ADUM1285WBRZ-RL7

Overview

The ADUM1285WBRZ-RL7 is a dual-channel digital isolator from Analog Devices, utilizing magnetic coupling technology for signal transmission. It features a bidirectional data path with a maximum data rate of 25 Mb/s and a typical propagation delay of 45 ns. The device operates within a supply voltage range of 2.7 V to 5.5 V and draws a typical quiescent current of 7.7 mA per channel. It provides an isolation voltage rating of 2500 Vrms and supports an enhanced ESD performance level. The component is housed in an 8-pin SOIC package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Utilizes iCoupler magnetic coupling technology for high-speed digital signal isolation without external transformers.
• Provides bidirectional data transmission capability across two independent channels.
• Features enhanced electrostatic discharge (ESD) protection for robust operation in noisy environments.
• Includes integrated logic to ensure glitch-free output during power-up and power-down sequences.

Applications

• Automotive electronic control units requiring isolated communication interfaces
• Industrial automation systems with galvanic isolation needs
• Medical equipment requiring patient isolation barriers
• Power conversion circuits needing gate drive isolation

Procurement Notes

Verify the specific suffix 'WBRZ-RL7' against the manufacturer's official datasheet to confirm pinout compatibility and packaging type. Ensure the procurement source provides valid traceability documentation. Confirm that the component meets the required AEC-Q100 qualification status if intended for automotive use. Check for any recent product change notices that might affect lead times or material composition.

Selection Notes

Select this component when a dual-channel isolator with 25 Mbps data rate and 2500 Vrms isolation is required. Consider the 8-pin SOIC package size for board space constraints. Evaluate the 7.7 mA quiescent current consumption against system power budgets. Verify that the input/output voltage levels are compatible with the 2.7 V to 5.5 V operating range. Compare CMTI specifications if high dv/dt noise immunity is critical for the application.

Part Context

This part belongs to the ADUM1285 series of digital isolators from Analog Devices. It is designed as a cost-effective solution for replacing traditional optocouplers in applications requiring higher speed and better reliability. The series offers various channel configurations and isolation ratings to suit different interface requirements.

Replacement Considerations

Check for direct pin-to-pin replacements such as the ADUM1285WCRZ variant if package width differences are acceptable. Verify functional equivalence with other iCoupler series parts like the ADuM1250 if lower speed is sufficient. Ensure any substitute maintains the same AEC-Q100 qualification if automotive compliance is mandatory.

FAQ

What is the common-mode transient immunity (CMTI) of the ADUM1285?

The ADUM1285WBRZ-RL7 features a common-mode transient immunity of 25 kV/µs, ensuring reliable operation in high-noise environments.

Does the ADUM1285 support bidirectional data flow?

Yes, both channels of the ADUM1285 support bidirectional data transmission, allowing signals to flow in either direction across the isolation barrier.

What is the maximum operating temperature for this device?

The ADUM1285WBRZ-RL7 is rated for a maximum operating temperature of +105°C, suitable for demanding industrial and automotive environments.