Myrtle Beach, S.C. AVX Corp. says its new multilayer chip EMI filter array, designed to reduce noise generated from signal lines in digital devices, features excellent attenuation characteristics at high frequencies.
The KNA21 EMI filter features a cut-off frequency of 400 MHz and an attenuation range of 800 MHz to 2.5 GHz ( 15dB attenuation) and 800 MHz to 1 GHz (20dB attenuation), which allows the device to manage noise attenuation over a broad spectrum in the high frequency range. The filters are rated at 25 Vdc and 50 mA.
Developed by AVX's Kyocera Developed Products Group (KDP), the KNA21 series consists of four high-performance EMI filter circuits in the industry's smallest size configuration of 2.0 x 1.25 x 0.85 mm. This device manages up to four lines in one component, which results in a reduction in component count, board space and assembly cost, said the company.
"With the continuing increase in processing speeds in digital technology, effective EMI filtering has become a critical factor in improving RF reception in mobile communication devices," said Tim Hollander, AVX / KDP marketing manager, in a statement. "By using our proprietary distributed constant circuit technology, AVX has integrated capacitors and inductors in a single element, thus making high performance ("steep and wide" attenuation at high frequencies) noise reduction possible in packages of this size."
The company said these circuits are particularly effective at improving RF reception in mobile phones by minimizing the noise emitted by high-speed digital signals generated by color LCDs and camera functions.
The KNA21 EMI filter is compatible with all major digital communication protocols including CDMA, GSM, PDC, PCS, UMTS and W-CDMA. Other AVX filters include the KNF21/32 series for signal lines, the KNA32 array series and the KNH21 series for power lines.
Typical pricing for the KNA21 EMI filter is less than $0.30 each in production quantities. Delivery is from stock to 12 weeks. Samples are available.
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