Milpitas, Calif. California Micro Devices has added the CM1418 and CM1419 devices to its Praetorian Application Specific Integrated Passive (ASIP) electromagnetic interference (EMI) inductor-based filter array family. The filter devices with electrostatic discharge (ESD) protection are aimed at audio applications in wireless handsets.
The CM1419 is an inductor-based EMI filter array with ESD protection which integrates two Pi filters (C-L-C). Component values are 117 pF/3.0 nH/117 pF for each channel. The ESD diodes connected to the filter ports are designed and characterized to dissipate ESD strikes of ±30 kV, which is beyond the maximum 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 ±30 kV.
In addition, the CM1419 is said to minimize insertion loss and features attenuation levels greater than -40 dB in the 800 MHz to 2.1 GHz frequency range. The device is housed in an ultra-compact 5-bump, 0.5-mm pitch chip-scale package (CSP) that measures 1.59 x 1.22 mm. Click here for the CM1419 datasheet.
CM1419 filter response curve
The CM1418 offers the same electrical characteristics in a larger 6-bump footprint that measures 1.72 x 1.22 mm. Click here for the CM1418 datasheet.
These EMI filter arrays are well suited for speaker applications in mobile handsets because it features an equivalent series resistance (ESR) of 0.28 ohms typical, which needs to be as low as possible in order to minimize insertion loss. It also contributes to better audio output as well as extended battery life, said the company.
These devices may also be used for I/O port protection for notebook computers and PDAs, and EMI filtering for data ports in cell phones, PDAs, and notebook computers.
Both the CM1419 and CM1418 are currently sampling, and pricing starts at $0.39 and $0.46 each in quantities of 1,000, respectively. Volume production is scheduled for first quarter 2006. Both products are offered in lead-free CSP packaging with CMD's optional OptiGuard.
California Micro Devices, 1-408-934-3108,www.calmicro.com
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