ADM2761EBRWZ

Overview

The ADM2761EBRWZ is a half-duplex, signal-isolated RS-485 transceiver manufactured by Analog Devices Inc. It provides a 5.7 kV RMS isolation barrier and supports data rates up to 500 kbps. The primary side power supply (VDD1) operates from 1.7 V to 5.5 V, while the isolated secondary side (VDD2) requires 3.0 V to 5.5 V. The device features ±15 kV IEC ESD protection on bus pins, high common-mode transient immunity exceeding 250 kV/µs, and operates within a temperature range of -40°C to +125°C. It is housed in a 16-lead wide-body SOIC package with 8.2 mm creepage and clearance.

Feature Summary

• Provides robust system-level electromagnetic compatibility (EMC) immunity through a 5.7 kV RMS signal isolation barrier.
• Features integrated electrostatic discharge (ESD) protection rated at ≥±15 kV air discharge and ≥±12 kV contact discharge on all bus pins.
• Passes EN 55032 Class B radiated emissions testing with margin on standard two-layer printed circuit boards.
• Supports full hot swap operations with glitch-free power-up and power-down capabilities.

Applications

• Solar inverters
• Electrical test and measurement equipment
• Heating, ventilation, and air conditioning (HVAC) networks
• Industrial field buses
• Building automation systems

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel specifications. Ensure that the component meets the required safety certifications for your target market, as regulatory approvals may be pending or vary by region. Confirm insulation ratings align with your system's working voltage requirements before finalizing procurement.

Selection Notes

Select this component when high working voltages and robust EMC performance are critical. The flexible 1.7 V to 5.5 V primary supply allows easy integration with various logic families. The high differential output voltage makes it suitable for PROFIBUS applications. Consider the ADM2763E variant if receiver cable inversion functionality is required for correcting reversed A and B bus connections.

Part Context

The ADM2761EBRWZ belongs to the ADM2761E/ADM2763E family of isolated RS-485 transceivers designed for harsh industrial environments. These devices utilize a proprietary low-power digital isolator architecture with coplanar transformer coils to minimize radiation emissions. They are optimized for long cable runs at lower data rates, offering superior noise immunity compared to standard non-isolated transceivers.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and isolation voltage ratings carefully when considering alternative components from other manufacturers.