Press Release
California Micro Devices Introduces
New Generation Praetorian®
EMI Filter Architecture for Wireless Handsets
CM1460: Outstanding EMI Filter Performance
with Robust ESD Protection in Thin Package
MILPITAS, Calif., -- Feb. 28, 2006
-- California
Micro Devices (NASDAQ: CAMD) today introduced a new generation of its
proprietary Praetorian®
architecture and products as part of its ASIP™ (Application
Specific Integrated Passive™) EMI (electromagnetic interference)
filter portfolio. The Praetorian®
CM1460 EMI filter offers outstanding filter performance combined with
a high level of ESD (electrostatic discharge) protection in an industry
leading TDFN (Thin DFN) package. This high performance single chip solution
based on a 3 pole L-C architecture leverages CMD’s proprietary
Praetorian®
process technology that allows the integration of spiral inductors on
silicon.
The Praetorian®
CM1460 provides both superior EMI filtering and ESD protection for interfaces
connecting the host processor to the camera and display modules in wireless
handsets. In popular clamshell and slider phone configurations, such
interfaces are typically routed on a flexible printed circuit board,
highly vulnerable to EMI radiation and potential ESD strikes. In addition,
as data rates increase and signal integrity requirements become stricter,
the use of traditional EMI filters based on R-C (Resistor-Capacitor)
architectures results in significant signal degradation leading to potential
application issues such as visible data corruption on the display.
Key Features
Each channel of the CM1460 consists of a 3 pole L-C filter with a minimal
inductor value of 17nH and nominal capacitor values of 15pF. Its insertion
loss is much lower than R-C filters, typically less than 1dB. With a
typical corner frequency of 300MHz, rolloff of 20dB/octave and attenuation
greater than 30dB between 800MHz and 3GHz, the CM1460 offers industry
leading filter performance.
In addition, the CM1460 also features robust ESD protection up to ±15kV contact discharge per IEC61000-4-2 Level 4 specification and ±30 kV using the Human Body Model (HBM). In order to accommodate various interface configurations, the CM1460 is available in 4, 6 and 8 channel versions. The device is housed in an industry leading Thin DFN (TDFN) package featuring a typical height of 0.75mm and body sizes of 2.00mm x 2.00mm, 3.00mm x 1.35mm and 4.00mm x 1.60mm for the 4, 6 and 8 channel versions respectively.

Fig.1: CM1460
Attenuation Curve
Benefits
Using the Praetorian®
CM1460, wireless handset designers can benefit from the highest levels
of EMI filtering and ESD protection while still meeting host processor
requirements for input setup time as low as 2ns on the imager interface.
The CM1460 provides EMI filtering and ESD protection in a single chip
compared to ceramic filters that require the use of external discrete
ESD protection devices. The reduced part count optimizes the footprint
and lowers the overall bill of materials.
Pricing and Availability
The CM1460 is currently sampling, and pricing starts at $0.34, $0.43
and $0.52 in 1,000 units for the 4, 6 and 8 channel configurations respectively.
Production is scheduled for Q2 2006. The CM1460 is offered in a lead
free TDFN package.
About California Micro Devices Corporation
California Micro Devices Corporation is a leading supplier of application specific
analog semiconductor products for the mobile handset, personal computer and digital
consumer electronic markets. Key products include Application Specific Integrated
Passive™ (ASIP) devices and selected high value mixed
signal ICs. Detailed corporate and product information may be accessed at www.calmicro.com.
ASIP™, Application Specific
Integrated Passive™ and Praetorian®
are trademarks of California Micro Devices. All other trademarks are
property of their respective owners.
