ADI 公司的USB端口隔离方案
发布时间:2012-11-20 12:02
发布者:1770309616
简介: ADuM4160是一款基于ADI公司iCoupler®技术的USB端口隔离器。它将高速CMOS工艺与单片空芯变压器技术相结合,可提供优异的工作性能,并且很容易与低速和全速USB兼容外设集成。 ADuM4160将基于边沿检测的 iCoupler 技术与内部逻辑结合使用,可实现透明、易于配置、面对上游的端口隔离器。隔离上游端口具有电路简单、电源管理和操作稳健等多种优势。 这款隔离器的传播延迟与标准集线器和电缆的传播延迟相当。它可以采用任一侧的3.1 V至5.5 V电源电压供电,并能在内部将该电压调节至信号电平,从而与VBUS直接相连。ADuM4160对上拉电阻进行隔离控制,以便外设能控制连接时序。该器件的空闲电流较低;需要挂起模式。 特性: 完全兼容USB 2.0 低速和全速数据速率:1.5 Mbps和12 Mbps 双向通信 xD+和xD−线路短路保护功能 3.3 V和5 V(双模电源配置)-欲了解更多信息,请参考数据手册。 3A类接触式ESD性能,符合ANSI/ESD STM5.1-2007标准 工作温度最高可达105℃ 高共模瞬变抗扰度:>25 kV/μs 提供评估板 欲了解更多特性,请参考数据手册。 功能图: ![]() 方案特点: The design goals of this evaluation platform are to • Connect to systems through standard USB Type A and Type B connectors. • Draw power from the USB host or from an external 5.0 V or 3.3 V power supply. • Support isolated power for the downstream interface through an ADuM5000 isoPower® dc-to-dc converter. • Support external downstream power from a 5 V or 3.3 V power supply. • Provide test points for all power and signal paths. • Support low and full speed communications. • Support enumeration control. • Support external ESD protection. • Support common-mode chokes in the xD+/xD− lines. • Support ferrite inductors in the VBUSx and GNDx lines. Features of the isolator include the following: • Built-in voltage regulators allow the ADuM4160 and ADuM3160 to draw power from either 5 V or 3.3 V sources. • Application of the upstream pull-up resistor is under the control of a downstream pin, PIN (Pin 12). • The operating speed of the isolator is set by pins on the upstream and downstream sides of the part, SPU and SPD (Pin 5 and Pin 13, respectively). 样图: ![]() 参考原理图: ![]() ![]() 参考PCB图: ![]() 详情参见: ![]() (网络) |
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