ADUM4160

全速/低速USB数字隔离器 Full/Low Speed USB Digital Isolator

Product Details

The ADuM4160 is a USB port isolator, based on Analog Devices, Inc., _i_Coupler® technology. Combining high speed CMOS and monolithic air core transformer technology, these isolation components provide outstanding performance characteristics and are 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. 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 _i_Coupler technology in conjunction with internal logic to 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 supply voltage on either side ranging from 3.1 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; a suspend mode is not required.

**Applications**

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USB peripheral isolation

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Isolated USB hub

### Features and Benefits

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Fully USB 2.0 Compliant

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Low and full speed data rate: 1.5 Mbps and 12 Mbps

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Bidirectional communication

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Short-circuit protection for xD+ and xD− lines

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3.3 V and 5 V dual mode power configuration operation - Please see data sheet for further information.

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Class 3A contact ESD performance per ANSI/ESD STM5.1-2007

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High temperature operation: 105°C

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High common-mode transient immunity: >25 kV/μs

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Evaluation Board available

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Please see data sheet for additional features.