ADUM1251ARZ-RL7

Overview

The ADUM1251ARZ-RL7 is a hot-swappable digital isolator featuring two non-latching, bidirectional communication channels compatible with I²C interfaces. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 1 Mbps. The device provides an isolation voltage of 2500 Vrms and exhibits a common-mode transient immunity of 25 kV/µs. Packaged in an 8-pin SOIC, it functions across a temperature range of -40°C to +105°C.

Feature Summary

• Hot-swappable design prevents data faults during insertion into active buses without power.
• Non-latching bidirectional channels eliminate the need for separate transmit and receive signal splitting.
• Integrated open-drain interface with 30 mA sink current capability.

Applications

• Isolated I²C, SMBus, or PMBus interfaces
• Multi-master I²C interfaces
• Battery management solutions (BMS)
• Industrial automation and motor control

Procurement Notes

Verify the specific suffix 'RL7' indicates reel packaging when ordering. Confirm that the 8-SOIC package matches your PCB footprint requirements. Ensure the 2500 Vrms isolation rating meets your system's safety standards. Check for RoHS compliance status if required by your manufacturing process.

Selection Notes

Select this component for applications requiring bidirectional I²C isolation with hot-swap protection. Compare against ADUM1250 if unidirectional channels are sufficient. Consider the 1 Mbps data rate limit for high-speed bus requirements. Verify that the 3 V to 5.5 V supply range aligns with your system's voltage rails.

Part Context

This part belongs to the ADuM1250/ADuM1251 series of iCoupler digital isolators. These devices utilize magnetic coupling technology to provide electrical isolation between circuits. The series is designed specifically for I²C compatibility, offering a compact alternative to optical couplers in space-constrained designs.

Replacement Considerations

The ADUM1250ARZ-RL7 is a related variant within the same family. Note that the ADUM1250 typically features unidirectional channels, whereas the ADUM1251 provides bidirectional functionality. Verify channel directionality requirements before substitution.

FAQ

Does the ADUM1251 support hot-swapping on live buses?

Yes, the device includes dedicated hot-swap circuitry to prevent data faults when inserting a powered-down card into an active bus.

What is the maximum data rate supported?

The ADUM1251 supports a maximum data rate of 1 Mbps.