High common-mode, current-sensing amplifier and a high-speed comparator configured to detect overcurrent conditions

The Texas Instruments INA301 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to detect overcurrent conditions through measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. The device features an adjustable limit threshold range that is set using a single external limit-setting resistor. This current-shunt monitor can measure differential voltage signals on common-mode voltages that can vary from 0V up to 36V, independent of the supply voltage. The open-drain alert output can be configured to operate in either a transparent mode where the output status follows the input state or in a latched mode where the alert output is cleared when the latch is reset. The device alert response time is under 1µs, allowing for quick detection of overcurrent events. This device operates from a single 2.7V to 5.5V supply, drawing a maximum supply current of 700µA. The device is specified over the extended operating temperature range (–40C to +125C), and is available in an 8-pin VSSOP package.