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Digital Isolators Boost Clock Speed Sixfold For SPI Communications

June 26, 2014
According to Analog Devices (ADI), its ADuM315x SPIsolator digital isolator family is over six times faster, over 80% smaller, and cost up to 85% less than competing optocoupler- or digital-isolator-based solution for serial peripheral interface (SPI) communications systems.

According to Analog Devices (ADI), its ADuM315x SPIsolator digital isolator family is over six times faster, over 80% smaller, and cost up to 85% less than competing optocoupler- or digital-isolator-based solution for serial peripheral interface (SPI) communications systems. Based on the company iCoupler digital isolator technology, the devices support up to 40-MHz SPI speeds due to low propagation delay and jitter in the CLK, MO-SI, MI-SO, and SS channels. The isolators support the maximum sample rate for certain ADI 12-, 16-, and 19-bit precision analog-to-digital converters. Along with commonly required low-speed status and control signals, the devices integrate high-level functionality to help simplify isolation of high-speed SPI signals. The family’s 3.75-kV rms isolation rating will be followed by devices rated to 5 kV rms later this year. SPI communications applications include distributed control systems, programmable logic controllers, and sensor monitors for industrial automation, instrumentation equipment, and motor control

ANALOG DEVICES INC.

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