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AMC1305L25: AMC1305 miss AVDD

Sammi Shang
Expert 4450 points
Part Number: AMC1305L25

Dear team,

When AMC1305 miss AVDD, DOUT will stay in the obvious level for a long time until have new input. 

But during customer's test, they found that DOUT could not hold to "1" or "0", for example, when miss AVDD, DOUT will be 0 as previous status is 0, but it will turn to 1 randomly, could you kindly share if you see same phenomenon? 

Thanks.

Best regards,

Sammi

  • 0
    TI__Guru**** 180941 points
    Hi Sammi!

    Are you toggling AVdd on the AMC1305 to get the output state to change? The output state should not change once AVdd goes away, although ot could take on either a high or low (FS- or FS+) state with each removal of power. The output should hold the last state of the output buffer (see Figure 51 and the text of section 8.4.1).