Current and voltage chip takes the hard work out of isolated mains measurements

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Allegro MicroSystems has integrated power, voltage and current monitoring into a single chip with reinforced isolation. Only a handful of resistors are needed to complete the high-voltage interface (diagram right). Called ACS37800, it uses a Hall effect scheme to measure current and external resistors to stand-off the voltage measurement – no opto-isolators, Rogowski coils, current transformers, isolated operational …

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