Mixed Signal/Analog

LVDS digital isolators offer 600Mb/s data throughput

11th February 2016
Nat Bowers

Delivering data throughput rates of 600Mb/s (up to four times faster than competing digital isolators), Analog Devices has introduced an LVDS digital isolator series. The ADN465x series ensures safety and reliability through proven galvanic isolation in a single package while delivering ultralow jitter at 70ps and 4.5ns max propagation delay.

The LVDS digital isolator series is designed to improve performance, reliability and power consumption in industrial instrumentation and PLC applications that previously required redesign of the interface to support LVDS signal isolation. With ADN465x devices, high-speed serial LVDS signals can now be directly isolated without needing to deserialise as compared to previous custom implementations. Design resources and time are saved by offering an off-the-shelf, high-performance, LVDS-compatible solution.

In industrial PLC backplanes, data generated from an increasing number of sensors is distributed between processing nodes for improved control, while also maintaining robustness to interference for system dependability. With ultra-low jitter of 70ps, full compliance to the TIA/EIA‑644‑A standard, reinforced insulation with surge protection tested at 10kVpk, and the ability to withstand voltage ratings up to 5kVrms, the LVDS digital isolators enable advanced I/O extension integration across meters of cable at high signal rates.

Real time analysis of grid supply is paramount as server farm density increases to support the ever-increasing rise in consumption. Smart power quality analysers that enable real-time analysis require precise data at high speeds. In addition to supporting up to 600Mb/s data rates, ADN465x LVDS digital isolators support 300MHz clocks to enable isolation of precision converters with LVDS interfaces. Source synchronous interfaces are supported with low channel-to-channel skew of 200ps. Ultra-low additive phase jitter of 380fs enables ADC sampling clocks to be isolated while maintaining low aperture jitter for full ADC performance and resolution.

Supplied in 20-lead SOIC-W packages, the ADN4650 and ADN4651 are available now (the ADN4652 will be available in April 2016) priced at $5.50 each in 1,000 unit quantities.

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