GaAs IC High Isolation Positive
Control SPDT Switch DC–2.5 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˚ 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˚
MAX.
Electrical Specifications at 25°C (0, +5 V)
Parameter
1
Insertion Loss
3
Frequency
2
DC–0.5
DC–1.0
DC–2.0
DC–2.5
DC–0.5
DC–1.0
DC–2.0
DC–2.5
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–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
Operating Characteristics at 25°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 µA Max.
V
High
= +3 V @ 100 µA Max. to +5 V @ 200 µA Max.
V
S
= V
High
± 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
Ω
system, unless otherwise specified.
2. DC = 300 kHz.
3. Insertion loss changes by 0.003 dB/°C.
4. Insertion loss state.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
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
1
ALPHA [ ALPHA INDUSTRIES ]
