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Optically isolated modulator gauges motor phase current

Posted: 04 Dec 2008 ?? ?Print Version ?Bookmark and Share

Keywords:modulator sigma-delta? power inverter? CMOS?

Avago Technologies has developed an optically isolated sigma-delta modulator that uses an external clock to provide direct measurement of motor phase currents in power inverters.

Based on an advanced low-power CMOS process, the ACPL-796J uses an external clock that allows synchronized data conversion between the current sensor and controller to help motor control designers eliminate complex design processes in data and clock reading. The ACPL-796J is designed with digital inputs and outputs compatible with systems powered by 5V or 3V supplies and works under a wide industrial temperature range.

The sigma-delta modulator costs $6 each in 10,000-unit quantities, and is available in sample and production quantities.

- Ismini Scouras

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