The INA302 and INA303
(INA30x) devices feature a high common-mode, bidirectional,
current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions.
The INA302 comparators are configured to detect and respond to
overcurrent conditions. The INA303 comparators are configured to
respond to both overcurrent and undercurrent conditions in a windowed configuration. These devices
feature 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 –0.1 V up to +36 V, 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 1 µs, and the alert response for
comparator 2 is set through an external capacitor ranging from 2 µs to 10 s. These devices operate from a single 2.7-V to 5.5-V supply, drawing a maximum supply
current of 950 µA. The devices are specified over the extended operating temperature range of –40°C
to +125°C, and are available in a 14-pin TSSOP package.
