Low noise cathode-grounded laser driver
![DRV300 Low noise cathode-grounded laser driver DRV300 Low noise cathode-grounded laser driver](https://assets.koheron.com/images/products/drv300/DRV300.jpg?01072024141256)
![DRV300 Low noise cathode-grounded laser driver DRV300 Low noise cathode-grounded laser driver](https://assets.koheron.com/images/products/drv300/DRV300.jpg?01072024141256)
![DRV300 Low noise cathode-grounded laser driver current noise density DRV300 Low noise cathode-grounded laser driver current noise density](https://assets.koheron.com/images/products/drv300/DRV300_current-noise-density.png?01072024141256)
![DRV300 Low noise cathode-grounded laser driver modulation frequency response DRV300 Low noise cathode-grounded laser driver modulation frequency response](https://assets.koheron.com/images/products/drv300/DRV300-A-200_modulation-frequency-response.png?01072024141256)
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).
Quantity | Price |
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Resources
Specifications
DRV300-A-10 | DRV300-A-40 | DRV300-A-200 | |
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Current driver | |||
Laser current | 0 mA to 10 mA | 0 mA to 40 mA | 0 mA to 200 mA |
Compliance voltage | 4.0 V | 4.0 V | 4.0 V |
Slow start(90 % setpoint) | 800 ms | 800 ms | 800 ms |
Current limit(L setting) | 11 mA | 25 mA | 160 mA |
Current limit(H setting) | 11 mA | 44 mA | 220 mA |
RMS noise(10 Hz to 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 |
Modulation gain(Low setting) | 40 µA/V | 160 µA/V | 800 µA/V |
Modulation gain(Medium setting) | 200 µA/V | 800 µA/V | 4 mA/V |
Modulation gain(High setting) | 1 mA/V | 4 mA/V | 20 mA/V |
Input range | -1.2 V to 2 V | -1.2 V to 2 V | -1.2 V to 2 V |
Input impedance | 50 Ω | 50 Ω | 50 Ω |
Trimming input | |||
Gain | 0.5 mA/V | 2 mA/V | 10 mA/V |
3 dB 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 | |||
Current monitor gain | 100 V/A | 25 V/A | 5 V/A |
3 dB bandwidth | 250 Hz | 250 Hz | 250 Hz |
Output impedance | 1 kΩ | 1 kΩ | 1 kΩ |
Power supply | |||
Supply voltage | 8.5 V to 12 V, nom. 9 V | 8.5 V to 12 V, nom. 9 V | 8.5 V to 12 V, nom. 9 V |
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 °C to 70 °C | -20 °C to 70 °C | -20 °C to 70 °C |
Compatible lasers | Floating and cathode-grounded diodes | Floating and cathode-grounded diodes | Floating and cathode-grounded diodes |
More Laser drivers
Characterization
Current noise
The figure below shows the current noise density of DRV300 laser drivers operated at their rated current.
![DRV300 Low noise cathode-grounded laser driver current noise density DRV300 Low noise cathode-grounded laser driver current noise density](https://assets.koheron.com/images/products/drv300/DRV300_current-noise-density.png?01072024141256)
Current stability
The figure below shows the current stability of the DRV300-A-200 laser driver driving 200 mA.
![DRV300-A-200 Low noise cathode-grounded laser driver one hour current stability DRV300-A-200 Low noise cathode-grounded laser driver one hour current stability](https://assets.koheron.com/images/products/drv300/DRV300-A-200_one-hour-current-stability.png?01072024141256)
Modulation frequency response
The figure below shows the modulation frequency response of the DRV300-A-200 laser driver driving 200 mA.
![DRV300-A-200 Low noise cathode-grounded laser driver modulation frequency response DRV300-A-200 Low noise cathode-grounded laser driver modulation frequency response](https://assets.koheron.com/images/products/drv300/DRV300-A-200_modulation-frequency-response.png?01072024141256)
Trimming input frequency response
The 10 Hz low-pass filter (> 80 dB rejection at 1 kHz) rejects wideband noise that could be injected by the trimming signal.
![DRV300 Low noise cathode-grounded laser driver trimming input frequency response DRV300 Low noise cathode-grounded laser driver trimming input frequency response](https://assets.koheron.com/images/products/drv300/DRV300_trimming-input-frequency-response.png?01072024141256)
Combining multiple DRV300 laser drivers
Thanks to the cathode-grounded architecture of the driver, multiple DRV300 laser drivers can be mounted in parallel to increase output current. The DRV300 can also be mounted in parallel with any other cathode-grounded current driver such as the DRV110 Ultra low noise high-voltage laser driver.
The figure below shows the current noise density for 1, 2 and 3 DRV300-A-200 driver(s) mounted in parallel, with each driver operating at 200 mA:
![DRV300 Low noise cathode-grounded laser driver Current noise density of drivers mounted in parallel DRV300 Low noise cathode-grounded laser driver Current noise density of drivers mounted in parallel](https://assets.koheron.com/images/products/drv300/DRV300_current-noise-mounted-parallel.png?01072024141256)
Current noise density increases with the square root of the number of drivers (323, 455 and 560 pA/√Hz for 1, 2 and 3 drivers, respectively).