Hi all,
For an application I'm going to use several LDC1614 chips and I'm curious if an specific idea I have will work. Suppose that I have 4 chips of which only one is active at a time, meaning that 1 chip has SD LOW and the other 3 have SD HIGH. The data from all 4 chips will be sampled by an Arduino in interrupt basis, so in order to reduce the amount of interrupt pins required on the Arduino, I'm thinking of connecting the INTB pins of all 4 chips onto 1 GPIO.
The data sheet states that the INTB pin is actively driven HIGH in Shutdown state, but I have my doubts and would expect tri-state behaviour here. Could someone confirm if that is the case? If it is not the case, then I can assume that my proposed approach will not work, as the INTB is triggered by pulling to LOW, which will cause the other 3 chips INTB HIGH pins to start sinking current into the 1 INTB pin that is pulling LOW.
The reason I am asking is that I would like to reduce the amount of GPIO (and thus connector) pins I need to connect my Arduino to the chips.
Kind regards,
Jim
