AS118-12 Datasheet, PDF (1/2 Pages) Alpha Industries – GaAs IC High Isolation Positive Control SPDT Switch DC-2.5 GHz

GaAs IC High Isolation Positive
Control SPDT Switch DC–2.5 GHz
Features
s Positive Control
s High Isolation (45 dB @ 0.9 GHz)
s Low Insertion Loss (0.5 dB @ 0.9 GHz)
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.
Electrical Specifications at 25°C (0, +5 V)
Insertion Loss³
Parameter¹
Isolation
VSWR⁴
SOIC-8
PIN 8
PIN 1
INDICATOR
PIN 1
0.068
(1.73 mm) MAX.
0.197 (5.00 mm)
0.189 (4.80 mm)
0.010 (0.25 mm)
0.004 (0.10 mm)
Frequency²
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
AS118-12
0.050 (1.27 mm) BSC
0.244 (6.20 mm)
0.228 (5.80 mm)
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
8˚
MAX.
0.158 (4.00 mm)
0.150 (3.80 mm)
0.010 (0.25 mm)
0.007 (0.17 mm)
Min.
46
43
24
15
Typ. Max. Unit
0.55 0.65
dB
0.6
0.7
dB
0.7
0.8
dB
0.9
1.1
dB
50
dB
46
dB
27
dB
18
dB
1.2:1
1.4:1
1.6:1
1.4:1
1.7:1
2.1:1
Operating Characteristics at 25°C (0, +5 V)
Parameter¹
Switching Characteristics⁵
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Frequency
Input Power for 1 dB Compression
0.9 GHz
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +10 dBm
0.9 GHz
Control Voltages
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
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.
Min.
Typ.
60
100
50
+26
+41
Max.
Unit
ns
ns
mV
dBm
dBm
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com
1
Specifications subject to change without notice. 3/99A