Current sensing optocoupler is for servo drives and motors

Optically isolated sigma-delta modulators from Broadcom eliminate 75 per cent of a shunt resistor’s power losses.

The Avago ACPL-C799 is designed for industrial applications, including servo drives and motors. It has a low differential input range of ±50mV to allow designers to reduce power dissipation across a current-sensing shunt resistor in servo drive and motor applications.

Compared to previous generation products with an input range of ±200 mV, the optocoupler enables the use of a smaller shunt resistor with one-quarter the value, accounting for the shunt resistor’s power losses. Despite the reduced input voltage range, the SNR, ENOB and offset drift performance enables a high precision motor control in space constrained, high temperature environments, says the company.

It meets safety approvals from CSA, UL and IEC and is available in a compact, stretched SO-8 package. Operating temperature is from -40 to +105 degree C.

Samples and production quantities are available now.

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