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AD9364 AUXDAC Connection

Question asked by PamAparo Employee on Apr 26, 2018
Latest reply on Apr 30, 2018 by Vinod

If I use the AUXDAC to control a negative bias voltage on a PA, and I place a 22k ohm resistor between AUXDAC and -2V, will the AD9364 be damaged if the -2V rail comes up before the AD9364 rails have come up (or even if AD9364 is powered up, if the AUXDAC is not enabled yet)?  The current would be limited to well under 10mA but the voltage could exceed the -0.3V limit depending on the impedance of that AUXDAC pin when the device is powered down.