Press Release
California Micro Devices Introduces
Ultra Low Capacitance Praetorian®
EMI Filter for High Speed Data Lines
CM1470 Inductor Array: The EMI Filter
Solution for High Resolution Camera
Module Interfaces in Wireless Handsets
MILPITAS, Calif., -- Jan. 17, 2006
-- California
Micro Devices (NASDAQ: CAMD) today introduced a new member of its Praetorian®
ASIP™ (Application Specific Integrated Passive™)
EMI (electromagnetic interference) inductor-based filter arrays family,
offering outstanding filter performance combined with robust ESD (electrostatic
discharge) protection. The CM1470 targets high speed data lines for
high resolution imager interfaces in wireless handsets. In popular clamshell
and slider phone configurations, the interface signals are typically
routed on a flexible printed circuit board susceptible to EMI. Moreover,
as sensor resolution increases, these interfaces operate at higher data
rates, and maintaining signal integrity becomes a key requirement. Traditional
EMI filters based on R-C (Resistor-Capacitor) architectures result in
significant degradation of signal integrity, and cannot filter EMI effectively
while maintaining sharp edges of the signal. The ultra low capacitance
CM1470 single chip inductor array addresses both requirements by leveraging
its Praetorian®
process technology that allows the integration of spiral inductors with
high levels of ESD protection in an industry leading 0.4mm pitch Chip
Scale Package format.
Key Features
The CM1470 is a family of series inductor networks featuring ESD protection.
In order to accommodate various interface configurations, it is available
in 4, 6 and 8 channel versions. Each channel has an inductance of 18nH
and an ultra low input capacitance of 2pF. The series inductor architecture
results in minimum insertion loss, high cutoff frequency and therefore
an excellent level of signal integrity is preserved on the data lines
where the CM1470 is applied. The ESD diodes connected to the filter
ports are designed and characterized to safely dissipate ESD strikes
of ±2kV per Level 1 requirement of the IEC61000-4-2 international
standard. Using the MIL-STD-883 (Method 3015) specification for Human
Body Model (HBM) ESD, the pins are protected for contact discharges
at greater than ±4kV.
The CM1470 is housed in an industry leading ultra compact
and very cost effective 0.4mm pitch Chip Scale Package (CSP) of 2.07mm
x 0.876mm, 2.87mm x 0.876mm and 3.67mm x 0.876mm for the 4, 6 and 8
channel versions respectively.
Application
The CM1470 is tailored for high speed data lines for high resolution
imager interfaces in wireless handsets. Using the CM1470, mobile phone
or camera module designers can now provide a high level of EMI filtering
on their high speed interfaces without jeopardizing signal integrity.
It is common for high resolution sensors to output data rates at 80Mbps,
and host processor requirements in terms of input setup time can be
as low as 2ns. In order to meet these requirements, the capacitance
on the line must be minimized. As the CM1470 features minimum input
capacitance, designers now have the flexibility to adjust filter performance
and characteristics by tuning the capacitance on the flexible cable
on each channel.
Pricing and Availability
The CM1470 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 Q1 2006. The CM1470 is offered in a lead
free CSP package with CMD’s optional OptiGuard™
coating for increased robustness and durability.
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™ , OptiGuard™ and Praetorian®
are trademarks of California Micro Devices. All other trademarks are
property of their respective owners.
