Broadcom Announces Industry's Most Efficient and Robust Current Sensing Optocoupler Solution for Servo Drives and Motors

Broadcom ACPL-C799

New Optically Isolated Sigma-Delta Modulator Eliminates 75% of Shunt Resistor’s Power Losses

Broadcom Limited announced a new optically isolated sigma-delta modulator device, the Avago ACPL-C799, designed for a wide range of industrial applications including servo drives and motors. The new device features a low differential input range of ±50 mV allowing designers to reduce power dissipation across a current-sensing shunt resistor in servo drive and motor applications.

Broadcom - Avago ACPL-C799

Compared to previous generation products with an input range of ±200 mV, the ACPL-C799 enables the use of a smaller shunt resistor with one-quarter the value, thereby eliminating 75 percent (75%) of shunt resistor’s power losses. Despite the reduced input voltage range, the device delivers superb SNR, ENOB and offset drift performance, enabling a high precision motor control in space constrained, high temperature environments.

The ACPL-C799 Functional Block Diagram
The ACPL-C799 Functional Block Diagram.

Product Highlights

  • ±50 mV linear input range
    • Low power dissipation across shunt resistor
    • Extended range of current measurements
  • High performance 1-bit, 2nd order sigma-delta modulator
    • 77 dB SNR typical
    • 16-bit resolution with no missing codes (12-bit ENOB)
    • 1.3 µV/°C maximum offset drift over temperature
    • 10 MHz internal clock
  • Robust optical isolation and insulation
    • 25 kV/µs minimum common mode transient immunity (CMTI)
    • Wide creepage and clearance of 8.3 mm meeting stringent system level safety regulation
    • High reinforced insulation voltage of VIORM = 1414 VPEAK for reliable fail-safe protection in high voltage applications
    • Safety approvals from CSA, UL and IEC enabling fast system level safety clearance and time to market.
  • Compact stretched SO-8 package
  • Operating temperature from –40 °C to +105 °C

Availability

Samples and production quantities of the ACPL-C799 are now available through the Broadcom direct sales channel and via worldwide distribution partners. Please contact your local Broadcom sales representative for pricing.

You may have to register before you can post comments and get full access to forum.
EMS supplier