njg1508f New Japan Radio Co.,Ltd, njg1508f Datasheet - Page 10

• Manufacturer Part Number: njg1508f
• Description: Spdt Switch Gaas Mmic
• Manufacturer: New Japan Radio Co.,Ltd

NJG1508F
nTEST CIRCUIT
nRECOMMENDED PCB DESIGN
- 10 -
Precautions
[1]External capacitors should be connected to the input and output RF terminals (P1,
[2]Decoupling capacitors should be connected to the control terminals (V
[3]In order to keep good isolation characteristics, the ground terminal (5pin) should be
P2, PC) to block the DC current. The above example is a circuit at 900MHz.Please
select the capacitor value suitable for actual frequency from 10pF to 1000pF.
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).
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.
P2
P2
P1
C2
V
CTR2
C4
Z
Z
o
o
=50
=50
(TOP VIEW)
PC
C3
C2
C1
R1
4
5
6
C5
V
NJG1508F
CTR1
C1
P1
3
2
1
R1
C3
Z
C5
C4
o
PCB SIZE=19.4x14.0mm
PCB: FR-4, t=0.5mm
CAPACITOR: size 1005
STRIP LINE WIDTH=1mm
C1~C3: 56pF
C4, C5: 10pF
R1: 510k
=50
V
V
CTR1
CTR2
PC
(0V/2.7V)
(2.7V/0V)
CTR1
, V
CTR2
)