ECLAMP2386K datasheet(5/8 Pages) SEMTECH

Part #	ECLAMP2386K

Description	ESD/EMI Protection for Color LCD Interfaces

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Manufacturer	SEMTECH [Semtech Corporation]

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PRELIMINARY

PROTECTION PRODUCTS

EClamp2386K

Applications Information

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.

Figure 3 - Recommended Layout Using Ground Vias

Figure 4 - Filter Characteristics Using Recommended

Layout with Internal Vias

1

2

3

4

START. 030 MHz

3

STOP

000.000000 MHz

CH1 S21

LOG

6 dB / REF 0 dB

1: -12.260 dB

112 MHz

2: -35.300 dB

800 MHz

3: -34.405 dB

1.8 GHz

4: -30.362 dB

2.7 GHz

0 dB

-6 dB

-12 dB

-18 dB

-24 dB

-30 dB

-36 dB

-42 dB

-48 dB

1

GHz

100

MHz

3

GHz

10

MHz

1

MHz

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