CSPEMI205 Datasheet, PDF (1/7 Pages) California Micro Devices Corp – 3 Channel Headset EMI Filter with ESD Protection

CSPEMI205
3 Channel Headset EMI Filter with ESD Protection
Features
• Three channels of EMI filtering, two for earpiece
speakers and one for a microphone
• Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
• Chip Scale Package features extremely low para-
sitic inductance for optimum filter performance
• Greater than 30dB relative attenuation in the 800-
2700MHz range
• +8kV ESD protection on each channel
(IEC 61000-4-2 Level 4, contact discharge)
• +15kV ESD protection on each channel (HBM)
• 8-bump, 1.41mm X 1.45mm footprint
Chip Scale Package (CSP)
• Lead-free version available
Applications
• EMI filtering and ESD protection for headset micro-
phone and speaker
• Cellular / Mobile Phones
• Notebooks and Personal Computers
• Handheld PCs / PDAs / Tablets
• Wireless Handsets
• Digital Camcorders
Product Description
The CSPEMI205 is a low-pass filter array integrating
three pi-style filters (C-R-C) that reduce EMI/RFI emis-
sions while at the same time providing ESD protection.
This device is custom-designed to interface with the
headset port on a cellular telephone, and contains two
different filter values. Each high quality filter provides
more than 30dB attenuation in the 800-2700 MHz
range. These pi-style filters support bidirectional filter-
ing, controlling EMI both to and from the microphone
and speaker elements. They also support bipolar sig-
nals, enabling audio signals to pass through without
distortion.
In addition, the CSPEMI205 provides a very high level
of protection for sensitive electronic components that
may be subject to electrostatic discharge (ESD). The
input pins are designed and characterized to safely dis-
sipate ESD strikes of +8kV, 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 protec-
tion for contact discharges to greater than +15kV.
The CSPEMI205 is particularly well suited for portable
electronics (e.g., cellular telephones, PDAs, notebook
computers) because of its small package format and
low weight. The CSPEMI205 is available in a space-
saving, low-profile Chip Scale Package with optional
lead-free finishing.
Electrical Schematic
Earpiece 1 ^A1
Input
10 Ω
C1 _{Earpiece 1}
Output
Microphone ^A5
Input
68 Ω
C5 _Microphone
Output
Earpiece 2 ^A3
Input
10 Ω
C3 _{Earpiece 2}
Output
GND ^B2
GND ^B4
© 2003 California Micro Devices Corp. All rights reserved.
10/09/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: [phone] L Fax: [phone] L www.calmicro.com
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