Of the following pins, which ones are "latched" in at time of power-on reset of AD5421?
The AD5421 powers on with all registers loaded with their default values and with the loop current in the alarm state set to 3.2 mA or 22.8 mA/24 mA (depending on the state of the ALARM_CURRENT_DIRECTION pin and the selected range).
The most pins that you mentioned are input pins in a sense that the part will power up and will set settings of the part depending on the values of these pins.
Considering the maximum supply current drawn from the DVDD of AD5421.
These would already be equal to 5.15mA. We haven't even added the current drawn from the pull-up resistors, LEDs etc.
I have one more doubt on AD5420. If I don't provide AVDD and if DVCC select is not connected and if I connect 3.3V to DVCC externally whether AD5420 consumes 1mA from external voltage that I have connected?
Nidhi P Shetty