ADUM1285WARZ

Overview

The ADUM1285WARZ is a dual-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It provides bidirectional data transmission with a maximum data rate of 100 Mb/s and an isolation voltage of 3000 Vrms. The device operates within a supply voltage range of 3.135 V to 5.5 V, consuming typical power supply currents of 20 mA per channel at high speeds. Key electrical parameters include a propagation delay of 24 ns, a common-mode transient immunity of 25 kV/µs, and a pulse width distortion of 10 ns. It supports an operating temperature range from -40°C to +125°C and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Bidirectional signal transmission capability across two independent channels
• High-speed data processing with 100 Mb/s throughput
• Robust noise immunity via 25 kV/µs common-mode transient rejection
• Automotive-grade qualification ensuring reliability in harsh environments

Applications

• Isolated gate driver circuits for power electronics
• Industrial communication bus interfaces such as CAN and LIN
• Medical equipment requiring galvanic isolation
• Automotive sensor interface modules

Procurement Notes

Verify the specific suffix WARZ indicates tube packaging rather than reel configuration when sourcing components. Confirm that the AEC-Q100 qualification status aligns with automotive project requirements. Ensure the bidirectional polarity matches the circuit design needs, as opposed to unidirectional variants. Cross-reference the SOIC-8 package dimensions against PCB footprint specifications to guarantee mechanical compatibility during assembly.

Selection Notes

Select this component when bidirectional data flow is required between isolated domains. The 100 Mb/s speed rating suits high-bandwidth applications compared to slower 1 Mb/s alternatives. Consider the 3000 Vrms isolation barrier for safety-critical systems. Evaluate the 20 mA current consumption against power budget constraints, noting it is higher than low-speed variants. Verify thermal performance within the specified -40°C to +125°C operational window.

Part Context

This part belongs to the ADUM1285 series of dual-channel digital isolators. It shares the same core architecture and pinout as the ADUM1285ARZ but differs in polarity and packaging. While the ARZ variant offers unidirectional channels in a tube, the WARZ provides bidirectional functionality. Both utilize the same SOIC-8 package and magnetic coupling technology, maintaining consistency in physical integration while offering distinct logical directionality options.

Replacement Considerations

The ADUM1285ARZ serves as a direct functional substitute if unidirectional channels are acceptable. For reel-packaged versions of the same bidirectional specification, consider the ADUM1285WCRZ-RL7. Ensure any replacement maintains the 3000 Vrms isolation rating and AEC-Q100 qualification if automotive compliance is mandatory.