Filters Eliminate EMI In Data-Line Applications

Feb. 26, 2009

By providing both common- and differential-mode noise attenuation, the PDLF surface-mount electromagnetic-interference (EMI) filters promise to reduce noise by a factor of 32 from 15 to 300 MHz. They boast 300 V rms isolation. The filters come in four-, three-, and two-line as well as 500-mA versions. The four-line PDLF4000L, for example, delivers current to 1000 mA with at least 5 H inductance. The DC resistance (DCR) is as high as 250 mOhms. The high-current version, dubbed the PDLF4500L, has the same specifications except for current capability to 500 mA. The filters have ferrite cores with tin-silver-copper over tin over nickel over phosphor-bronze terminations. P&A: sampling now.

About the Author

Nancy Friedrich

RF Product Marketing Manager for Aerospace Defense, Keysight Technologies

Nancy Friedrich is RF Product Marketing Manager for Aerospace Defense at Keysight Technologies. Nancy Friedrich started a career in engineering media about two decades ago with a stint editing copy and writing news for Electronic Design. A few years later, she began writing full time as technology editor at Wireless Systems Design. In 2005, Nancy was named editor-in-chief of Microwaves & RF, a position she held (along with other positions as group content head) until 2018. Nancy then moved to a position at UBM, where she was editor-in-chief of Design News and content director for tradeshows including DesignCon, ESC, and the Smart Manufacturing shows.