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C2
C3
PC
V
CTR1
V
CTR2
P2P1
C1
C4 C5
1
NJG1507R
u
n
TEST CIRCUIT
n
RECOMMENDED PCB DESIGN
Precautions
[1]External capacitors should be connected to the input and output RF terminals (P1, P2,
PC) to block the DC current. The above example is a circuit at 1.9GHz. Please select the
capacitor value suitable for actual frequency from 10pF to 1000pF.
[2]Decoupling capacitors should be connected to the control terminals (V
CTR1
, V
CTR2
) as
close as possible. The values of these capacitors should be selected from 5pF to
100pF range. Please consider that these values are very effective to switching time
(Larger capacitor gives longer switching time).
[3]In order to keep good isolation characteristics, the ground terminals (3, 4, 6pin)
should be connected to the ground pattern with wider width as close as possible, and
through-hole in the ground plane should also be placed as close as possible.
PCB SIZE=19.5x14.0mm
PCB: FR-4, t=0.2mm
CAPACITOR: size 1005
STRIPLINE WIDTH=0.5mm
C1~C3: 56pF
C4, C5: 10pF
R1: 510KΩ
u: Please short between Pin4
and ground plane directly as
close as possible.
(TOP VIEW)
