芯片滤波磁珠选择推荐
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Ferrite Bead Recommendations 1Revision 101404
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ●
F ERRITE B EAD R ECOMMENDATIONS
Ferrite beads (or chips) are recommended for ICS products, for power supply filtering of the 3.3V or 5.0V supply. The three leading parameters to consider when selecting ferrite bead are DC resistance, AC impedance, and bias current rating. What is desired for good isolation is a low pass power filter. For that a bead with some DC resistance is best. How much resistance depends on how much voltage drop is allowed and therefore the maximum current of the device being powered.
For all power supply currents less than 200 mA, the Dale ILB-1206-300 is the recommended choice.
Manufacturer
Part Number
Bias Current (ma)
Pkg. Size
DC
Resistance
Impedance @ 100MHz
Murata BLM21A601R 50008050.30600Dale ILB-1206-30025012060.30300FairRite 2512066017X120012060.30600TDK
ACB2012M-150-T
300
0805
0.50
150