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Driver & Detector Supporting IC's for 1.25GBs Emitter and Photo detector

Sharvy Mayan
Intellectual 680 points
Other Parts Discussed in Thread: ONET4291VA, ONET4291PA, ONET4201PA, ONET4251PA, ONET4291TA

We are planning to develop a single directional communication system. The first system will contains only Transmit & the second with Receive. We are planning to use, VCSEL type laser diode for the Tx side & PIN Photodiode. Both are working in 1.2GB/s speed. Please suggest us a solution for both Transmitter & receiver section ( like Laser driver, Power control, Pre-Post Amplifiers  for PIN Photodiode etc ). 

  • 0
    TI__Intellectual 1715 points

    Hi Sharvy,

    Thank you for your interest in TI's optical devices.

    We do have a portfolio of 4 Gbps capable VCSEL laser drivers, post-amplifiers and TIAs that will be ideal for your 1.2 Gbps application. Please check out the following devices:

    VCSEL driver: ONET4291VA;

    Post-amplifiers: ONET4251PA; ONET4291PA; ONET4201PA;

    TIA: ONET4291TA;

    Please let us know if you have any questions on any of the above devices.

    Thanks,

    Sri

  • 0 in reply to Sriharsha Kota Pavan
    Intellectual 680 points

    Hi Sri,

    Thanks for the immediate feedback.

    1. Which interface is used to connect the VCSEL driver ( ONET4291VA ) & Host Processor ( SerDes->LVDS,LVPECL )? ( DIN+ & DIN-)
    2. I hope the Trans-impedance amplifier is connected in between Post amplifier & PIN-Detector. Isn't it?
    3. Let me know the interface's can be used on the DOUT+ & DOUT- pin of Post Amplifier (ONET4251PA) to the Host Processor.

    BR
    Sharvy

  • 0 in reply to Sharvy Mayan
    TI__Intellectual 1715 points

    Hi Sharvy,

    Please find my responses to your questions below:

    • Which interface is used to connect the VCSEL driver ( ONET4291VA ) & Host Processor ( SerDes->LVDS,LVPECL )? ( DIN+ & DIN-)

    Sri: The DIN+/- are Analog data input pins, which must be AC-coupled to the incoming data lines using 0.1μF caps. They are differentially terminated on-chip using a 100-Ω resistor;

    • I hope the Trans-impedance amplifier is connected in between Post amplifier & PIN-Detector. Isn't it?

    Sri: Yes, the TIA comes in bare die form and typically sits inside the ROSA immediately after the PIN-photodiode, while the post amplifier sits outside the ROSA. 

    • Let me know the interface's can be used on the DOUT+ & DOUT- pin of Post Amplifier (ONET4251PA) to the Host Processor.

    Sri: The DOUT+/- on the ONET4251PA are CML output pins, which must be AC-coupled as well.

    Hope this helps. Do let me know if you have further questions.

    Thanks,

    Sri