全速/低速USB数字隔离器ADuM31601

该ADuM31601是USB端口隔离，结合了高速CMOS和单片空芯变压器技术，这种隔离组件，提供卓越的性能特点，并轻松地以更低和全速USB兼容外设集成。

许多微控制器实现的USB，使其呈现只有D +和D -线路的外部引脚。这是可取的，因为它在很多情况下最大限度地降低外部元件，简化了设计。USB线之间切换，必须积极推动Ð + / D -和允许外部电阻设置总线状态，ADuM3160在提供用于检测的输出缓冲器状态的数据流的方向和控制机制。数据方向是确定一个数据包由包的基础。

ADuM3160在与使用的内部逻辑结合的边缘检测基于iCoupler技术实现一个透明，易于配置，上游面向端口隔离。隔离上游街口提供了简单的诸多优势，电源管理。

在隔离了传播延迟可比一个标准的集线器和电缆。它工作的其中一项从3.0 V至5.5 V电源电压端，允许连接到VBUSx直接通过内部调节电压的信号水平。该ADuM3160提供孤立的上拉电阻器控制，使外设控制连接时序。设备消耗的电流足够低空闲挂起状态并不是必需的。

The ADuM31601 is a USB port isolator, based on Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technology, this isolation component provides outstanding performance characteristics and is easily integrated with low and full speed USB-compatible peripheral devices.

Many microcontrollers implement USB so that it presents only the D+ and D− lines to external pins. This is desirable in many cases because it minimizes external components and simplifies the design; however, this presents particular challenges when isolation is required. Because the USB lines must switch between actively driving D+/D− and allowing external resistors to set the state of the bus, the ADuM3160 provides mechanisms for detecting the direction of data flow and control over the state of the output buffers. Data direction is determined on a packet-by-packet basis.

The ADuM3160 uses the edge detection based iCoupler technology in conjunction with internal logic to implement a transparent, easily configured, upstream-facing port isolator. Isolating the upstream port provides several advantages in simplicity, power management, and robust operation.

The isolator has propagation delay comparable to that of a standard hub and cable. It operates with the supply voltage on either side ranging from 3.0 V to 5.5 V, allowing connection directly to VBUSx by internally regulating the voltage to the signaling level. The ADuM3160 provides isolated control of the pull-up resistor to allow the peripheral to control connection timing. The device draws low enough idle current that a suspend state is not required.