NJG1508F
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SPDT SWITCH GaAs MMIC
nGENERAL DESCRIPTION nPACKAGE OUTLINE
NJG1508F is a GaAs SPDT switch MMIC which features
low loss, high isolation and low control current, and ideally
suitable the cellular phone handsets which needs to switch
during two frequency bands.
NJG1508F is operated in the wide frequency range from
50MHz to 3GHz at a low voltage from 2.5V with very small
MTP6 package.
nFEATURES
lSingle and low control voltage +2.5~+5.5V
lLow insertion loss 0.3dB typ. @f=1.0GHz, Pin=0dBm
lHigh isolation 27dB typ. @f=1.0GHz, Pin=0dBm
lTransmission power 19dBm max. @f=2.0GHz, VCTL=3.0V
lLow control current 1.0uA typ. @f=0.05~2.5GHz, Pin=10dBm
lPackage MTP6 (Mount Size: 2.8x2.9x1.2mm)
nPIN CONFIGURATION
n
TRUTH TABLE
VCTR1 HL L H
VCTR2 LHLH
P1-PC OFF ON Loss=15dB
P1 Return Loss=-3dB Loss=16dB
P1 Return Loss=-2dB
P2-PC ON OFF Loss=15dB
P2 Return Loss=-3dB Loss=16dB
P2 Return Loss=-2dB
NJG1508F
F Type
(Top View)
Orientation Mark
1
2
3 4
5
6Pin Connection
1.VCTR1
2.PC
3.VCTR2
4.P2
5.GND
6.P1
Note) The values of “Loss” and “Return Loss” are typical values.
“H”=VCTR (H), “L”=VCTR (L)
NJG1508F
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nABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER SYMBOL RATINGS UNITS
Input Power Pin 28 dBm
Control Voltage VCTR 6.0 V
Power Dissipation PD300 mW
Operating Temp. Topr -20~+85 °C
Storage Temp. Tstg -40~+150 °C
nELECTRICAL CHARACTERISTICS (VCTR (L)=0V, VCTR (H)=2.7V, ZS=ZO=50Ω, Ta=25°C)
PARAMETER SYMBOL RATINGS MIN TYP MAX UNITS
Control voltage (L) VCTR (L) f=0.05~2.5GHz, Pin=10dBm -0.2 0.0 0.2 V
Control voltage (H) VCTR (H) f=0.05~2.5GHz, Pin=10dBm 2.5 2.7 5.5 V
Control current ICTR f=0.05~2.5GHz, Pin=10dBm -1.0 2.0 uA
Insertion loss 1 Loss1 f=1.0GHz, Pin=0dBm -0.3 0.6 dB
Insertion loss 2 Loss2 f=2.0GHz, Pin=0dBm -0.5 0.85 dB
Isolation 1
(PC-P1, PC-P2, P1-P2) ISL1 f=1.0GHz, Pin=0dBm 23 27 -dB
Isolation 2
(PC-P1, PC-P2, P1-P2) ISL2 f=2.0GHz, Pin=0dBm 20 23 -dB
Pin at 1dB
compression point P-1dB f=2.0GHz 19 22 -dBm
VSWR (PC, P1, P2) VSWR f=0.05~2.5GHz, ON State -1.3 1.6
Switching time Tsw f=0.05~2.5GHz -15 -ns
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NJG1508F
nTYPICAL CHARACTERISTICS
NJG1508F
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nTYPICAL CHARACTERISTICS
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NJG1508F
nTYPICAL CHARACTERISTICS
NJG1508F
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nTYPICAL CHARACTERISTICS
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NJG1508F
nTYPICAL CHARACTERISTICS
MARKER f(MHz) Mag. Ang. (∠o)
1 50 0.912 -21.7
2 800 0.748 170.1
3 1500 0.728 101.3
4 2000 0.718 61.7
5 3000 0.671 -8.7
MARKER f(MHz) Mag. Ang. (∠o)
1 50 0.881 -19.2
2 800 0.713 172.3
3 1500 0.690 104.9
4 2000 0.681 66.1
5 3000 0.643 -3.2
NJG1508F
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n
TYPICAL CHARACTERISTICS
Scattering Parameters: S11 (OFF STATE)
(VCTR=0/2.7V, 50ΩSystem)
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NJG1508F
nAPPLICATION CIRCUIT 1: Single control signal operation by using C-MOS inverter.
[1]Please connect bypass capacitors to the supply terminals f the C-MOS inverter.
[2]In order to stabilize input impedance of inverter, please pull down using 510KΩ
resister from the input terminal of the C-MOS inverter to the ground plane.
nAPPLICATION CIRCUIT 2: Single control signal operation by using a transistor.
NJG1508F
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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: 510KΩ
nTEST CIRCUIT
nRECOMMENDED 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 900MHz.Please
select the capacitor value suitable for actual frequency from 10pF to 1000pF.
[2]Decoupling capacitors should be connected to the control terminals (VCTR1, VCTR2) 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 terminal (5pin) 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.
C4
C2
C3
C5
C1
P1
P2
PC
VCTR2 VCTR1
(TOP VIEW)
R1
3
VCTR2 (2.7V/0V)
Zo=50Ω
C2
C3
C4 VCTR1 (0V/2.7V)
NJG1508F
P2
P1
2
4
6
Zo=50ΩPC
Zo=50Ω
C1
5
1
R1
C5
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NJG1508F
nPACKAGE OUTLINE (MTP6)
Lead material : Copper
Lead surface finish : Solder plating
Molding material : Epoxy resin
UNIT : mm
Weight : 14mg
Cautions on using this product
This product contains Gallium-Arsenide (GaAs) which is a harmful material.
• Do NOT eat or put into mouth.
• Do NOT dispose in fire or break up this product.
• Do NOT chemically make gas or powder with this product.
• To waste this product, please obey the relating law of your country.
This product may be damaged with electric static discharge (ESD) or spike voltage. Please handle
with care to avoid these damages.
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative
usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
