ADM2761EBRWZ-RL7

Overview

The ADM2761EBRWZ-RL7 is a half-duplex RS-485 transceiver manufactured by Analog Devices Inc. It features a 5.7 kV RMS signal isolation barrier and supports data rates up to 500 kbps. The device operates with a primary supply voltage (VDD1) ranging from 1.7 V to 5.5 V and an isolated secondary supply (VDD2) from 3.0 V to 5.5 V. It provides ±15 kV IEC ESD protection on the bus pins, high common-mode transient immunity exceeding 250 kV/µs, and passes EN 55032 Class B radiated emissions testing. The component is housed in a 16-lead wide-body SOIC package.

Feature Summary

• Provides robust galvanic isolation for system-level EMC immunity
• Includes integrated ESD protection on all bus interface pins
• Optimized for low-speed communication over extended cable lengths
• Supports full hot swap operations during power transitions

Applications

• Solar inverters
• Electrical test and measurement equipment
• HVAC networks
• Industrial field buses
• Building automation systems

Procurement Notes

Verify the specific ordering suffix RL7 to confirm reel packaging configuration. Ensure the procurement documentation matches the exact part number ADM2761EBRWZ-RL7 to guarantee correct pinout and isolation specifications. Cross-reference the manufacturer's latest datasheet revision for any updates to safety certifications or regulatory approvals before finalizing orders.

Selection Notes

Select this component when designing systems requiring high working voltages and strict electromagnetic compatibility standards. The flexible dual-supply architecture accommodates various logic levels on the primary side while maintaining a stable isolated bus interface. Consider the 500 kbps maximum rate and the specific creepage requirements of the wide-body package for PCB layout constraints.

Part Context

This model belongs to the ADM2761E/ADM2763E family of isolated RS-485 transceivers. The 'B' indicates the wide-body SOIC package variant, while 'WZ' denotes the specific tape and reel packaging format. The 'RL7' suffix specifies the reel quantity and handling method. This series is designed to replace standard non-isolated transceivers in noisy industrial environments.

Replacement Considerations

Direct functional replacements within the same isolation class include the ADM2763E for full-duplex applications or the ADM2495E for lower isolation ratings. Verify that substitute components maintain the required 5.7 kV RMS isolation barrier and compatible 16-lead SOIC_W footprint to ensure mechanical interchangeability without redesigning the PCB.

FAQ

Does the ADM2761EBRWZ-RL7 support PROFIBUS communication?

Yes, the device is PROFIBUS compliant when powered with 5 V on the VDD2 supply, meeting the minimum differential output voltage requirements.

What is the maximum operating temperature range?

The device supports a wide operating temperature range from -40°C to +125°C.

How does the device handle reversed cable connections?

The ADM2761E does not have a cable inversion feature; however, the related ADM2763E model includes an INVR pin to correct reversed A and B bus connections while maintaining fail-safe performance.