The Si8710, Si8711, Si8712 CMOS-based isolators use capacitive isolation technology, but emulate a photo diode input for pin compatability with opto-isolators. The low-cost chips provide more than ten times MTTF rate of optocouplers with isolation ratings up to 5 kV and full compliance with IEC 60747-5-2, including 10 kV surge protection.
The single channel devices offer common-mode transient immunity of >50 kV/μs typical. Input on current is 15 ma max, 3 ma min and they operate at -40 to 125C. Maximium data rate is 15 Mbits/s. The three versions have open collector outputs, with enable, and with 20 K pull up. An eval kit is available for $29. ($0.43 ea/10,000 – available now.)
by Jim Harrison
Silicon Laboratories , Austin , TX
Information 512-416-8500
www.silabs.com
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