The INA301-Q1 includes both a high common-mode, current-sensing amplifier and a
high-speed comparator configured to provide overcurrent protection by measuring the voltage
developed across a current-sensing or current-shunt resistor and comparing that voltage to a
defined threshold limit. This device features an adjustable limit-threshold range that is set using
a single external limit-setting resistor. This current-shunt monitor measures differential voltage
signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply
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 1 µs, allowing for quick
detection of overcurrent events.
This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply
current of 700 µA. The device is specified over the extended operating temperature range of –40°C
to +125°C, and is available in an 8-pin VSSOP package.
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