ADUM1285ARZ

Overview

The ADUM1285ARZ is a dual-channel digital isolator utilizing iCoupler magnetic coupling technology. It provides 3000 Vrms isolation voltage with a common-mode transient immunity of 25 kV/µs. The device supports data rates up to 1 Mbps and operates within a supply voltage range of 3.135 V to 5.5 V. Typical propagation delays are 23 ns, with rise and fall times of approximately 3 ns. It functions in unidirectional mode with default low outputs, housed in an 8-SOIC package, and operates between -40°C and +125°C.

Feature Summary

• Integrates two independent channels using monolithic air core transformer technology for galvanic isolation.
• Provides high common-mode transient immunity to reject noise spikes across the isolation barrier.
• Features default low output logic states to ensure defined signal levels during power-up or fault conditions.

Applications

• Industrial process control systems requiring isolated sensor interfaces
• Medical equipment needing patient isolation barriers
• Power electronics monitoring circuits

Procurement Notes

Verify the specific suffix 'ARZ' confirms RoHS compliance and lead-free status as per manufacturer specifications. Confirm the SOIC-8 package dimensions match your PCB footprint requirements. Ensure the unidirectional channel configuration aligns with your circuit design needs. Check current availability status through authorized distributors as supply constraints may apply.

Selection Notes

Select this component when bidirectional communication is not required, as it supports only unidirectional data flow. Choose based on the 1 Mbps data rate capability and 3000 Vrms isolation rating. Consider the default low output feature if system safety requires inactive lines to remain low. Verify that the 8-SOIC package fits the available board space.

Part Context

This part belongs to the ADuM128x series of dual-channel digital isolators from Analog Devices. It shares the iCoupler architecture with other variants but differs in data rate and directionality. It serves as a general-purpose isolation solution for applications prioritizing cost-effectiveness over higher speed performance found in the ADuM1281 series.

Replacement Considerations

The ADUM1281BRZ offers similar isolation but supports 25 Mb/s data rates. The ADUM1250ARZ-RL7 provides bidirectional functionality suitable for I2C buses. Verify pinout compatibility and electrical parameters before substituting.