Isolated RS-485 Transceivers include Transformer Driver and LDO

Designers can achieve ease of design, high efficiency, and robust communication for industrial automation applications with the MAX14853/MAX14855 and MAX14943/MAX14949 family of highly integrated RS-485 transceivers from Maxim Integrated Products, Inc. Designers of industrial automation equipment require solutions that provide flexibility and high efficiency. The high integration of the RS-485 family of transceivers with integrated transformer drivers and low drop out (LDO) regulator simplifies power and data isolated designs.

The MAX14943 isolated RS-485/PROFIBUS DP transceiver, as well as the MAX14949 transceiver, each provide up to 80% efficiency at 150mA load. Available in full or half duplex isolated RS-485 transceivers, the family supports up to 5kVrms and allows for robust communication up to 25Mbps. The transceivers are ideal for industrial automation, programmable logic controllers (PLC), HVAC, and power meter applications.

Key advantages of these transceivers include: Ease of design: Simplifies design and provides flexibility through integration; transceivers include a transformer driver and an LDO; Robust communication: 2.75kVrms and 5kVrms isolation options protect against large differences in ground potential between ports; Robust +35kV (HBM ESD) on driver outputs/receiver inputs; and High efficiency: Integrated transformer driver provides up to 80% efficiency at 150mA load.

"Our high ESD transceivers, coupled with Maxim's robust digital isolation technology, provide the industry's most robust isolated RS-485 solution on the market," said Timothy Leung, Senior Business Manager at Maxim Integrated. "We integrated an LDO to regulate the isolated power and provide designers with a smaller solution and lower system cost."

These transceivers are available in a 16-pin W-SOIC package (11mm x 11mm). Operation is specified over the temperature range of -40 to +105 degrees C. The MAX148X2 evaluation kit (MAX14853 and MAX14855) and the MAX149X2 evaluation kit (MAX14943 and MAX14949) are also available.