Avago Technologies has developed low power optocouplers. Utilising an integrated circuit design and thick insulation material, the ACPL-M61L/061L/064L/W61L/K64L optocouplers offer reduction in power requirements without compromising isolation and insulation performance. These digital optocouplers also provide better high voltage performance and are suitable for reinforced applications. The optocouplers are suitable for designers of communication interfaces (RS485, CANBus and I2C), microprocessor system interfaces and digital isolation for A/D, D/A conversion applications.
The 10MBd digital optocouplers combine a high efficiency LED (light emitting diode) and an integrated high gain photo detector, which results in low forward drive current (1.6mA) that enables designers to interface the optocoupler input directly from the microcontroller output, eliminating the use of buffers to drive the LED. The use of the LED input with a Faraday shielded photodetector circuit enables an application level common mode noise immunity of 35kV/µs. The optocouplers support 3.3 and 5V supply voltages, and are suitable for industrial temperatures ranging from -40 to +105°C.
The devices integrate a feature similar to 'under voltage lock-out' that prevents output disruption during power supply loss or system recovery. 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.
