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ADM2687EBRIZ


5kVrms 隔离式 RS-485/422 收发器,500kbps,isoPower 集成 DC-DC,+/-15kV ESD,SOIC-16,-40~85C

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制造商零件:

ADM2687EBRIZ

包装:

16 引脚宽体 SOIC_IC (RI-16-2)(10.3 x 7.5 毫米,>8 毫米爬电距离)

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Analog Devices 的 ADM2687EBRIZ 是一款完全集成的 5 kVrms 信号和电源隔离型 RS-485/RS-422 收发器,采用 16 引线宽体 SOIC 封装,爬电和间隙大于 8mm。它集成了 ADI iCoupler 技术,将一个 3 通道数字隔离器、一个三态差分线路驱动器、一个差分输入接收器和一个等功率隔离 DC-DC 转换器整合到一个封装中,只需一个 3.3V 或 5V 电源。主要规格:数据速率 500kbps,可配置半双工或全双工,一条总线上最多可连接 256 个节点,总线引脚具有正负 15kV ESD 保护,共模瞬态抗扰度大于 25kV/us,接收器输入具有开路和短路故障安全保护。等效电源转换器无需外部隔离直流-直流电源。电流限制和热关断功能可防止输出短路和总线争用。安全认证:UL 1577(5000Vrms 1 分钟)、IEC/CSA 62368-1、IEC/CSA 60601-1、IEC/CSA 61010-1。工作温度:-40C 至 85C。符合 RoHS 和 EAR99 标准。.

Analog Devices 的 ADM2687EBRIZ 是一款完全集成的 5 kVrms 信号和电源隔离型 RS-485/RS-422 收发器,是目前集成度最高的隔离型通信解决方案之一。该器件结合了 ADI 专有的 iCoupler 数字隔离技术和 isoPower 隔离 DC-DC 转换器技术,在单个 16 引线宽体 SOIC 封装中实现了完全的信号和电源隔离,无需任何外部隔离元件。.

ADM2687E 是 ADM268xE 系列中数据速率为 500kbps 的变体。ADM2682E 是 16Mbps 高速变体,功能相同,但数据速率更快。两者具有相同的封装、引脚布局和隔离规格,区别仅在于最大数据速率和相应的电源电流。.

该器件在一个封装中集成了五个关键功能模块:(1) 一个 3 通道 iCoupler 数字隔离器,为逻辑侧和总线侧之间的数据和控制信号(TxD、RxD、DE、RE)提供电隔离;(2) 一个三态差分 RS-485 线路驱动器,具有高电平有效使能(DE 引脚);(3) 一个差分输入 RS-485 接收器,具有低电平有效使能(RE 引脚)以及开路和短路条件下的故障安全偏置;(4) isoPower 隔离式 DC-DC 转换器,可从逻辑侧 VCC 产生隔离式总线侧电源,从而无需外部隔离式电源;(5) 电压调节和保护电路,包括电流限制和热关断。.

该器件的逻辑侧采用 3.3V 或 5V 单电源供电。内部等效电源转换器为总线侧收发器电路生成隔离的 3.3V 或 5V 电源(取决于 VCC)。VISOOUT 引脚必须与 VISOIN 引脚外部连接,以完成隔离电源环路。逻辑侧(VCC 引脚 2 上的 0.01uF 和 0.1uF,VCC 引脚 7 上的 0.1uF 和 10uF)和总线侧(VISOOUT 上的 0.1uF 和 10uF,VISOIN 上的 0.01uF 和 0.1uF)都需要旁路电容器,以实现适当的噪声抑制和电压调节。.

RS-485 收发器符合 ANSI/TIA/EIA-485-A-98 和 ISO 8482:1987(E) 标准。它在单条总线上支持多达 256 个节点。接收器输入具有故障安全偏置功能,可确保在输入开路或短路时输出逻辑高电平,防止在空闲总线上错误接收数据。驱动器输出在 A、B、Y 和 Z 总线引脚上提供正负 15kV ESD 保护(人体模型)。.

该器件的共模瞬态抗扰度超过 25 kV/us,因此在具有快速开关瞬态的嘈杂工业环境(电机驱动器、变频器、焊接设备)中具有很强的稳定性。5 kVrms 的隔离额定值为需要高压安全隔离的应用提供了更强的绝缘能力。.

宽体 SOIC 封装(10.3 x 7.5 毫米)在逻辑侧和总线侧之间提供大于 8 毫米的爬电和间隙,满足安全关键型应用中 5000Vrms 隔离的间距要求。该封装专为标准 1.27 毫米引脚间距的表面贴装而设计。后缀 BRI 表示宽体 SOIC 封装,后缀 Z 表示符合 RoHS 规范。.

ADM2687EBRIZ 是一款完全集成的隔离型 RS-485/RS-422 收发器,在单个封装中集成了信号隔离、电源隔离和总线收发器功能。.

信号隔离(iCoupler):iCoupler 数字隔离技术采用直接在半导体芯片上制造的芯片级微变压器,将数字信号耦合到隔离屏障上。输入数据信号(TxD、DE、RE)被编码成高频脉冲,驱动微变压器的初级绕组。次级绕组接收耦合脉冲,并将其解码为原始数字信号。三通道隔离器提供三个独立的隔离通道:一个用于发送数据(TxD 至 Y/Z),一个用于接收数据(A/B 至 RxD),一个用于控制信号(DE 和 RE)。隔离栅提供 5 kVrms 的电隔离,共模瞬态抗扰度超过 25 kV/us。.

电源隔离(isoPower):等效电源 DC-DC 转换器采用高频开关(约 180 MHz),通过芯片级变压器将电源从逻辑侧传输到总线侧。该转换器采用逻辑侧 VCC 电源(3.3V 或 5V),并为总线侧收发器电路生成具有相同额定电压的隔离电源 (VISOOUT)。VISOOUT 引脚必须与 VISOIN 引脚外部连接,以便为总线侧电路供电。这样就不需要外部隔离电源,大大简化了系统设计,减少了元件数量。由于开关频率高,因此可以在集成电路封装内使用非常小的变压器结构,但需要对 PCB 进行仔细布局,以控制辐射发射(请参阅 AN-0971)。.

RS-485 发射机:差分线路驱动器接收隔离的 TxD 信号,并在 DE 为高电平时驱动 Y(非反相)和 Z(反相)输出。当 DE 为低电平时,驱动器输出为高阻抗(三态)。驱动器提供电流限制输出,典型短路电流为 200mA。在全双工模式下,Y 和 Z 引脚用作专用驱动器输出。.

RS-485 接收器:当 RE 为低电平时,差分接收器监控 A(非反相)和 B(反相)输入引脚。当 (A-B) 大于 -30mV 时,接收器输出 (RxD) 为高电平;当 (A-B) 小于 -200mV 时,接收器输出 (RxD) 为低电平。在 -200mV 和 -30mV 之间,输出状态不确定。当 RE 为高电平时,接收器输出为三态。故障安全偏置确保接收器输出在输入开路(无连接)或短路时默认为高电平,从而防止在空闲总线上接收噪声。在全双工模式下,A 和 B 作为专用接收器输入。.

半双工与全双工:设备可通过外部引脚连接配置为任一模式。在全双工模式下,驱动器输出(Y、Z)和接收器输入(A、B)分别连接到总线电缆上的独立差分对(4 线制 + 接地)。在半双工模式下,Y 从外部连接到 A,Z 从外部连接到 B,共享一个差分对(2 线制 + 接地)。DE 和 RE 引脚控制着数据流的方向,当 DE=HIGH 时设备发送数据,当 RE=LOW 时设备接收数据。.

热保护和电流保护:该器件的驱动器输出端具有电流限制功能,当输出电流超过约 200mA 时(短路情况),电流限制功能将启动。当结温超过约 150 摄氏度时,热关断电路会禁用驱动器,从而保护器件在持续故障情况下免受损坏,例如多个驱动器同时工作的总线争用情况。.

针脚 名称 类型 侧面 说明
1 接地1 电源 逻辑 逻辑侧接地;连接至逻辑侧接地平面;使用加大焊盘和多个过孔进行散热
2 VCC 电源 逻辑 逻辑侧电源(3.0V 至 5.5V);在引脚 2 和引脚 1(GND1)之间安装 0.01uF 和 0.1uF 去耦电容器
3 RxD 输出 逻辑 接收器数据输出;当 A-B > -30mV 时为高电平;当 A-B < -200mV 时为低电平;当 RE 为高电平时为三态;驱动 CMOS/TTL 逻辑输入端
4 RE 输入 逻辑 接收器使能(低电平有效);低电平使能接收器并驱动 RxD;高电平三态 RxD;连接至 DE 补充,用于半双工方向控制
5 可选择丢弃 输入 逻辑 驱动器使能(高电平有效);高电平使能驱动器,驱动 Y 和 Z 输出;低电平三态驱动器输出;半双工时连接至 RE 补充器
6 TxD 输入 逻辑 发送器数据输入;当 DE 为高电平时,此处应用的数据显示在 Y(非反相)和 Z(反相)上;与 CMOS/TTL 兼容
7 VCC 电源 逻辑 逻辑侧电源(3.0V 至 5.5V);在引脚 7 和引脚 8(GND1)之间安装 0.1uF 和 10uF 去耦电容器
8 接地1 电源 逻辑 逻辑侧接地;连接至逻辑侧接地平面;使用加大焊盘和多个过孔进行散热
9 接地2 电源 巴士 总线侧接地;连接至总线侧接地平面;不得连接至 GND1;使用加大焊盘和多个过孔
10 VISOUT 电源 巴士 隔离电源输出;必须与 VISOIN(引脚 15)外部连接;在引脚 10 和引脚 9(GND2)之间安装 0.1uF 和 10uF 的储能电容器。
11 Y 输出 巴士 驱动器非反相输出;连接至 RS-485 总线 (+) 线;在半双工情况下,外部连接至 A(引脚 14)。
12 Z 输出 巴士 驱动器反相输出;连接至 RS-485 总线 (-) 线;半双工时,外部连接至 B(引脚 13)。
13 B 输入 巴士 接收器反相输入;连接至 RS-485 总线 (-) 线;半双工时,外部连接至 Z(引脚 12)。
14 A 输入 巴士 接收器非反相输入;连接至 RS-485 总线 (+) 线;在半双工情况下,外部连接至 Y(针脚 11)。
15 VISOIN 电源 巴士 隔离电源输入;必须与 VISOOUT(引脚 10)外部连接;在引脚 15 和引脚 16(GND2)之间安装 0.01uF 和 0.1uF 去耦电容器
16 接地2 电源 巴士 总线侧接地;连接至总线侧接地平面;不得连接至 GND1;使用加大焊盘和多个过孔
应用 说明
隔离 RS-485/RS-422 接口 嵌入式隔离 RS-485 解决方案只需一个电源和旁路电容器;无需外部光耦合器和隔离式 DC-DC 转换器;元件数量从 10 多个器件减少到一个 IC
工业现场网络 隔离的 Modbus RTU、Profibus 和其他工业协议接口;5kVrms 隔离可防止设备间发生接地回路;>25kV/us CMTI 可承受 VFD 和电机开关瞬态冲击
医疗设备隔离 经 IEC 60601-1 认证的隔离装置,适用于与患者连接的医疗设备;5000Vrms 隔离装置符合医疗设备安全要求;单包装解决方案简化了医疗设备认证程序
电能计量和智能电网 高压测量电路与低压处理单元之间的隔离通信;故障安全接收器可确保在噪声较大的电力线通信总线上可靠接收数据
楼宇自动化和暖通空调 楼宇控制器之间的隔离式 BACnet MS/TP 通信;支持 256 个节点,适用于大型楼宇网络;3.3V 和 5V 工作电压,兼容现代和传统控制器
模型 制造商 兼容性 主要区别
ADM2682EBRIZ ADI 同一家族,更高速度 16Mbps 数据传输速率(相对于 500kbps);相同的封装、引脚和隔离规格;全速时电源电流更大;需要更高的数据吞吐量时使用
ADM2587EBRIZ ADI 功能相似 隔离电压为 2.5kVrms(相对于 5kVrms);隔离额定值较低;数据传输速率同样为 500kbps;对于不需要 5kVrms 的应用,成本较低
ISO15 TI 功能相似 隔离型 RS-485 收发器;5kVrms 隔离;需要外部隔离电源;无集成 DC-DC;元件集成度较低;封装较小
MAX14853 马克西姆 功能相似 隔离式 RS-485,带集成变压器驱动器(需要外部变压器);500kbps;不同的电源隔离方法;元件数量较多,但 EMI 可能较低
SI8641BA 硅实验室 补充 仅数字隔离器(无收发器);可与非隔离型 RS-485 收发器配对,形成双芯片隔离解决方案;布局更灵活
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Tel / WhatsApp: +86 13760382860

服务与包装

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

Core Services

1. One-stop Sourcing & BOM Support

We specialize in a full range of passive and active electronic components, including SMD resistors, power resistors, connectors, aviation connectors, LED beads, flexible circuit boards, printed circuit boards, and integrated circuits. Our professional team provides BOM list consolidation, component matching, and alternative model recommendation services. We support sample orders, small-batch trial production, and mass production orders with flexible MOQs to meet diverse procurement needs.

2. Genuine Product Guarantee & Full-process Quality Inspection

All products are sourced from official authorized channels and are 100% original genuine parts. Every batch of goods undergoes strict full-process quality inspection before delivery, with complete batch records and traceability documents provided. Our products comply with AEC-Q standards for automotive electronics and high-reliability specifications for medical devices. We eliminate counterfeits, refurbished parts and defective products from the source to secure your project production.

3. Fast Quotation & Order Processing

Our customer service team responds promptly to inquiries and quotation requests. All in-stock orders will be processed within one working day. We provide stocking reservation services for long-term cooperative customers, effectively solving problems such as component shortages and unstable supply chains.

4. Professional Technical Support

Our senior engineer team provides free technical consultation, model selection guidance and original manufacturer datasheets. We assist customers in solving problems related to product R&D, circuit design and component application, providing reliable technical support for project progress.

5. Sourcing for Special Components

Relying on our global supply chain network, we professionally source scarce components, obsolete parts and customized special components to efficiently solve your procurement difficulties.

6. Global Logistics & Document Services

We cooperate with mainstream international logistics providers including DHL, FedEx, UPS and TNT to achieve fast global delivery. We can provide complete export documents such as customs declaration files, commercial invoices and packing lists to ensure smooth customs clearance for international shipments. Local pickup is also available for customers in Shenzhen, China.

Professional Packaging Standards

Electronic components are sensitive to static electricity, collision, moisture and dust. We adopt industry-standard anti-static packaging solutions to fully ensure the integrity of goods during transportation and storage.

1. General Packaging Specifications

  • All components are packed separately to avoid damage caused by friction and collision;
  • Shockproof buffer materials are added for fragile products to ensure transportation safety;
  • Each package is clearly marked with part number, quantity, batch number and specifications for easy inventory counting and management.

2. Classified Professional Packaging

  • Anti-static Packaging: Static-sensitive components such as chips, circuit boards and sensors are packaged with anti-static bags, shielding boxes and conductive foam in strict accordance with international anti-static standards to prevent static damage.
  • Vacuum Moisture-proof Packaging: Moisture-sensitive components are vacuum-sealed with desiccants to isolate humid air, suitable for ocean transportation and long-term storage.
  • Original Factory Packaging: Integrated circuits of brands such as NXP are delivered with original reels, trays or tubes by default, retaining complete original packaging and adapting to automated SMT production lines.
  • Discrete Device Packaging: Discrete devices such as SMD resistors, power resistors and LEDs are quantitatively and classifiedly packaged with accurate quantity and clear marking.
  • Connector / Aviation Connector Packaging: Hard outer packaging is adopted to prevent pin bending and structural deformation.

3. Custom Packaging Services

We provide value-added services including personalized packaging, custom labeling and re-reeling according to customer requirements, fully matching your production and warehouse management standards.

Contact Information

For service consultation or packaging customization, please feel free to contact us:
Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

Online Inquiry Form

Support Excel, PDF, CSV format files for full BOM list quotation

Submit your component procurement and custom packaging needs via the form below. We will provide a detailed quotation and professional solution within 1–8 working hours.