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TLC7524: tlc7524

Krao
Prodigy 10 points
Part Number: TLC7524
Other Parts Discussed in Thread: LM224

Hello,

I'm monitoring out. When I'm giving Digital input DB0 to DB7 is 255, but output is maximum of 3.7V. When I'm giving full digital input, I'm receiving 3.7V only. I need output of 0V to 5V, but I'm receiving of 0V to 3.7V only.

Thank you.

  • 0
    TI__Guru 53623 points

    Hi Krao,

    Can you share your schematic? What is the VDD and Reference voltage?

    Thanks,

    Paul

  • 0 in reply to Paul_Frost
    Prodigy 55 points

    i have attached schematic

  • 0 in reply to KV
    TI__Guru 53623 points

    Hi KV,

    It does not seem that the LM224 supports Rail-to-rail output operation.  I see some limitation in the datasheet that there can be VCC-1.5V as the minimum high voltage limit.  If you increase the op amp's supply, does the output work? For example, can you change +5V supply to +6V without changing the reference voltage? You could also repalce the amplifier with a device that can operate closer to the supply the rail.

    Thanks,

    Paul