簡介:
ADuM4160是一款基于ADI公司iCoupler®技術(shù)的USB端口隔離器。它將高速CMOS工藝與單片空芯變壓器技術(shù)相結(jié)合,可提供優(yōu)異的工作性能,并且很容易與低速和全速USB兼容外設(shè)集成。
ADuM4160將基于邊沿檢測的 iCoupler 技術(shù)與內(nèi)部邏輯結(jié)合使用,可實現(xiàn)透明、易于配置、面對上游的端口隔離器。隔離上游端口具有電路簡單、電源管理和操作穩(wěn)健等多種優(yōu)勢。
這款隔離器的傳播延遲與標準集線器和電纜的傳播延遲相當。它可以采用任一側(cè)的3.1 V至5.5 V電源電壓供電,并能在內(nèi)部將該電壓調(diào)節(jié)至信號電平,從而與VBUS直接相連。ADuM4160對上拉電阻進行隔離控制,以便外設(shè)能控制連接時序。該器件的空閑電流較低;需要掛起模式。
特性:
完全兼容USB 2.0
低速和全速數(shù)據(jù)速率:1.5 Mbps和12 Mbps
雙向通信
xD+和xD−線路短路保護功能
3.3 V和5 V(雙模電源配置)-欲了解更多信息,請參考數(shù)據(jù)手冊。
3A類接觸式ESD性能,符合ANSI/ESD STM5.1-2007標準
工作溫度最高可達105℃
高共模瞬變抗擾度:>25 kV/μs
提供評估板
欲了解更多特性,請參考數(shù)據(jù)手冊。
功能圖:
方案特點:
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).
樣圖:
參考原理圖:
參考PCB圖:
詳情參見:http://www.analog.com/static/imported-files/user_guides/UG-043.pdf