GaAs IC High Isolation Positive
Control SPDT Switch DC鈥?.5 GHz
AS118-12
Features
s
Positive Control
s
High Isolation (45 dB @ 0.9 GHz)
s
Low Insertion Loss (0.5 dB @ 0.9 GHz)
PIN 1
INDICATOR
0.244 (6.20 mm)
0.228 (5.80 mm)
SOIC-8
PIN 8
0.050 (1.27 mm) BSC
Description
The AS118-12 is a reflective SPDT FET IC switch. The
switch requires external DC blocking capacitors, positive
supply and two positive controls. The device is mounted
in a plastic SOIC-8 package for surface mounting and is
ideal for use in high isolation switching applications, such
as base station synthesizer switching.
PIN 1
0.068
(1.73 mm) MAX.
0.020 (0.51 mm) MAX.
0.049
(1.24 mm)
0.016
(0.41 mm)
0.016 MAX.
(0.41 mm) x
45藲 CHAMFER
0.197 (5.00 mm)
0.189 (4.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
0.010 (0.25 mm)
0.007 (0.17 mm)
8藲
MAX.
Electrical Specifications at 25擄C (0, +5 V)
Parameter
1
Insertion Loss
3
Frequency
2
DC鈥?.5
DC鈥?.0
DC鈥?.0
DC鈥?.5
DC鈥?.5
DC鈥?.0
DC鈥?.0
DC鈥?.5
GHz
GHz
GHz
GHz
GHz
GHz
GHz
GHz
46
43
24
15
Min.
Typ.
0.55
0.6
0.7
0.9
50
46
27
18
1.2:1
1.4:1
1.6:1
1.4:1
1.7:1
2.1:1
Max.
0.65
0.7
0.8
1.1
Unit
dB
dB
dB
dB
dB
dB
dB
dB
Isolation
VSWR
4
DC鈥?.0 GHz
DC鈥?.0 GHz
DC鈥?.5 GHz
Operating Characteristics at 25擄C (0, +5 V)
Parameter
1
Switching Characteristics
5
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
0.9 GHz
For Two-tone Input Power +10 dBm
0.9 GHz
V
Low
= 0 to 0.2 V @ 20 碌A(chǔ) Max.
V
High
= +3 V @ 100 碌A(chǔ) Max. to +5 V @ 200 碌A(chǔ) Max.
V
S
= V
High
鹵 0.2 V
Frequency
Min.
Typ.
60
100
50
+26
+41
Max.
Unit
ns
ns
mV
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
Control Voltages
1. All measurements made in a 50
鈩?/div>
system, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/擄C.
4. Insertion loss state.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
Alpha Industries, Inc.
[781] 935-5150
鈥?/div>
Fax
[617] 824-4579
鈥?/div>
Email
sales@alphaind.com
鈥?/div>
www.alphaind.com
Specifications subject to change without notice. 3/99A
1
1
2
