AS148-24 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
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
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.
SOIC-14
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
0.068
(1.73 mm) MAX.
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)
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)
Insertion Loss³
Parameter¹
Isolation
VSWR⁴
Frequency²
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
Min.
44
45
32
Typ. Max. Unit
0.6
0.9
dB
0.8
1.1
dB
1.2
1.4
dB
50
dB
50
dB
42
dB
1.3:1
1.5:1
1.5:1
1.8:1
Operating Characteristics at 25°C (0, +5 V)
Parameter
Switching Characteristics⁵
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Frequency
Intermodulation Intercept Point (IP3)
Two-tone Input Power +10 dBm
0.5–2.0 GHz
Control Voltages
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
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
+41
Max.
Unit
ns
ns
mV
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