GaAs IC High Isolation Positive Control
SPDT Switch DC–2.5 GHz
AS148-24
Features
s
Positive Voltage Control
s
High Isolation (50 dB @ 0.9 GHz
and 1.9 GHz)
s
Low DC Power Consumption
s
Base Station Synthesizer Switch
0.050 (1.27 mm)
0.016 (0.40 mm)
0.158 (4.01 mm)
0.150 (3.81 mm)
PIN 1
INDICATOR
PIN 1
SOIC-14
PIN 14
0.050
(1.27 mm) BSC
0.244
(6.20 mm)
0.228
(5.80 mm)
0.020 (0.51 mm)
0.013 (0.33 mm)
0.049 (1.24 mm)
0.016 (0.41 mm)
Description
GaAs FET IC SPDT switch packaged in an SOIC-14
plastic package for low cost commercial applications. Ideal
building block for base station dual band applications
where synthesizer isolation is critical. Use in conjunction
with the AS123-12 SPST switch to meet GSM synthesizer
isolation requirement.
0.068
(1.73 mm) MAX.
0.016 MAX.
(0.41 mm)
x 45˚
CHAMFER
8˚ MAX.
0.344 (8.75 mm)
0.337 (8.55 mm)
0.010 (0.25 mm)
0.0098 (0.25 mm)
0.004 (0.10 mm)
0.0075 (0.19 mm)
0.158 (4.00 mm)
0.150 (3.80 mm)
Electrical Specifications at 25°C (0, +5 V)
Parameter
1
Insertion
Loss
3
Frequency
2
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–2.5 GHz
DC–2.0 GHz
DC–2.5 GHz
44
45
32
Min.
Typ.
0.6
0.8
1.2
50
50
42
1.3:1
1.5:1
1.5:1
1.8:1
Max.
0.9
1.1
1.4
Unit
dB
dB
dB
dB
dB
dB
Isolation
VSWR
4
Operating Characteristics at 25°C (0, +5 V)
Parameter
Switching Characteristics
5
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Two-tone Input Power +10 dBm
0.5–2.0 GHz
V
Low
= 0 to 0.2 V @ 20 µA Max.
V
High
= +5 V @ 200 µA Max. to +7 V @ 500 µA Max.
V
S
= V
High
± 0.2 V
Frequency
Min.
Typ.
60
100
50
+41
Max.
Unit
ns
ns
mV
dBm
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 ]
