ADM2561EBRNZ-RL7

Overview

The ADM2561EBRNZ-RL7 is a 3 kV RMS signal and power isolated RS-485 transceiver manufactured by Analog Devices Inc. It operates with a VCC supply of 3 V to 5.5 V and a logic VIO supply of 1.7 V to 5.5 V. The device supports a maximum data rate of 500 kbps and features an integrated low EMI isolated DC-to-DC converter. It provides ±15 kV IEC air discharge ESD protection on the A, B, Y, and Z pins. The component is housed in a 28-lead SOIC_W package (SOIC-28) and functions within a temperature range of -40°C to +105°C.

Feature Summary

• Integrated isolated DC-to-DC converter eliminates the need for external isolation power supplies.
• Cable invert feature allows correction of reversed cable connections while maintaining receiver fail-safe performance.
• High common-mode transient immunity of 250 kV/µs ensures robust operation in noisy environments.
• Passes EN 55032 Class B radiated emissions testing with margin on a standard two-layer PCB.

Applications

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

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to the required reel packaging configuration before procurement. Confirm that the VSEL pin is correctly configured for the desired isolated supply voltage level based on the system's VCC requirements. Ensure proper decoupling capacitors are included in the design as specified in the datasheet recommendations.

Selection Notes

Select this component when a half-duplex RS-485 interface requires 3 kV RMS isolation and high ESD protection. It is suitable for applications where low radiated emissions are critical. Consider the 500 kbps data rate limit compared to higher-speed variants if long cable runs or EMI control are primary concerns. Verify compatibility with the target logic voltage levels via the VIO supply pin.

Part Context

This part belongs to the ADM2561E/ADM2563E/ADM2565E/ADM2567E family of isolated RS-485 transceivers. The ADM2561E specifically denotes the half-duplex variant with a 500 kbps data rate. Other family members offer different duplex modes or higher data rates up to 25 Mbps. All share the same 28-lead SOIC_W package and isolation architecture.

Replacement Considerations

ADM2563EBRNZ-RL7: Full-duplex variant with identical speed and isolation ratings. ADM2565EBRNZ-RL7: Half-duplex variant with 25 Mbps data rate. ADM2567EBRNZ-RL7: Full-duplex variant with 25 Mbps data rate. These parts share the same package and isolation specifications but differ in duplex mode and speed capabilities.