Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
1
Specifications subject to change without notice. 3/99A
GaAs IC SPST Switch
Reflective DC18 GHz
Features
s
Broadband DC18 GHz
s
Low Loss, High Isolation, Reflective, Short
s
100% On-Wafer RF and DC Testing
s
100% Visual Inspection to MIL-STD-883
MT 2010
AS018R1-00
Description
The AS018R1-00 GaAs SPST MMIC FET switch chip is
ideal for applications requiring low loss, high isolation
and/or broadband operation. The GaAs MMIC employs
one series and three shunt FETs for low loss, high
isolation switching. Each chip is measured on a 100%
basis at 2, 10 and 18 GHz for insertion loss, isolation, input
and output return losses and gate leakage. Power
consumption is very low, typically 75
A at -5 V. While
recommended for operation up to 18 GHz, the switch
performs well through 26 GHz.
2 GHz
10 GHz
18 GHz
2, 10 and 18 GHz
Parameter
1
Typ.
Typ.
Typ.
Min.
Max.
Unit
Insertion Loss
2
0.6 1.7
1.5
2.0
dB
Isolation 59
57
47
40
dB
Input Return Loss
17
7
9.5
6
dB
Output Return Loss
18
9
13
6
dB
Electrical Specifications at 25C
0.000
0.000
0.727
1.074
2.030
0.125
1.145
1.388
1.270
Chip Outline
Dimensions indicated in mm.
All DC (V) pads are 0.1 x 0.1 mm and RF In, Out pads are 0.07 mm wide.
Chip thickness = 0.1 mm.
1. All measurements made in a 50
system, unless otherwise specified.
2. Insertion loss changes by 0.003 dB/C.
3. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Parameter
Condition
Frequency
Min.
Typ.
Max.
Unit
Switching Characteristics
Rise, Fall (10/90% or 90/10% RF)
3
ns
On, Off (50% CTL to 90/10% RF)
6
ns
Video Feedthru
3
20
mV
Input Power for 1 dB Compression
0/-5 V
0.518 GHz
24
dBm
0.001 GHz
16
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power 13 dBm
0.518 GHz
46
dBm
0.001 GHz
35
dBm
Control Voltages
V
Low
= 0 to -0.2 V @ 20 A Max.
V
High
= -3 V to -6 V @ 250 A Max.
Operating Characteristics at 25C
GaAs IC SPST Switch Reflective DC18 GHz
AS018R1-00
2
Alpha Industries, Inc. [781] 935-5150
Fax [617] 824-4579
Email sales@alphaind.com
www.alphaind.com
Specifications subject to change without notice. 3/99A
Insertion Loss and Isolation vs. Frequency
Frequency (GHz)
-3.0
-3.5
2
4
6
8
10 12 14 16 18 20 22 24 26
-2.5
-2.0
-1.5
-1.0
-0.5
I
n
s
e
r
t
i
o
n
L
o
s
s
(
d
B
)
0.0
-60
-70
-50
-40
-30
-20
-10
0
I
s
o
l
a
t
i
o
n
(
d
B
)
Return Loss vs. Frequency
Frequency (GHz)
-30
2
4
6
8
10 12 14 16 18 20 22 24 26
-25
-20
-15
-10
-5
I
n
p
u
t
R
e
t
u
r
n
L
o
s
s
(
d
B
)
0
-30
-25
-20
-15
-10
-5
0
O
u
t
p
u
t
R
e
t
u
r
n
L
o
s
s
(
d
B
)
Typical Performance Data
J
1
J
2
V
1
V
2
Switch Schematic
J
1
J
2
V
1
V
2
Chip Layout
V
1
V
2
J
1
J
2
0
-5
Isolation
-5
0
Low Loss
Truth Table
Characteristic
Value
RF Input Power (RF In)
1 W
Control Voltage (V
C
)
+0.2 V, -7 V
Operating Temperature (T
OP
)
-55C to +125C
Storage Temperature (T
ST
)
-65C to +150C
Thermal Resistance (
JC
)
83C/W
Absolute Maximum Ratings
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