描述 Description

The EMI2121 is an integrated common mode filter providing both ESD protection and EMI filtering for high speed serial digital interfaces such as USB2.0.The EMI2121 provides EMI filtering for one differential data line pair and ESD protection for one data pair plus a supply input such as USB2.0 Vbus or USB ID pin. It is supplied in a small RoHS compliant WDFN8 package.

特性 Features

? Highly Integrated Common Mode Filter (CMF) with ESD Protectionprovides protection and EMI Reduction for systems using high speedSerial Data Lines with cost and space savings over Discrete Solutions
? Integration of ESD and Filter function
? Large Differential Mode Bandwidth with Cutoff Frequency > 2 GHz
? Rejects cellular transmit frequencies
? High Common Mode Stop Band Attenuation: >25 dB at 700 MHz,>30 dB at 800 MHz Typical
? Rejects cellular transmit frequencies
? Provides ESD Protection to IEC61000-4-2 Level 4, 12 kV Contact Discharge
? High level ESD protection
? Low Channel Input Capacitance Provides Superior Impedance Matching
? Low capacitive loading

應(yīng)用 Application

? USB2.0 and other High Speed Differential Data Lines in Mobile Phones and Digital Still Cameras
? MIPI DPHY

簡(jiǎn)介

EMI2121屬于濾波器的共模扼流圈。由制造生產(chǎn)的EMI2121共模扼流圈共模扼流圈是一種電氣濾波器，能阻止兩條或更多條數(shù)據(jù)或電源線共有的高頻噪聲，但允許期望的直流或低頻信號(hào)通過。共模 (CM) 噪聲電流通常來自無用的無線電信號(hào)、非屏蔽電子設(shè)備、逆變器和電機(jī)等來源。如果不加以過濾，這種噪聲會(huì)在電子設(shè)備和電路中帶來干擾問題。