The LTM2881CY-5#PBF is a high-performance isolated RS485/RS422 µModule transceiver from Linear Technology, designed to provide robust communication in noisy environments. This device integrates a complete isolated data interface with dual-channel CMOS isolators, power transformer driver, and an LDO regulator, all encapsulated within a compact, surface-mount BGA package.

Key Features

• Integrated Isolation: The LTM2881CY-5#PBF offers 2500V₁RMS of galvanic isolation between the logic and bus sides, which is certified by UL, CSA, and VDE, ensuring protection against high voltage spikes and ground loops.
• Robust Data Transmission: With support for RS485 and RS422 protocols, the device provides reliable data transmission at rates up to 20Mbps, even in the presence of common-mode noise and long cable runs.
• Power Supply Flexibility: An integrated, low-EMI, DC/DC converter powers the isolation barrier, which allows for a single 3.3V or 5V supply on the logic side. This simplifies power supply design and reduces component count.
• Fail-Safe Features: Built-in fail-safe circuitry ensures a logic-high receiver output when inputs are shorted or open, enhancing system reliability.
• Thermal Protection: The device includes an over-temperature shutdown feature that protects the IC under abnormal thermal conditions.
• Compact and Robust Design: The LTM2881CY-5#PBF's BGA package is suitable for space-constrained applications, and its rugged design ensures performance in industrial temperature ranges from -40°C to 105°C.

Applications

The LTM2881CY-5#PBF is ideal for a variety of applications where isolation is critical. Typical uses include:

• Industrial field buses
• Instrumentation
• Medical equipment
• Ground loop elimination
• Noise-immune communication

Summary

The LTM2881CY-5#PBF from Linear Technology offers a complete and reliable isolated RS485/RS422 transceiver solution, ensuring safe and noise-resistant data communication in challenging environments. Its integrated features and compact design make it an excellent choice for designers seeking to enhance the robustness and reliability of their industrial, medical, or instrumentation interfaces.