Transceivers

October 1, 2012

Linear Technology Corporation (Milpitas, CA) has released automotive (H-grade) and high-reliability military (MP-grade) versions of the LTM2881 and LTM2882, isolated μModule® transceivers, which guard against large ground-to-ground differentials and common-mode transients in RS485 and RS232 networks. Using internal inductive signal isolation, the LTM2881 single RS485 and LTM2882 dual RS232 transceivers break ground loops by isolating the logic level interface and line transceiver.

A 1W DC/DC converter generates the power supplies for driving RS485 or RS232 levels, and provides an additional isolated 5V supply output for powering any supporting external components. With 2,500VRMS of galvanic isolation, onboard secondary power, and fully compliant transmitters and receivers, the LTM2881 and LTM2882 require no external components. The H- and MP-grade versions are guaranteed over operating ambient temperatures from -40°C to 105°C and -55°C to 105°C, respectively.

Two versions of the LTM2881 and LTM2882 support 3.3V and 5V input supply voltages. Both devices are offered in low profile 11.25 mm × 15 mm surface mount LGA (H-grade only) and BGA packages.

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