Analogue, Mixed Signal, LSI


Current sense amp

17 August 2011 Analogue, Mixed Signal, LSI

The LT6109 is Linear Technology’s new high-side current sense device that incorporates a current sense amplifier, dual comparators and a precision 400 mV voltage reference. When connected to a current shunt resistor, the amplifier precisely extracts the shunt voltage, amplifies it and translates it to ground. This output is available for monitoring and can be connected to either of the on-chip comparators. The current sense amplifier has less than 350 μV of offset and the combined threshold error of the comparators and reference is less than 2%. From the input of the amplifier to the output of the comparators, the LT6109 responds to threshold exceeding events within 1,4 μs. These attributes make the device suitable for current measurement and load current fault monitoring.



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