The INA381 includes both a 26-V common-mode,
current-sensing amplifier and a high-speed
comparator configured to detect overcurrent
conditions through measuring the voltage developed
across a current-shunt resistor and comparing that
voltage to a defined threshold limit set by the
comparator reference pin. The current-shunt monitor
can measure differential voltage signals on commonmode
voltages that can vary from –0.2 V up to 26 V,
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 standalone comparator alert response
time is under 3 μs, allowing for quick detection of
overcurrent events. The total system overcurrent
protection provided by the INA381 is under 10 μs.
This device operates from a single 2.7-V to 5.5-V
supply, drawing a maximum supply current of 350 μA.
The device is specified over the extended operating
temperature range (–40°C to +125°C), and is
available in an 8-pin WSON package. INA381A1IDSGR
INA381A1IDSGT
INA381A2IDSGR
INA381A2IDSGT
INA381A3IDSGR
INA381A3IDSGT
INA381A4IDSGR
INA381A4IDSGT
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