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TLV5616: In 48~52HZ frequency band, output jitter is serious

Timsen
Expert 1660 points
Part Number: TLV5616

Dear all:

      Use TLV5616, supply 5V, reference voltage 2.5V.In the frequency band of 48~52HZ, the output pin is observed by oscilloscope.This has not happened in other frequencies

Why? How to solve

Please help!

Thank  you!

  • Why? How to solve

  • 0
    TI__Guru 53773 points

    Hi,

    50Hz noise is almost always caused by the 120V AC power mains 50Hz switching.  In the US AC power is at 60Hz, but most of Europe and China operate at 50Hz.  This noise is almost impossible to remove without very heavy filtering and the elimination of ground loops.  You could test by replacing the power supply with a steady state DC source, like a battery, and see if the noise goes away, though the noise could also be found in the instrument you are using to measure it.

    Thanks,

    Paul