ADM2867EBRNZ

Overview

The ADM2867EBRNZ is a full-duplex RS-485/RS-422 transceiver featuring an integrated isoPower isolated DC-DC converter. It provides 5.7 kV RMS signal and power isolation in a single chip, eliminating the need for external isolated power supplies. The device supports data rates up to 25 Mbps with a logic supply range of 3.0 V to 5.5 V and a flexible isolated supply selectable via the VSEL pin at 3.3 V or 5.0 V. It offers ±12 kV contact and ±15 kV air IEC ESD protection on bus pins, high common-mode transient immunity of 250 kV/µs, and supports up to 192 bus nodes. The component operates within a temperature range of −40°C to +105°C.

Feature Summary

• Integrated isoPower isolated DC-DC converter eliminates external isolation power requirements
• Cable invert smart feature corrects reversed A/B/Y/Z connections while maintaining fail-safe performance
• Robust ESD protection on bus pins meets IEC 61000-4-2 standards for contact and air discharge
• Full hot swap support ensures glitch-free power-up and power-down operations

Applications

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

Procurement Notes

Verify the specific ordering suffix against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure compatibility with required safety certifications such as UL 1577 or IEC 62368-1 for the target application environment. Confirm that the selected variant matches the necessary duplex mode and data rate requirements for the system design.

Selection Notes

Select the ADM2867EBRNZ when full-duplex communication and high-speed data transfer up to 25 Mbps are required. This model is appropriate for applications needing independent driver and receiver cable inversion flexibility. Consider this part over lower-speed variants if system latency and throughput demands exceed the capabilities of 500 kbps devices.

Part Context

This component belongs to the ADM2867E/ADM2865E/ADM2863E/ADM2861E family of 5.7 kV RMS isolated RS-485 transceivers. The family differentiates by duplex mode and data rate, with the ADM2867E specifically designated for full-duplex operation at speeds up to 25 Mbps. All members share the same integrated isolation architecture and robust ESD protection features.

Replacement Considerations

The ADM2865E serves as the half-duplex counterpart within the same family, offering identical isolation and ESD characteristics but with single-directional bus communication. Designers requiring half-duplex functionality may consider this alternative while retaining the same package and isolation specifications.