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AMC1350: Application issues.

Reed
Expert 2050 points
Part Number: AMC1350
Other Parts Discussed in Thread: AMC3330

Tool/software:

Hi Team,

Please help analyze the issue of output voltage distortion when using AMC1350 to sample three-phase AC voltage.
The original input voltage and power supply voltage have been tested and found to be normal.
Note: After splitting the 2pcs AMC1350 primary side into two power supplies, the output waveform is normal.
  • 0
    TI__Guru 56402 points

    Hi Reed,

    With a single power supply and the input not referred to ground, the input signal swings outside of the common-mode input voltage range. 

    The customer could consider the AMC3330 with integrated DC/DC to simplify the design.