The ADUM3154 series 7-channel SPIsolator™ Digital Isolator optimized for a serial peripheral interface (SPI) that includes support for up to four slave devices. Based on the Analog Devices, Inc., iCoupler® chip scale transformer technology, the low propagation delay and jitter in the CLK, MO/SI, MI/SO and SS SPI bus signals support SPI clock rates of up to 17MHz. The ADuM3154 isolator also provides a slave select multiplexing system that allows up to four slave devices to be serviced from one isolator. When a target slave is selected, the slave select signal propagates to the desired output with low propagation delay, allowing tight timing control. The isolated SSx is addressed through a 250kbps low speed, 2-channel address bus, allowing the target slave device to be changed in as little as 2.5µs.
● Supports up to 17MHz SPI clock speed
● 4 High speed, low propagation delay, SPI signal isolation channels
● Supports up to 4 slave devices
● >25kV/µs High common-mode transient immunity
