ADUM3151BRSZ-RL7

Overview

The ADUM3151BRSZ-RL7 is a seven-channel SPI digital isolator from Analog Devices Inc., utilizing iCoupler magnetic coupling technology. It provides 3750Vrms isolation and supports data rates up to 34Mbps with a maximum propagation delay of 14ns. The device features a 25kV/µs common-mode transient immunity rating and operates on a 3V to 5.5V supply within a -40°C to +125°C temperature range. Packaged in a 20-SSOP, it integrates four high-speed channels for CLK, MOSI, MISO, and SS signals alongside three lower-speed control channels.

Feature Summary

• Optimized for isolated serial peripheral interface (SPI) communication systems
• Integrates four high-speed signal channels with low propagation delay and jitter
• Includes three additional channels for status and control signals
• Provides robust common-mode transient immunity for noisy environments

Applications

• Distributed control systems in industrial automation
• Programmable logic controllers
• Sensor monitoring applications
• Motor control systems

Procurement Notes

Verify the specific suffix 'BRSZ' against official datasheets to confirm the 34Mbps speed grade, as other variants like 'ARSZ' differ significantly. Ensure the reel packaging matches production requirements. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance status through current documentation.

Selection Notes

Select this component when high-speed SPI isolation is required within a compact footprint. It replaces discrete solutions by integrating necessary control lines. Consider the 3750Vrms isolation rating for safety requirements. Evaluate the 20-SSOP package constraints against board space limitations. Compare performance metrics against alternative isolators for system optimization.

Part Context

This device belongs to the ADuM315x SPIsolator series, designed to replace optocouplers in SPI interfaces. It offers significant size and cost reductions compared to traditional discrete isolation solutions. The series leverages established iCoupler technology to provide reliable signal transmission across isolation barriers while maintaining high data throughput.

Replacement Considerations

Public confirmed substitute part numbers include ADUM3151ARSZ and ADUM3151BRSZ. Verify functional equivalence regarding channel count and speed grades before substitution.