LMH6525/6526 as a laser diode driver

Bo Dong26

Other Parts Discussed in Thread: LMH6525

Hi,

I plan to use a LMH6525/6526 as a laser diode driver. I would like to drive the laser diode (2.5G DFB) with 500mA pulsed current and the pulse width can be from 3ns to 100ns. The datasheet says the rise and fall times are 0.6/1.0ns and the total output current can be 600mA. But the way that these times were measured is something like, Iout=150mA (read) + 150mA (10% to 90%) Rload=5 ohm. So I wonder if the driver can be used to generate a 0 to 500mA current pulse down to 3 or 4ns.

Thanks.

over 8 years ago

0 Michael Lu (Santa Clara) over 8 years ago

TI__Mastermind 29635 points

Hi Bo,

The High Speed Interface Forum covers high speed SerDes and wired communication protocols such as PCIe, SAS/SATA, and Ethernet. I think our colleagues in the Fiber Communication Forum may be able to answer your laser diode driver question. I'll move this post over for better support.

Michael

0 Alex Davidson over 8 years ago in reply to Michael Lu (Santa Clara)

TI__Expert 8915 points

Michael,

The Fiber Communications Forum is mainly intended for support with the optical networking parts (devices with part numbers ONETxxxx). I am not familiar with the LMH6525/6526 as this device comes from a different group.

I will transfer this to a different forum.

Alex.

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LMH6525/6526 as a laser diode driver