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Avago Technologies has developed a family of ultra-low-power optocouplers that it claims will pave the way for optical isolators that can operate on 90 per cent less power than today’s optocouplers.

Utilising an integrated circuit design and thick insulation material, Avago’s ACPL-M61L/061L/064L/W61L/K64L optocouplers are said to offer a reduction in power requirements without compromising isolation and insulation performance.

These digital optocouplers also provide good high-voltage performance over the lifetime of the product while meeting the requirements of safe insulation for reinforced applications.

The optocoupler family is targeted at designers of communication interfaces (RS485, CANBus, and I2C), microprocessor system interfaces, and digital isolation for A/D, D/A conversion applications.

Avago’s ultra-low-power 10MBd digital optocouplers combine a high-efficiency light-emitting diode (LED) and an integrated high-gain photo detector, which results in low forward-drive current (1.6mA) that will enable designers to interface the optocoupler input directly from the microcontroller output – eliminating the use of buffers to drive the LED.

Moreover, the use of the LED input with a faraday-shielded photodetector circuit enables good application level common mode noise immunity (35kV/us typical).

This optocoupler family supports both 3.3V and 5V supply voltages, and provides reliable system performance in industrial temperatures ranging from -40C to +105C.

The ACPL-M61L/061L/064L/W61L/K64L family integrates a feature similar to ‘under-voltage lock-out’ that prevents output disruption during a power supply loss or system recovery.

Additionally, the output of these optocouplers is designed with a slew-rate controlled feature to allow the voltage rise and fall times to be controlled over a range of load capacitances.

Avago Technologies

Avago Technologies is a leading supplier of analogue interface components for communications, industrial and consumer applications. By leveraging its core competencies in III-V compound and silicon semiconductor design and processing, the company provides an extensive range of analog, mixed signal and optoelectronics components and subsystems to approximately 40,000 end customers.

Backed by strong customer service support, the company's products serve four diverse end markets: industrial and automotive electronics, wired infrastructure, wireless communications, and consumer and computer peripherals. Avago has a global employee presence and heritage of technical innovation dating back 40 years to its Hewlett-Packard roots. Information about Avago is available on its website.

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