MEDIA RELEASE PR35804
California Micro Devices Introduces Low Capacitance Praetorian(R) III EMI Filters for
Wireless Handsets
MILPITAS, Calif., Aug. 24 /PRNewswire-AsiaNet/ --
CM1457 Establishes New Benchmark for EMI Filter Performance for
Advanced Multimedia and Smart Phones
California Micro Devices (Nasdaq: CAMD) today announced the CM1457 family
of inductor based electromagnetic interference (EMI) filters for mobile
handsets. With traditional filter architectures, there is a tradeoff between
low levels of capacitance -- which are necessary to achieve higher cutoff
frequencies -- and reduced levels of filter attenuation. The CM1457, based on
the advanced Praetorian III inductor based filter architecture, eliminates
this tradeoff by providing superior attenuation and industry leading low
capacitance. With a cutoff frequency of 400MHz and a steep rolloff, the
CM1457 is ideal for filtering signal lines for high resolution displays and
imagers in today's most advanced handsets, including those utilizing emerging
4G protocols such as LTE. The lower capacitance level of the CM1457 can also
contribute to reduced system power consumption. The combination of these
attributes makes the CM1457 an ideal solution for advanced multimedia and
smart phone designs.
"By balancing the stringent filter performance requirements of high
resolution displays and imagers with industry low levels of capacitance, the
CM1457 delivers best of breed performance," said Kyle Baker, vice president
of marketing for CMD. "And by utilizing the cost effective Praetorian III
technology and chip scale (CSP) packaging, the CM1457 can be offered at
prices comparable to current packaged RC EMI filters, thereby establishing a
new benchmark for performance and customer value."
Challenging System Design Requirements
Today's latest mobile handset designs include many high bandwidth data
interfaces to support popular consumer features such as high resolution LCDs
(liquid crystal displays) and camera imagers. Handset designers are
increasingly challenged to find EMI filter solutions that offer the high
cutoff frequencies required in these applications to ensure excellent signal
integrity and high levels of attenuation. Furthermore, to offset the
additional power consumed in support of these popular multimedia capabilities
and extend battery life, handset designers increasingly utilize advanced
baseband processors that operate at lower operating voltages and feature
lower output drive currents on display and imager interfaces. A lower
capacitance EMI filter, when paired with these advanced CPUs, can contribute
to reduced system power consumption.
The Praetorian III Advantage
The CM1457's Praetorian III EMI filter technology features a patent
pending architecture offering high cutoff frequencies, very steep roll off
and high levels of attenuation together with the world's lowest low total
capacitance in an L-C type filter. The CM1457 provides -30dB attenuation
starting at 700 MHz, and greater than -40dB attenuation from 800 MHz t0 3000
MHz. Typical cutoff frequency is 400MHz, allowing for excellent signal
integrity for clock frequencies as high as 125 MHz.
Main Features
Key performance attributes of the CM1457's scalable pi-filter topology
include:
- Cutoff frequency of 400 MHz typical
- Broad stop band from 700 MHz to 6 GHz
- High levels of attenuation and robust ESD protection up to
+/-15kV contact discharge, consistent with the IEC 61000-4-2 level 2
standard
- Superior signal integrity with rise and fall times as low as 2ns
- Minimal insertion loss (<1.5dB)
Maximum Layout and Placement Flexibility
The CM1457 family of solutions is available in packages providing 4, 6,
and 8 channels, allowing easy PCB layout and routing flexibility to wireless
handset designers. The table below shows the channel configuration options
with their respective dimensions. They are offered in space saving 0.4mm
pitch CSP packages.
CM1457 Product Family Summary
Product Number of Channels Package Dimensions and
Footprint
------- ------------------ ----------------------
CM1457-04CP 4 1.56 x 1.05 mm
----------- --- --------------
CM1457-06CP 6 2.36 x 1.05 mm
----------- --- --------------
CM1457-08CP 8 3.16 x 1.05 mm
----------- --- --------------
Pricing and Availability
The CM1457 series of products, all RoHS compliant, will sample in October
and be available in mass production in Q4 2009. Pricing ranges from $0.10 and
$0.20 each at 1,000 units depending on channel configuration.
About California Micro Devices Corporation
California Micro Devices Corporation is a leading supplier of protection
devices for the mobile handset, high brightness LED (HBLED), digital consumer
electronics and personal computer markets. Detailed corporate and product
SOURCE California Micro Devices Corporation
CONTACT: Kyle Baker, California Micro Devices Corporation,
+1-408-934-3117, kyleb@cmd.com
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