ADUM1285BRZ

Overview

The ADUM1285BRZ is a dual-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It provides 3000 Vrms isolation voltage and supports data rates up to 25 Mb/s with a typical propagation delay of 23 ns. The device operates on a single supply voltage ranging from 3.135 V to 5.5 V, drawing approximately 4.8 mA or 6.2 mA per channel depending on the state. It features a default low output configuration and offers high common-mode transient immunity (CMTI). Packaged in an 8-pin SOIC, it functions within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates two independent unidirectional channels for signal isolation using proprietary magnetic coupling technology.
• Provides robust protection against high-voltage transients with 3000 Vrms insulation strength.
• Ensures signal integrity in noisy environments through high common-mode transient immunity capabilities.

Applications

• General-purpose digital signal isolation between microcontrollers and peripheral devices
• Isolation in industrial communication buses such as RS-485 and CAN
• Protecting sensitive control circuits in power conversion systems

Procurement Notes

Verify the specific suffix BRZ against official Analog Devices documentation to confirm package type and lead-free status. Ensure compatibility with system voltage requirements and thermal management needs. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Confirm that the default low output behavior aligns with the application's initial state requirements before finalizing procurement.

Selection Notes

Select this component when dual-channel isolation is required with moderate data rates up to 25 Mb/s. Consider the 8-SOIC package for surface-mount applications where space is limited but thermal performance is manageable. Evaluate the 3000 Vrms rating against the system's isolation voltage requirements. Compare power consumption figures if battery-operated constraints exist, noting the current draw varies by channel activity.

Part Context

The ADUM1285BRZ belongs to the ADUM128x series of iCoupler digital isolators. This family leverages silicon dioxide insulation layers and transformer-based coupling to replace traditional optocouplers. The series offers advantages in size, speed, and reliability compared to legacy isolation technologies, making it suitable for modern embedded systems requiring galvanic isolation.

Replacement Considerations

The ADUM1285ARZ is a verified alternative within the same series, offering identical electrical specifications and functionality. Both parts share the same pinout and package dimensions, allowing for direct substitution in most designs without schematic modifications. Verify that any replacement matches the specific suffix requirements for packaging and compliance standards.