NJG1505R-C1 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJG1505R-C1

SPDT switch GaAs MMIC

Japan Radio Corporation  

NJG1505R

nRECOMMENDED PCB DESIGN

(TOP VIEW)

C1

C2

PCB SIZE=30.0x22.5mm

VCTL2

VCTL1

PCB: FR-4, t=0.5mm

STRIPLINE WIDTH=1mm

CAPACITORS: size 1005

Precautions

[1]

[2]

[3]

[4]

External capacitors should be connected to the input and output RF terminals (P1,

P2, PC) to block the DC current. The values of these capacitors depend on RF

frequency range. Please use a 0.01uF capacitor at 50 to 100MHz, a 0.1uF

capacitor at 100 to 500MHz, and a 56pF capacitor at 500MHz to 2GHz.

Decoupling capacitors should be connected to the control terminals (VCTR1, VCTR2)

as close as possible. The values of these capacitors should be selected to 0.01uF

at 50 to 100MHz, 0.1uF at 100 to 500MHz, and 10pF at 500MHz to 2GHz. Please

take care to select these values because the capacitors make switching time

long.

In order to keep good isolation characteristics, the ground terminals (3, 6, 7 pin)

should be connected to ground pattern with wider width as close as possible, and

through-hole in the ground plane should also be placed as close as possible.

The isolation of PC port to P1 port is greater than the isolation of PC port to P2

port. Please consider this information to create better isolation design.

-8-

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