Fastest 3,3 V optocoupler claimed

14 June 2006 Opto-Electronics

Claimed to be the industry's fastest, Avago Technologies' 3,3 V/5 V CMOS-compatible optocoupler, the ACPL-072L, is capable of transmitting data at 25 megabaud (MBd). This speed makes it ideal for high-speed, data-line transmission applications, such as those in industrial networking, including Profibus and DeviceNet, says the company. These fieldbus networks which interconnect sensors, actuators and controllers, typically need isolation at each interface location to increase data integrity and provide protection from power faults and ground-loop effects.

The high-speed optocoupler is also used in applications such as analog-to-digital conversion, digital I/O ports, computer peripheral interfaces and microprocessor system interfaces. Optocouplers separate and protect sensitive circuitry, allowing for a safe interface between high and low voltages in electronic systems.

The CMOS technology chip achieves exceptional high-speed performance and is compatible with TTL logic. The CMOS output eliminates the need for a pull-up resistor at the output stage. The ACPL-072L operates at either 3,3 V or 5 V and features 6 ns maximum pulse width distortion, which helps to maintain high data integrity over longer distances. The device exhibits high common-mode rejection of 10 kV/μs minimum, with 40 ns maximum propagation delay, and 20 ns maximum propagation delay skew over an operating temperature range of -40 to +105°C.

The ACPL-072L is supplied in the SO-8 package.

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