带有片上电视的RS485收发器设计，满足系统级ESD保护

Q4 Engineering

The Journal of Engineering Research Pub Date : 2021-09-22 DOI:10.36909/JER.9715

Zijie Zhou, Wenjie Zhang, Huihui Yuan, Qi Jiang, Yang Wang, Xiangliang Jin, Yan Peng, Jun Luo

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引用次数: 0

摘要

RS485接口广泛应用于工业控制和远程抄表领域，往往会受到严重的静电损坏。提出了一种无需额外工艺修改的片上电视(OCT)结构和一种用于RS485收发器集成电路的新型静电放电方法。它由一系列齐纳二极管组成，采用5V/18V/24V 0.5µm CDMOS技术制造。对提出的oct进行了100ns脉冲宽度的传输线脉冲(TLP)测试，驱动电路本身也可以作为ESD器件工作。OCT触发电压与RS485标准的信号电平兼容。人体模型(human-body-model, HBM) OCT器件防护等级高达16.34kV。与OCT集成的RS485收发器也经过了测试，以验证其可靠性。结果表明，该材料能够通过IEC61000-4-2接触±10kV应力和iec61000 -4- 4电气快速瞬变(EFT)±2.2kV，无硬损伤和闭锁问题。与OCT集成的RS485收发器允许无错误数据速率传输高达500 kbps。该芯片的硅面积为2.4×1.17mm2。

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A RS485 transceiver with on-chip TVS design to meet system level ESD protection

RS485 interface is widely used in the area of industrial control and remote meter reading, which are often subjected to serious electrostatic damage. A new On-Chip TVS (OCT) structure without extra process modification and a novel electrostatic discharge method for RS485 transceiver IC have been proposed. It is composed of a serie of Zener diodes and fabricated in 5V/18V/24V 0.5µm CDMOS technology. A 100ns pulse width of the Transmission Line Pulsing (TLP) test is performed for this proposed OCT. The driver circuit itself can work as an ESD device as well. The OCT trigger voltage is compatible with the signal level of RS485 standard. The OCT device protection level of human-body-model (HBM) is up to 16.34kV. RS485 transceiver integrated with OCT has also been tested in order to verify its reliability. The results indicate that it can pass the IEC61000-4-2 contact ±10kV stress and IEC 61000−4−4 Electrical Fast Transient (EFT) ±2.2kV without any hard damages and latch-up issues. The RS485 transceiver integrated with the OCT allows error-free data rate transfer up to 500 kbps. The chip occupies a silicon area of 2.4×1.17mm2.

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来源期刊

The Journal of Engineering Research Engineering-Engineering (all)

CiteScore

0.70

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： The Journal of Engineering Research (TJER) is envisaged as a refereed international publication of Sultan Qaboos University, Sultanate of Oman. The Journal is to provide a medium through which Engineering Researchers and Scholars from around the world would be able to publish their scholarly applied and/or fundamental research works.