ADM2861EBRNZ-RL7

Overview

The ADM2861EBRNZ-RL7 is a half-duplex RS-485 transceiver featuring 5.7 kV RMS signal and power isolation with an integrated isolated DC-to-DC converter. It supports a maximum data rate of 500 kbps and operates on a VCC supply of 3 V to 5.5 V and a VIO logic supply of 1.7 V to 5.5 V. The device provides ±15 kV IEC air discharge ESD protection on the A, B, Y, and Z pins. It utilizes a 28-lead SOIC_W package with over 8.0 mm creepage and clearance distances.

Feature Summary

• Integrated isolated DC-to-DC converter eliminates external isolated power supply requirements
• Cable invert feature corrects reversed cable connections while maintaining receiver fail-safe performance
• High common-mode transient immunity of 250 kV/µs for robust noise rejection
• Passes EN 55032 Class B radiated emissions testing with margin on a 2-layer PCB

Applications

• Heating, ventilation, and air conditioning (HVAC) networks
• Industrial field buses
• Building automation systems
• Utility networks
• Energy meters

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when sourcing components. Confirm that the ordering part number matches the exact isolation voltage and data rate requirements for the target application. Ensure compatibility with the required logic supply voltages before finalizing procurement decisions.

Selection Notes

Select this component for applications requiring high isolation voltage and low electromagnetic interference. The 500 kbps data rate is optimized for long cable runs where EMI control is critical. Verify that the system design accommodates the flexible VIO supply range and the specific pin configuration differences between full-duplex and half-duplex variants in the family.

Part Context

This device belongs to the ADM286xE family of isolated RS-485 transceivers from Analog Devices. It shares the same isolation architecture and regulatory approvals as higher-speed variants like the ADM2865E but is specifically slew-rate limited to 500 kbps. This limitation reduces radiated emissions, making it suitable for strict EMC environments compared to the 25 Mbps versions.

Replacement Considerations

ADM2863EBRNZ-RL7 is a full-duplex variant within the same family offering similar isolation and ESD protection characteristics.