ADUM3153BRSZ

Overview

The ADUM3153BRSZ is a seven-channel digital isolator from Analog Devices, designed for SPI interface applications. It utilizes magnetic coupling technology to provide electrical isolation with a rated insulation voltage of 3750 Vrms. The device supports bidirectional data transmission at a maximum data rate of 250 kb/s and features a typical propagation delay of 14 ns. It operates within a supply voltage range of 3 V to 5.5 V and functions reliably across an industrial temperature range of -40°C to +125°C. Housed in a compact SSOP-20 package, it integrates multiple channels into a single component.

Feature Summary

• Integrates seven isolated channels optimized for serial peripheral interface (SPI) communication protocols.
• Employs iCoupler magnetic coupling technology to achieve high common-mode transient immunity without optical components.
• Supports bidirectional signal transmission, allowing flexible configuration for both input and output directions.

Applications

• Isolation for distributed control systems in industrial automation environments
• Signal isolation in programmable logic controllers (PLCs)
• Sensor monitoring interfaces requiring galvanic isolation

Procurement Notes

Verify the specific suffix BRSZ to confirm bidirectional channel configuration and SSOP-20 packaging. Ensure compatibility with system voltage levels between 3 V and 5.5 V. Check datasheet for moisture sensitivity classification and reflow soldering profiles. Confirm that the 3750 Vrms isolation rating meets safety standards for the target application environment.

Selection Notes

Select this component when bidirectional SPI isolation is required within a single package. Compare against unidirectional variants like the ADUM3153ARSZ if directionality constraints exist. Consider the 250 kb/s data rate limit for high-speed requirements; higher speed options may require different series members. Evaluate thermal performance within the specified operating temperature range during design integration.

Part Context

This part belongs to the ADuM315x SPIsolator family, which provides integrated solutions for isolating SPI buses. The family replaces discrete optocoupler designs by combining multiple channels in one package. This specific model focuses on bidirectional capability, distinguishing it from unidirectional counterparts in the same series.

Replacement Considerations

The ADUM3153ARSZ serves as a direct alternative but offers unidirectional channels instead of bidirectional ones. Verify channel directionality requirements before substitution. Other family members may offer different data rates or isolation ratings but might not match the exact pinout or functional configuration.