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Analog Devices / Maxim Integrated MAX14857/MAX14859 RS-485/RS-422 Transceivers

Analog Devices MAX14857/MAX14859 RS-485/RS-422 Transceivers are isolated RS-485/RS-422 transceivers that provide 5000VRMS (60s) of galvanic isolation. This isolation is provided between the cable side (RS-485/RS-422 driver/receiver side) and the UART side of the device. The isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. These devices allow for robust communication up to 500kbps (MAX14857) or 25Mbps (MAX14859). The devices include an integrated 450kHz transformer driver for power transfer to the cable side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient architecture for powering the cable side of the IC.

Features

  • High Integration Simplifies Designs
    • Integrated LDO for Cable-Side Power
    • Integrated Transformer Driver for Power Transfer to Cable Side Has Up to 80% Efficiency at 150mA Load
  • High-Performance Transceiver Enables Flexible Designs
    • Compliant with RS-485 EIA/TIA-485 Standard
    • 500kbps (MAX14857) / 25Mbps (MAX14859) Maximum Data Rate
    • Up to 128 Devices on the Bus
  • Integrated Protection for Robust Communication
    • ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
    • 5kVRMS Withstand Isolation Voltage for 60 Seconds (VISO)
    • 1200VPEAK Maximum Repetitive Peak Isolation Voltage (VIORM)
    • 848VRMS Maximum Working Isolation Voltage (VIOWM)
    • >30 Years Lifetime at Rated Working Voltage
    • Withstands ±10kV Surge per IEC 61000-4-5
    • Thermal Shutdown

Applications

  • HVAC
  • Industrial Automation Equipment
  • Power Meters
  • Programmable Logic Controllers

Associated Eval Kit

Analog Devices / Maxim Integrated MAX149X2EVKIT Transceiver Evaluation Kit

Demonstration platform for the MAX14943, MAX14940, MAX14946, and MAX14949 transceivers.

Learn Moreacerca de Analog Devices / Maxim Integrated MAX149X2EVKIT Transceiver Evaluation Kit View Productsrelacionado con Analog Devices / Maxim Integrated MAX149X2EVKIT Transceiver Evaluation Kit
Publicado: 2016-03-24 | Actualizado: 2023-04-12