CM1412
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 35 d B 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.
In addition, the CM1412 provides a very high level of protection for sensitive electronic ponents that may be subjected to electrostatic discharge (ESD). The input pins safely dissipate ESD strikes of ±8 k V, the maximum requirement of the IEC 61000- 4- 2 international standard. Using the MIL- STD- 883 (Method 3015) specification for Human Body Model (HBM) ESD, the device provides protection for contact discharges to greater than ±15 k V.
The...
