DRV300 Low noise cathode-grounded laser driver
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).
345 €
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Specifications
| DRV300-A-10 | DRV300-A-40 | DRV300-A-200 | |
|---|---|---|---|
| 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 start90 % setpoint | 800 ms | 800 ms | 800 ms |
| Current limitL setting | 11 mA | 25 mA | 160 mA |
| Current limitH setting | 11 mA | 44 mA | 220 mA |
| RMS noise10 Hz to 1 MHz | 25 nArms | 75 nArms | 350 nArms |
| Current noise density1 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 gainLow setting | 40 µA/V | 160 µA/V | 800 µA/V |
| Modulation gainMedium setting | 200 µA/V | 800 µA/V | 4 mA/V |
| Modulation gainHigh 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 currentlaser disabled | 10 mA | 10 mA | 10 mA |
| Quiescent currentlaser 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.
Current stability
The figure below shows the current stability of the DRV300-A-200 laser driver driving 200 mA.
Modulation frequency response
The figure below shows the modulation frequency response of the DRV300-A-200 laser driver driving 200 mA.
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.
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:
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).
