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Isolation amplifiers come in compact package

Posted: 16 Jan 2009     Print Version  Bookmark and Share

Keywords:isolation amplifiers  short circuit  overload detection 

From Avago Technologies comes a new series of competitively priced isolation amplifiers with short circuit and overload detection.

Based on optical insulation technology and sigma-delta modulation for signal processing, Avago's ACPL-785J isolation amplifiers allow direct measurement of motor phase currents in power inverters. Typical applications include inverter current sensing, motor phase and rail current sensing, switching power supply signal isolation, industrial A/D converters and general-purpose current sensing and monitoring.

Motor control power stages require a combination of current sensing and power device protection to achieve accurate fail-safe motor operation. These current sensors, which feedback the motor phase or rail current to the microcontroller, are typically optimised for accuracy to provide precise control. Once a fault condition has been detected, the power device circuitry shuts off the device to prevent destruction of the power device and load.

Avago's ACPL-785J series of isolation amplifiers come in a compact small outline-16 (SO-16) package with a footprint that is 10.3 mm (L) by 10.2 mm (W) by 3.5 mm (H).

Pricing: Rs.162.62 ($3.25) in 10,000 piece quantities.

-Ismini Scouras

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