ADUM3151BRSZ

Overview

The ADUM3151BRSZ is a seven-channel digital isolator from the SPIsolator series, designed for isolated serial peripheral interface (SPI) communication. It utilizes iCoupler magnetic coupling technology to provide electrical isolation between circuits. The device features a unidirectional channel configuration with five input channels and two output channels. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 34 Mbps. Key electrical specifications include an insulation voltage of 3750 Vrms, a common-mode transient immunity of 25 kV/µs, and a maximum propagation delay of 14 ns. The component functions reliably across an industrial temperature range of -40°C to +125°C.

Feature Summary

• Optimized for high-speed SPI communication systems with low propagation delay and jitter characteristics.
• Integrates multiple signal paths into a single package to simplify design compared to discrete solutions.
• Provides robust galvanic isolation using proprietary magnetic coupling technology.

Applications

• Distributed control systems in industrial automation
• Sensor monitoring interfaces
• Motor control applications

Procurement Notes

Verify current availability status as supply may be limited or subject to factory special orders. Confirm that the SSOP-20 package matches your PCB footprint requirements. Ensure the 3750 Vrms isolation rating meets your system safety standards. Check humidity sensitivity classification for proper storage and reflow soldering profiles.

Selection Notes

Select this component when designing isolated SPI links requiring high data throughput and compact form factors. The seven-channel architecture allows integration of clock, data, and control signals in one unit. Consider the 3 V to 5.5 V operating range for compatibility with standard logic levels. Evaluate the thermal performance within the specified -40°C to +125°C range for your environment.

Part Context

This part belongs to the ADuM315x family of SPIsolator digital isolators. The series is engineered to replace optocouplers and traditional digital isolators by offering significantly smaller size and lower cost while supporting higher clock rates. The technology leverages Analog Devices' established iCoupler platform, which has achieved substantial market volume.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and functional equivalence if considering alternative manufacturers.