CSPEMI200A
4 Channel Headset EMI Filter with ESD Protection
Features
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Four channels of EMI filtering
Pi-style EMI filters in a capacitor-resistor-capacitor
(C-R-C) network
Includes 1 channel of ESD-only protection
Greater than 30dB 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 bipolar signals—ideal for
audio applications
11-bump, 2.046mm X 1.436mm footprint
Chip Scale Package (CSP)
Chip Scale Package features extremely low
lead inductance for optimum filter and ESD
performance
Lead-free version available
Product Description
The CSPEMI200A is a quad low-pass filter array inte-
grating four pi-style filters (C-R-C) that reduce EMI/RFI
emissions while at the same time providing ESD pro-
tection. This device is custom-designed to interface
with the headset port on a cellular telephone, and con-
tains 3 different filter values. Each high quality filter
provides more than 20dB attenuation in the 800-2700
MHz range. These pi-style filters support bidirectional
filtering, controlling EMI both to and from the micro-
phone and speaker elements. They also support bipo-
lar signals, enabling audio signals to pass through
without distortion.
In addition, the CSPEMI200A provides a very high
level of protection for sensitive electronic components
that may be subject to electrostatic discharge (ESD).
The CSPEMI200A can safely dissipate 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 protection for contact
discharges to greater than
+
15kV.
The CSPEMI200A 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 CSPEMI200A is available in a
space-saving, low-profile Chip Scale Package with
optional lead-free finishing.
Applications
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EMI filtering and ESD protection for audio ports
Wireless Handsets
Handheld PCs / PDAs
MP3 Players
Digital Camcorders
Notebooks
Desktop PCs
Electrical Schematic
MIC_IN1
B1
100Ω
C1
MIC_OUT1
SPKR_IN1
C3
100pF
10Ω
A3
SPKR_OUT1
100pF
47pF
47pF
MIC_IN2
A2
68Ω
C2
MIC_OUT2
SPKR_IN2
C4
100pF
10Ω
A4
SPKR_OUT2
100pF
GND
GND
B3
B4
47pF
47pF
B2
ESD Channel
© 2005 California Micro Devices Corp. All rights reserved.
09/27/05
490 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.cmd.com
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CALMIRCO [ CALIFORNIA MICRO DEVICES CORP ]
