CM1412屬于濾波器的EMI/RFI濾波器（LCRC網絡）。由安森美半導體公司制造生產的CM1412EMI/RFI 濾波器（LC，RC 網絡）該系列產品將幾種無源元器件集成到單個裝置中，可用于產生電流的頻率依賴性阻抗。盡管有其他類型，但大多數都是用于抑制不必要高頻信號傳輸的低通型，否則可能會導致干擾或意外操作。

Product Description

The CM1412 is a dual, low-pass filter array integrating two pi-style filters (C-R-C) that reduce EMI/RFI emissions while providing ESD protection. This part is custom-designed to interface with a microphone port on a cellular telephone or similar device. Each high quality filter provides more than 35dB attenuation in the 800 to 2700 MHz range. These pi-style filters support bidirectional filtering that control EMI both to and from a microphone element. They also support AC signals, enabling audio signals to pass through without distortion.

特性 Features

? Functionally and pin compatible with CMD’s CSPEMI202A

? OptiGuard? coated for improved reliability at assembly

? Two channels of EMI filtering

? Pi-style EMI filters in a capacitor-resistor capacitor (C-R-C) network

? Greater than 40dB attenuation at 1GHz

? +8kV ESD protection on each channel (IEC 61000-4-2 Level 4, contact discharge)

? +15kV ESD protection on each channel (HBM)

? Supports AC signals—ideal for audio applications

? Chip Scale Package features extremely low lead inductance for optimum filter and ESD performance

? 5-bump, 0.930mm X 1.410mm footprint Chip Scale Package (CSP)

? Lead-free RoHS compliant

Applications

? EMI filtering and ESD protection for headset microphone ports

? Wireless handsets

? Handheld PCs / PDAs

? MP3 players

? Digital camcorders

? Notebooks

? Desktop PCs