impedance	50 Ω	50 Ω	50 Ω
Trimming input
Gain	500 µA/V	2 mA/V	10 mA/V
Bandwidth	10 Hz	10 Hz	10 Hz
Input range	±2 V	±2 V	±2 V
Input impedance	2 kΩ	2 kΩ	2 kΩ
Current monitor output
Gain	100 V/A	25 V/A	5 V/A
Bandwidth	250 Hz	250 Hz	250 Hz
Output impedance	1 kΩ	1 kΩ	1 kΩ
Power supply
Supply voltage	8.5 V - 12 V (9 V nomimal)	8.5 V - 12 V (9 V nomimal)	8.5 V - 12 V (9 V nomimal)
Quiescent current (laser disabled)	10 mA	10 mA	10 mA
Quiescent current (laser enabled)	60 mA	60 mA	60 mA
Other
Outside Dimensions	58 mm x 50 mm x 14 mm	58 mm x 50 mm x 14 mm	58 mm x 50 mm x 14 mm
Weight	19 g	19 g	19 g
Operating temperature	-20 - 70 °C	-20 - 70 °C	-20 - 70 °C
Compatible lasers	Floating and cathode-grounded diodes	Floating and cathode-grounded diodes	Floating and cathode-grounded diodes

Laser current	0 - 10 mA	0 - 40 mA	0 - 200 mA
Current driver
Maximum compliance voltage	4.0 V	4.0 V	4.0 V
Slow start (90 % setpoint)	800 ms	800 ms	800 ms
Current limit (H / L)	11 mA (Fixed)	44 mA / 25 mA	220 mA / 160 mA
RMS noise (10 Hz - 1 MHz)	25 nArms	75 nArms	350 nArms
Current noise density (1 kHz)	23 pA/√Hz	70 pA/√Hz	340 pA/√Hz
Temperature coefficient	50 ppm/°C	50 ppm/°C	50 ppm/°C
Modulation input
3 dB bandwidth	10 MHz	10 MHz	10 MHz
Gains	40 µA/V, 200 µA/V, 1 mA/V	160 µA/V, 800 µA/V, 4 mA/V	800 µA/V, 4 mA/V, 20 mA/V
Input range	-1.2 V / +2 V	-1.2 V / +2 V	-1.2 V / +2 V
Input impedance	50 Ω	50 Ω	50 Ω
Trimming input
Gain	500 µA/V	2 mA/V	10 mA/V
Bandwidth	10 Hz	10 Hz	10 Hz
Input range	±2 V	±2 V	±2 V
Input impedance	2 kΩ	2 kΩ	2 kΩ
Current monitor output
Gain	100 V/A	25 V/A	5 V/A
Bandwidth	250 Hz	250 Hz	250 Hz
Output impedance	1 kΩ	1 kΩ	1 kΩ
Power supply
Supply voltage	8.5 V - 12 V (9 V nomimal)	8.5 V - 12 V (9 V nomimal)	8.5 V - 12 V (9 V nomimal)
Quiescent current (laser disabled)	10 mA	10 mA	10 mA
Quiescent current (laser enabled)	60 mA	60 mA	60 mA
Other
Outside Dimensions	58 mm x 50 mm x 14 mm	58 mm x 50 mm x 14 mm	58 mm x 50 mm x 14 mm
Weight	19 g	19 g	19 g
Operating temperature	-20 - 70 °C	-20 - 70 °C	-20 - 70 °C
Compatible lasers	Floating and cathode-grounded diodes	Floating and cathode-grounded diodes	Floating and cathode-grounded diodes