• State
  • Locked Locked
  • Replies 5 replies
  • Subscribers 47 subscribers
  • Views 1844 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TVP5150AM1 : IO_DVDD range

Devin Park
Expert 5965 points
Other Parts Discussed in Thread: TVP5150AM1, TVP5150

Hi,

BTW, my customer is applying 1.8V to IO_DVDD. So digital i/o ranges(I2C and YUV output) are [0~1.8V] and it looks working properly.

BTW, TVP5150AM1 datasheet says that IO_DVDD should be connected to 3.3V.

Could you please describe why 1.8V wil not operate properly? My customer wants  some more detailed information.

 

B.Regards,

Devin

 

 

  • 0
    TI__Mastermind 43875 points
    Devin,
    The chip was designed for 3.3V. That is why it will not work reliably at 1.8V.

    BR,
    Steve
  • 0 in reply to Steve Clynes
    TI__Expert 5965 points

    Hi Steve,

    Could you inspect somemore thing?

    My my customer shared the initial datasheet of TVP5150(September 2002, SLES043), which describes IO_DVDD like this:

        IO_DVDD  : IO digital supply. Either 1.8 V or 3.3 V depending on requirements.

    BTW, the lateset version of TVP5150(Literature Number: SLES043A May 2006) just says 3.3V.  

       IO_DVDD : Digital supply. Connect to 3.3 V.

    There is no chip revision but the I/O spec was changed. I'll appreciate if you share the reason why it was changed.

    ( I guess many things of TVP5150AM1's come from TVP5150 so ask you about TVP5150)

     

    Regards,

    Devin

  • 0 in reply to Devin Park
    TI__Genius 13460 points
    You are refering to the TVP5150 datasheet but what is on your board is TVP5150AM1.
    I will suggest you look into the TVP5150AM1 , it says only 3.3V is supported.
    I think it is quite clear.

    BR,
    Eason
  • 0 in reply to Eason Wang
    TI__Expert 5965 points

    Eason,
    My customer is still thinking that IO_DVDD of tvp5150am1 can be connected to 1.8V.


    This is because io_dvdd of TVP5150 could be connected to 1.8V according to the initial version of datasheet(year 2002). But the latest version(year 2006) doesn't mention about 1.8V without any comment(also there was no h/w revision, is it right?). Then, some customers btw 2002 and 2006 might use 1.8V.
    So I need to check why 1.8V was removed in the latest datasheet of tvp5150.

    Regards,
    Devin

  • 0 in reply to Devin Park
    TI__Mastermind 43875 points
    Devin,
    If the customer does not follow the latest datasheet then they cannot expect the chip to work correctly.

    If it works for them, great, but it is not supported.

    BR,
    Steve