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Analog Devices / Maxim Integrated MAX14945 RS-485/RS-422 收发器

Maxim MAX14945 RS-485/RS-422 收发器可在器件的电缆侧（RS-485/RS-422 驱动器/接收器侧）和 UART 侧之间提供 2750VRMS (60s) 的电流隔离。 隔离通过中断接地环路来改善通信。 当端口之间的接地电位差异很大时，它还可以降低噪声。 信号通过集成的高压电容器穿过隔离栅。 该器件允许在任何速度时具有高达 500kbps 的稳健通信。 该器件包含一个半双工驱动/接收通道。 接收器为 1/8 单位负载，允许在公共总线上最多连接 256 个收发器。   集成的真正故障安全电路确保在输入短路或开路时接收器输出上保持逻辑高电平。 当电缆侧或 UART 侧电源低于功能级别时，欠压锁定会禁用驱动器。

The Analog Devices MAX14945 RS-485/RS-422 Transceiver is available in a wide-body 16-pin SO package and operates over the -40°C to +85°C temperature range. 

特性

  • Integrated Protection Ensures Robust Communication
    • ±30kV ESD (HBM) on Driver Outputs/Receiver Inputs
    • 2.75kVRMS Withstand-Isolation Voltage for 60s (VISO)
    • 630VPEAK Maximum Repetitive Peak-Isolation Voltage (VIORM)
    • 445VRMS Maximum Working-Isolation Voltage (VIOWM)
    • > 30 Years Lifetime at Rated Working Voltage
    • Withstands ±10kV Surge per IEC 61000-4-5
    • Thermal Shutdown
  • High-Performance Transceiver Enables Flexible Designs
    • Integrated LDO for Cable-Side Power
    • Compliant with RS-485 EIA/TIA-485 Standard
    • 500kbps Maximum Data Rate
    • Allows Up to 256 Devices on the Bus

应用

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

Functional Diagram

Analog Devices / Maxim Integrated MAX14945 RS-485/RS-422 收发器
发布日期: 2016-12-02 | 更新日期: 2023-04-21