全/低速5千伏USB数字隔离器adum4160数据表

　　TheADuM41601 is aUSBport isolator， based onAnalogDevices， Inc.，iCoupler®technology. Combining high speed CMOS and monolithicair core transformer technology， these isolation components provide outstanding performance characteristics and are easily integrated with low and full speed USB-compatible peripheral devices.

　　Many microcontrollersimplement USB so that it presents only the D+ and D− lines to externalpins. This is desirable in many cases because it minimizes external components andsimplifies the design; however， this presents particular challenges when isolation is required. USB lines must automatically switch between actively driving D+/D−， receiving data， and allowing external resistors to set the idle state of the bus. The ADuM4160 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 ADuM4160 uses the edge detection based iCoupler technology in conjunction with internallogicto implement a transparent， easily configured， upstream facing port isolator. Isolating an upstream facing 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 bus voltage on either side ranging from 4.5 V to 5.5 V， allowing connection directly to VBUS by internally regulating the voltage to the signaling level. The ADuM4160 provides isolated control of the pull-up resistor to allow the peripheral to control connection timing. The device has a low idle current; so a suspend mode is not required. A 2.5 kV version， the ADuM3160， is also available.