Analog Devices / Maxim Integrated MAX14941/MAX14942 RS-485/PROFIBUS-DP 收发器
Maxim MAX14941/MAX14942 RS-485/PROFIBUS-DP 收发器可在器件的电缆侧(RS-485 驱动器/接收器侧)和 UART 侧之间提供 5000VRMS (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。 这些器件允许高达 20Mbps 的稳健通信。 一个集成的 LDO 提供了一种简单而且充分利用空间的架构,以便向 IC 的电缆侧提供电源。 每个器件均包含一个半双工驱动器/接收器通道。 接收器为 1/4 单位负载,允许在公共总线上最多连接 128 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 MAX14941 and MAX14942 RS-485/PROFIBUS-DP Transceivers are available in a wide-body 16-pin SOIC package and operate over the -40°C to +105°C temperature range.
特性
- Integrated Protections Ensures Robust Communication:
- ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
- 5kVRMS Withstand Isolation Voltage for 60s (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
- High-Performance Transceiver Enables Flexible Designs:
- Integrated LDO for Cable-Side Power
- Compliant with RS-485 EIA/TIa-485 Standard
- 20Mbps Maximum Data Rate
- Allows Up to 128 Devices on the Bus
应用
- HVAC
- Industrial Automation Equipment
- Power Meters
- Programmable Logic Controllers
Block Diagram
发布日期: 2016-12-02
| 更新日期: 2023-04-21
