From: Ray Anderson ([email protected])
Date: Mon Nov 13 2000 - 10:20:23 PST
Looking up the Murata BLM11A601SPT part in a Murata catalog
you find the part is specified as such:
0.5 ohms DC resistance, 600 ohms impedance at 100 MHz
200 ma max DC current, temp range -55 to +125 C
Looking at the supplied impedance characteristic plot
it appears the it reaches a maximum impedance at
about ~120 MHz (around 700 ohms) and then drops off
to about 180 ohms at 1 GHz .
Whoever annotated your schematic as 600 MHz, 0.5 ohms
appears to have been in error.
-Ray
Sun Microsystems
> From: "Golian, Alexander" <[email protected]>
> To: "'[email protected]'" <[email protected]>
> Subject: [SI-LIST] : Question about ferrite beads
> Date: Mon, 13 Nov 2000 11:02:18 -0500
> MIME-Version: 1.0
>
> Greetings,
>
>
> On an evaluation board I am using, at the bottom of the page, it
calls for
> Ferrite Beads, 600MHz, 0.5ohms. The vendor chose a particular
inductor.
> The specs for this inductor, BLM11A601SPT, from Murata, does have a
DC
> resistance rating of 0.5 ohms, but it self resonates at ~150MHz.
What would
> the 600MHz mean, that the DC resistance is 0.5 at 600MHz?
>
>
>
> Alex
>
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