Texas Instruments Comparator for INA300

The INA300 is a high common-mode, precision, bi-directional, current-sensing comparator that can be configured to detect over current conditions through the voltage developed across a shunt resistor.
The INA300EVM allows for easy user configuration of the INA300 device by using jumpers.

Jumper selectable Enable and disable
Jumper selectable Latch mode and transparent mode
Jumper selectable Delay (10μs, 50μs, and 100μs)
Jumper selectable Hysteresis (2mV, 5mV, and 10mV)
Threshold set by a single resistor or an external voltage source
Power supply 2.7V to 5.5V
Configured to detect shunt voltages up to 250mV
Maximum common-mode voltage 36V

Current Sensing Amplifiers have a voltage output that is proportional to the volt drop across a very low value resistor, usually in a high-current power rail. Hence they measure the current flowing in that power rail.