Abnormal Power Supply to AD9516-1

Dear,

My customer is using AD9516-1 for his application.

By unknown reason, voltage at Ground and 3.3V power are increased to 0.5V and 3.8V respectively.

In this case, What could be happen to AD9516-1 ?

Will AD9516-1 not be affected from this power level increasing ?

If will be affected, What kind of things will happen ?

Thanks.

  • 0
    •  Analog Employees 
    on Jan 26, 2018 4:17 PM

    Dear Jiwon,

    The only thing that matters is the difference between Vdd and GND. It does not matter if Vdd is 3.8V and GND is 0.5V as long as every voltage is within spec relative to power and ground. For example, if VIH_min is 0.5V in the spec table, then VIH_min becomes 1.0V in this example.

    Every spec in the datasheet should be measured relative to GND. As long as a voltage in spec relative to GND (or Vdd, depending on the spec), you are ok.

    -Paul

  • Dear Paul,

    Thanks for your kind explanation.

    Just one simple question, Before shipping to customer,

    Does ADI test(ATE) this kind of power supply condition(for example, GND=0.5V, Vs = 3.8V) ?

    Thanks.

  • 0
    •  Analog Employees 
    on Jan 30, 2018 2:48 AM

    Hello Jiwon,

    > Does ADI test(ATE) this kind of power supply condition(for example, GND=0.5V, Vs = 3.8V) ?

    No, but if you think about it, all that matters is that all of the voltages related to the part are relative to ground.

    If you wanted to, you could operate the part just fine at GND=1000V and VDD=1003.3V.

    But if you do that, don't touch it if your body is at 0V. :-)

    -Paul