The maximum voltage that can be applied to the input pins is ±40V, but it's recommended to keep it within ±20V for optimal performance.
The gain of the INA223 can be configured by connecting the GAIN pin to VDD, GND, or leaving it open. The gain is set to 1, 2, or 4 depending on the configuration.
The REF pin is used to set the reference voltage for the internal ADC. It can be connected to a voltage reference or left open to use the internal reference.
The ALERT pin is an open-drain output that can be used to indicate an overcurrent or overvoltage condition. It can be connected to a microcontroller or other logic circuit to trigger an interrupt or alarm.
The INA223 can handle up to ±3A of current, but it's recommended to keep it within ±1A for optimal performance and accuracy.