Overcurrent protection high-speed, precision current sense amplifier with integrated window comparator

Texas Instruments’ INA302 and INA303 devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The comparators are configured to detect and respond to overcurrent conditions. The comparators are configured to respond to both over- and undercurrent conditions in a windowed configuration. The device features an adjustable limit threshold range for each comparator set using an external limit-setting resistor. These current-shunt monitors can measure differential voltage signals on common-mode voltages that can vary from –0.1V up to 36V, independent of the supply. The open-drain alert outputs can be configured to operate in either a transparent mode (output status follows the input state) or in a latched mode (alert output is cleared when the latch is reset). The alert response time for comparator 1 is under 1µs and the alert response for comparator 2 is set through an external capacitor ranging from 2µs to 10s. This device operates from a single 2.7V to 5.5V supply, drawing a maximum supply current of 950µA. The device is specified over the extended operating temperature range (–40C to +125C), and is available in a 14-pin TSSOP package.