Specifications

Intel
®
810E2 Chipset Platform
R
Design Guide 111
Table 29. Additional DPLL LC Filter Component Example
Component Manufacturer Part No. Description
Capacitor KEMET T495D336MD16AS 33 µF ±20%, 16VDC,
ESR=0.225
Ω @ 100 kHz,
ESL=2.5 nH
Inductor muRATA LQG21NR10K10 100 nH ±10%, 250 mA,
Max dc resistance = 0.26
Ω,
size=0805,
magnetically shielded
As an example, is a Bode plot showing the frequency response using the capacitor and inductor values
shown in Table 30. The capacitor and inductor values were held constant while the resistance was swept
for four different combinations of resistance (the resistance of the discrete/trace resistor and the
resistance of the inductor), each resulting in a different series resistance. In addition, different values for
the resistance of the inductor were assumed based on its max and typical DC resistance. This is
summarized in Table 30. This yielded the four different frequency response curves shown in.
Figure 69. Frequency Response (see Table 30)
-40
0.100E-05
-30
-20
-10
0
Db
0.100E-3
0.01
1
100
MHz
Curve 0
Curve 1
Curve 3
Curve 2
Magnitude Response (VCCA)
filter2.vsd