eclamp2384k Semtech Corporation, eclamp2384k Datasheet - Page 5

• Manufacturer Part Number: eclamp2384k
• Description: Esd/emi Protection For Color Lcd Interfaces
• Manufacturer: Semtech Corporation

Figure 3 shows the recommended device layout. The
ground pad vias have a diameter of 0.008 inches (0.20
mm) while the two external vias have a diameter of
0.010 inches (0.250mm). The internal vias are spaced
approximately evenly from the center of the pad. The
designer may choose to use more vias with a smaller
diameter (such as 0.005 inches or 0.125mm) since
changing the diameter of the via will result in little
change in inductance (i.e. the log function in Equation 2
in highly insensitive to parameter d) . Figure 4 shows a
typical insertion loss (S21) plot for the device using
Semtech’s filter evaluation board with 50 Ohm traces
and the recommended via configuration.
PROTECTION PRODUCTS
© 2007 Semtech Corp.
Applications Information
Figure 3 - Recommended Layout Using Ground Vias
5
Figure 4 - Filter Characteristics Using Recommended
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
-42 dB
-48 dB
-6 dB
0 dB
START . 030 MHz
CH1 S21
LOG
Layout with Internal Vias
MHz
1
6 dB / REF 0 dB
MHz
10
EClamp2384K
MHz
100
1
STOP 000 . 000 000 MHz
PRELIMINARY
GHz
3
2
1
www.semtech.com
3
GHz
4
3
1: -12.305 dB
2: -35.996 dB
3: -38.349 dB
4: -36.250 dB
106.6 MHz
800 MHz
1.8 GHz
2.7 GHz