ایزولاتور ایزولاتور دیجیتال

Product Attributes

Introduction

The ADuM4160 is a USB port isolator, based on iCoupler 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 iCoupler 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 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.

Features

• USB 2.0 compatible
• Low and full speed data rate: 1.5 Mbps and 12 Mbps
• Bidirectional communication
• 4.5 V to 5.5 V VBUS operation
• 7 mA maximum upstream supply current @ 1.5 Mbps
• 8 mA maximum upstream supply current @ 12 Mbps
• 2.3 mA maximum upstream idle current
• Upstream short-circuit protection
• Class 3A contact ESD performance per ANSI/ESD STM5.1-2007
• High temperature operation: 105°C
• High common-mode transient immunity: >25 kV/μs
• 16-lead SOIC wide-body package version
• 16-lead SOIC wide body enhanced creepage version
• RoHS compliant
• Safety and regulatory approvals (RI-16 package)
  • UL recognition: 5000 V rms for 1 minute per UL 1577
  • CSA Component Acceptance Notice #5A
  • IEC 60601-1: 250 V rms (reinforced)
  • IEC 60950-1: 400 V rms (reinforced)
  • VDE Certificate of Conformity DIN V VDE V 0884-10 (VDE V 0884-10):2006-12 V10RM = 846 V peak

Applications

• USB peripheral isolation
• Isolated USB hub
• Medical applications