Date: 18/01/2011

High noise-immune bi-directional logic gate optocoupler for industrial communication apps

Fairchild Semiconductor has developed the FOD8012 - an industry-first, full duplex, bi-directional, logic gate optocoupler with high noise immunity and optical isolation. This bi-directional optocoupler is ideal for industrial fieldbus communications, programmable logic control, and servo control, as well as inverter, factory automation, process control and test and measurement applications.

As per Fairchild Semiconductor this optocoupler allow design engineers to design industrial communication systems to transmit high speed data over the communication fieldbus without the risk of damaging sensitive controllers, ADCs or sensors and provide reliable isolation and immunity to EMI compared to present solutions

The FOD8012 supports isolated communications of digital signals between systems without conducting ground loops or hazardous voltages. Unlike competitive devices which provide less than 0.1mm optical isolation gap, the FOD8012 features a 0.4mm (minimum) optical isolation gap for proven, reliable isolation, claims Fairchild. This device features fast switching speed up to 15Mbit/sec and achieve high common mode rejection (CMR) of 20kV/µs minimum, allowing the device to operate in noisy industrial environments.

The device is housed in a compact 8-pin small outline package. Each optocoupler channel consists of a high-speed AIGaAs LED, driven by a CMOS buffer IC coupled to a CMOS detector IC.

FOD8012 operated in extended industrial temperature range of -40 to +110ºC and a 3.3V or 5V supply voltage to facilitate logic level translation. The device's high isolation voltage is certified by UL1577 and IEC60747-5-2 for increased reliability.

Price: (each, 1k pcs.): FOD8012 = $3.08
Availability: Samples available now
Delivery: 8-10 weeks
Editorial Product Rating: ** (Average Plus)