ST EMIF06-AUD01F2滤波保护方案

ST公司的EMIF06-AUD01F2是用于音频接口的六线EMI滤波器和ESD保护器件,可以在各种系统中用来抑制EMI/RFI噪音.该滤波器所包括的ESD保护功能和IEC 61000-4-2 level 4兼容,达到15KV.可广泛应用在音频系统的ESD保护和EMI/RFI滤波,手机和通信系统以及无线模块.本文介绍了EMIF06-AUD01F2的主要特性和优势,方框图以及内部UPV建立电路图, 基本配置电路图, 立体声线输入电路图以及立体声麦克风输入电路图.

EMIF06-AUD01F2 6-line EMI filter and ESD protection for audio interface
The EMIF06-AUD01F2 is a highly integrated device designed to suppress EMI/RFI noise in all
systems subjected to electromagnetic interference. The flip chip packaging means the
package size is equal to the die size.

This filter includes ESD protection circuitry, which prevents damage to the application when it is subjected to ESD surges up to 15 kV.
主要特性:

■4-line EMI filter and ESD protection for internal and external (headset) microphone
■2-line EMI filter and ESD protection for headset speaker
优势:
■EMI (I/O) low-pass filter
■High efficiency EMI filter
■Very low PCB space consumption: 4.6 mm2
■Very thin package: 0.65 mm
■High efficiency in ESD suppression
■High reliability offered by monolithic integration
■High reduction of parasitic elements through integration and wafer level packaging
Complies with following standards
■IEC 61000-4-2 level 4 external pins
15 kV (air discharge)
8 kV (contact discharge)
IEC 61000-4-2 level 1 internal pins
2 kV (air discharge)
2 kV (contact discharge)

应用:
■ESD protection and EMI/RFI filtering for the audio bottom connector interface, where EMI filtering in ESD sensitive equipment is required:
■Mobile phones and communication systems
■Wireless modules



图1. EMIF06-AUD01F2 电路图



图2. EMIF06-AUD01F2内部UPV建立电路图
Application schematics



图3. EMIF06-AUD01F2 基本配置电路图



图4.采用EMIF06-AUD01F2 的立体声线输入电路图



图5. EMIF06-AUD01F2立体声麦克风/线路输入电路图



图6.外接平衡麦克风/立体声线路输入电路图