LTC2877IMSE#PBF

LTC2877IMSE#PBF Application Field and Working Principle

The LTC2877 family of transceivers from Linear Technology provides a universal serial interface for Enhanced I2C/SMBus and SPI communication. The LTC2877IMSE#PBF is a transceiver designed for remote node applications that require robust isolation and a wide common mode voltage swing range. The device integrates signal and power isolation between its dedicated inputs/outputs and its internal logic/registers, supporting both SPI and Enhanced I2C/SMBus communication.

Overview

The LTC2877IMSE#PBF is a family of isolated transceiver IP blocks designed for remote node applications that require robust isolation and a wide common mode voltage swing range. The device integrates signal and power isolation between its dedicated inputs/outputs and its internal logic/registers, supporting both SPI and Enhanced I2C/SMBus communication. It offers dual port IO, allowing two different boards to communicate with each other. The device also offers integrated protection from reverse polarity, overvoltage, undervoltage, as well as over-current by using integrated electronic breakers (E-breake) and overvoltage protection (OVP).

Application Field

The LTC2877IMSE#PBF is particularly well-suited for a variety of industrial, medical and automotive applications such as power management, motor control, LED lighting, and data acquisition. It offers isolation of over 2,500V RMS and up to 240VCommon Mode Range (CMR). The device is rated to dissipate up to 1W in ground-referenced accessories, so it can be used in a wide range of applications, including high-isolation voltage, motors, and electronics.

Working Principle

The LTC2877IMSE#PBF is an isolated power and communications interface from Linear Technology. The device integrates signal and power isolation between its dedicated inputs and outputs and its internal logic/registers, supporting SPI and enhanced I2C/SMBus communication. The device also offers integrated protection from reverse-polarity, overvoltage, undervoltage and over-current protection by using integrated electronic breakers (E-Breakers) and overvoltage protection (OVP).

The device also integrated circuit (IC) protection from reverse voltage, overvoltage and undervoltage levels, including low drop-out (LDO) voltage regulator, on-chip diodes, and over voltage, under voltage and reverse polarity protection (Vrp-OVP) circuits. The device can automatically recognize the protocol used, allowing seamless switching between both Enhanced I2C/SMBus and SPI communication. It also provides logic level translation between 1.8V and 5.0V operational logic.

The LTC2877IMSE#PBF device is available in a variety of packages, including: SOIC, QFN and die form. The die form part may be mounted directly to the PCB to provide a low-profile package, while the other packages are removable and offer greater flexibility and more board space for system design.

Conclusion

The LTC2877IMSE#PBF transceiver is a highly integrated, isolated power and communication interface for robust and reliable communication in remote node applications. It offers wide common mode voltage swing range, integrated protection from reverse-polarity, overvoltage, undervoltage and over-current, as well as logic level translation between 1.8V and 5.0V operational logic. It is suitable for a variety of industrial, medical and automotive applications, such as power management, motor control, LED lighting and data acquisition. Its available in a variety of packages, including SOIC, QFN and die form.