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DS90UB960-Q1: POC problem

Colt Zhang
Expert 5045 points
Part Number: DS90UB960-Q1

Tool/software:

hi expert,

There is a question about the 4G or 2G POC circuit of DS90UB960. 

The DS90UB960 is used in the Headunit. It is to communicate with camera module.The serializer is DS90UB933 in the camera module.

The POC circuit is designed to power camera module . There are two kinds of POC circuits in the DS90UB960 spec. One is 4G，another one is 2G.

Refer to the below picture, it is the 4G POC circuit in the Head unit.The POC circuit of Camera module is the 2G structure.

Question: 

Can the DS90UB960 with 4G POC and the DS90UB933 with 2G POC work together?

Please let me know if you need more information?

  • 0
    TI__Mastermind 28820 points

    Hello Colt,

    Does your customer have access to the FPD3 Channel Specifications document? If not, please follow the email template to request it for your customer here:

    https://sps16.itg.ti.com/sites/HSDCOVERVIEW/EFL/FPD-Link/_layouts/15/start.aspx#/SitePages/Channel%20Specifications.aspx

    The 4G POC network is optimized to provide low-loss for Synchronous/Non-Synchronous frequency ranges. Customer needs to confirm that the high-speed RIN+ trace in their system will still meet the IL/RL limit lines defined in the Channel Specs document with the chosen PoC network attached. This is system dependent.

    If their system cannot meet the IL/RL limit lines, then they can either update their layout or reach out directly to a coil vendor to have them suggest a PoC network that minmizes IL/RL in the frequency range of our SER/DES devices.

    Best,

    Justin Phan 

  • 0 in reply to Justin Phan
    Prodigy 20 points

    Hello Justin

    I am Sem Lee who is an HW engineer. Above question is from my side. I can't post the question at E2E. I asked Colt to post the question.

    Base on your feedback, I understood that the critical factor is the IL/RL of transmission. I don't need care the circuit match between 4G-POC of Headunit and 2G-POC of Camera module, is that correct?

    BR.

  • 0 in reply to ?? ?
    TI__Mastermind 28820 points

    Yes, the main thing that matters is meeting the IL/RL on the PCB traces, within the limits defined by TI.

    The 4G and 2G example PoC networks were optimized to minimize loss in the 4G range (5MHz - 2.1GHz) and the 2G range (1MHz - 1GHz). You can reach out to inductor vendors for customized PoC solutions that are optimized for minimal IL/RL loss on the full range (1MHz - 2.1GHz), for your current and temperature needs