The 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 INA302
comparators are configured to detect and respond to overcurrent conditions. The INA303 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 –0.1 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.
This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply
current of 950 µA. The device is specified over the extended operating temperature range (–40°C to
+125°C), and is available in a 14-pin TSSOP package.
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