CM1418 Datasheet, PDF (1/10 Pages) California Micro Devices Corp – Praetorian™ L-C EMI Filter with ESD Protection for Headset Speaker Applications

Praetorian^TM L-C EMI Filter with ESD
Protection for Headset Speakers
CM1418
Features
• Two channels of EMI filtering
• ±30kV ESD protection
(IEC 61000-4-2, contact discharge)
• ±30kV ESD protection (HBM)
• OptiGuard™ Coating for improved reliability at
assembly
• Greater than 35dB of attenuation at 1GHz
• 6-bump, 1.720mm x 1.220mm footprint Chip Scale
Package (CSP)
• RoHS-compliant, lead-free finishing
Applications
• Headset Speaker port in mobile handsets
• I/O port protection for mobile handsets, notebook
computers, PDAs etc.
• EMI filtering for data ports in cell phones, PDAs or
notebook computers.
Product Description
The CM1418 is an L-C EMI filter array with ESD
protection that integrates two Pi-filters (C-L-C) for a
headset speaker. The CM1418 has component
values of 117pF/3.0nH/117pF. The parts include ESD
protection diodes on all input/output pins, and provide
a very high level of protection for sensitive electronic
components against possible electrostatic discharge
(ESD). The ESD diodes connected to the filter ports
safely dissipate ESD strikes of ±30kV, which is
beyond the maximum requirement of the IEC61000-
4-2 international standard. In accordance with MIL-
STD-883 (Method 3015) specification for Human
Body Model (HBM) ESD, the pins are protected for
contact discharges at greater than ±30kV.
This device is particularly well suited for portable
electronics (e.g. mobile handsets, PDAs, notebook
computers) because of its small package format and
easy-to-use pin assignments. In particular, the
CM1418 is ideal for EMI filtering and protecting
speaker output lines of the headset speaker from
ESD in mobile handsets. Most speakers have an
impedance of 8Ω. However, to maximize the power
output, the resistance of an EMI filter needs to be as
low as possible. The CM1418 addresses this by
using a C-L-C based EMI filter with an inductor
having less than 0.35Ω of resistance.
The CM1418 comes with OptiGuard™ coating
resulting in improved reliability at assembly. The
CM1418 is housed in a space saving, low profile Chip
Scale Package with RoHS-compliant, lead-free
finishing.
©2010 SCILLC. All rights reserved.
April 2010 Rev. 3
Publication Order Number:
CM1418/D