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High-Side Positive Current Sensor Monitors Negative Supply

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Abstract: This application note uses a high-side current-sense amplifier to monitor the current from a negative supply voltage. The circuit uses the IC's wide common-mode input range to amplify a small Vsense signal at the negative supply and level shift it up to a positive output voltage.
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Keywords: current sensor, negative supply, current sense amplifier, negative current monitor, current sense May 11, 2003
amp, current monitor

APPLICATION NOTE 2011
High-Side Positive Current Sensor Monitors Negative Supply

Abstract: This application note uses a high-side current-sense amplifier to monitor the current from a negative
supply voltage. The circuit uses the IC's wide common-mode input range to amplify a small Vsense signal at the
negative supply and level shift it up to a positive output voltage.


All dedicated current-sense amplifiers are designed for high-side sensing on a positive supply, but you can adapt
them to monitor a negative supply (Figur……
High-Side Positive Current Sensor Monitors Negative Supply
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