5 kV, 7-Channel, SPIsolator Multiple Peripheral, Digital Isolator for SPI

The ADuM41541 is an SPIsolator™ digital isolator optimized for a serial peripheral interface (SPI) that includes support for up to four peripheral 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 17 MHz.

The ADuM4154 isolator also provides a peripheral select multiplexing system that allows up to four peripheral devices to be serviced from one isolator. When a target peripheral is selected, the peripheral select signal propagates to the desired output with low propagation delay, allowing tight timing control. The isolated SSx is addressed through a 250 kbps low speed, 2-channel address bus, allowing the target peripheral device to be changed in as little as 2.5 μs.

Applications

* Industrial programmable logic controllers (PLCs)

* Sensor isolation

* Supports up to 17 MHz SPI clock speed

* 4 high speed, low propagation delay, SPI signal isolation channels

* Supports up to 4 peripheral devices

* 20-lead SOICIC package with 8.3 mm creepage

* High temperature operation: 125°C

* High common-mode transient immunity: >25 kV/μs

* Safety and regulatory approvals

* UL 1577

* VISO = 5000 V rms for 1 minute

* IEC/EN/CSA 62368-1

* IEC/CSA 60601-1

* IEC/CSA 61010-1

* DIN EN IEC 60747-17 (VDE 0884-17)

* VIORM = 645 V peak