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Smallest EMI filters save board space for wireless handsets

Posted: 05 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:california micro devices? cmd? electromagnetic interference filter? emi filter? cm1440?

Touts higher filtering performanceCalifornia Micro Devices said its new 0.4mm pitch chip-scale package (CSP) Centurion EMI filters set a new price/performance standard for the industry. The new family of Application Specific Integrated Passive (ASIP) EMI filter arrays tout higher filtering performance and a reduced form factor along with ESD protection for wireless handsets.

With fast cutoff frequencies, steep roll-offs and deep attenuation, these new CM1440, CM1441 and CM1442 EMI filters can be used to filter and protect LCD display, camera module and dataport interfaces in mobile handset applications. They deliver the highest levels of EMI filter and ESD performance (up to 15kV contact discharge per IEC61000-4-2 Level 4 specification) in form factors that are more than 30 percent smaller than existing 0.5mm pitch CSP products, and up to 42 percent smaller when compared to existing TDFN solutions, said the company.

In addition, the new fine-pitch CSP ASIP devices are priced to offer significant savings when compared to 0.5mm CSP ASIP devices and equivalent solutions housed in TDFN packages. The company also noted that the new fine-pitch devices offer a combination of EMI filtering performance and ESD protection that cannot be met by discrete components, ceramic-based products or even similar ASIP architectures housed in TDFN packages.

Raising the bar in terms of form factor and performance, the new CM1440, CM1441 and CM1442 devices offer a high level of EMI filtering performance for various capacitance budgets and channel configurations in order to address a broad range of requirements and applications in the smallest form factor available on the market. These devices are based on a 2-pole C-R-C filter architecture.

Samples are available now with production volume scheduled for third quarter 2005. Pricing starts at 36 cents each in quantities of 1,000 for the six-channel version and 42 cents each in quantities of 1,000 for the eight-channel version. These devices are also available with the company's OptiGuard technology, and in RoHS-compliant, Pb-free CSPs.

- Gina Roos

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