CSPEMI202A
2 Channel Headset Microphone EMI Filter with ESD Protection
Features
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Two channels of EMI filtering
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
Greater than 40dB attenuation at 1GHz
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8kV ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
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15kV ESD protection on each channel (HBM)
Supports bipolar signals—ideal for
audio applications
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
5-bump, 0.950mm X 1.410mm footprint
Chip Scale Package (CSP)
Lead-free version available
Product Description
The CSPEMI202A is a dual low-pass filter array inte-
grating two pi-style filters (C-R-C) that reduce EMI/RFI
emissions while at the same time providing ESD pro-
tection. 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 800-2700 MHz range. These
pi-style filters support bidirectional filtering, controlling
EMI both to and from a microphone element. They also
support bipolar signals, enabling audio signals to pass
through without distortion.
In addition, the CSPEMI202A provides a very high
level of protection for sensitive electronic components
that may be subjected to electrostatic discharge (ESD).
The input pins are designed and characterized to
safely dissipate ESD strikes of 8kV, the maximum
requirement of the IEC 61000-4-2 international stan-
dard. Using the MIL-STD-883 (Method 3015) specifica-
tion for Human Body Model (HBM) ESD, the device
provides protection for contact discharges to greater
than 15kV.
The CSPEMI202A is particularly well suited for porta-
ble electronics (e.g., cellular telephones, PDAs, note-
book computers) because of its small package format
and low weight. The CSPEMI202A is available in a
space-saving, low-profile Chip Scale Package with
optional lead-free finishing.
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Applications
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EMI filtering and ESD protection for headset
microphone ports
Wireless Handsets
Handheld PCs / PDAs
MP3 Players
Digital Camcorders
Notebooks
Desktop PCs
Electrical Schematic
A1
47pF
68Ω
C1
47pF
MIC_IN1
MIC_OUT1
MIC_IN2
A3
47pF
68Ω
C3
47pF
MIC_OUT2
GND
B2
© 2003 California Micro Devices Corp. All rights reserved.
10/09/03
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
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Tel: 408.263.3214
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Fax: 408.263.7846
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www.calmicro.com
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
