Small RF noise filter for audio lines in portable devices

Murata has released the NFZ03SG_SN series, an RF filter in 0201 size for audio lines in portable devices including tablets and smartphones. The series is claimed to be the smallest chip filter on the market offering high attenuation at communication frequencies while giving very low distortion to audio signals. Parts within the range can be chosen for typical attenuation impedances between 330Ohms and 1600Ohms at 900MHz and between 400Ohms and 1200Ohms at 1.7GHz. DC resistances range between 0.6Ohms and 1.7Ohms and rated current between 305mA and 180mA. At 0201 chip size, the filter is the smallest in the market matching the component density requirements of modern portable devices. This is accomplished by proprietary ferrite and manufacturing technology. The filter has an operating and storage temperature range of -55C to +125C.