AS178-73 Datasheet, PDF (1/2 Pages) Alpha Industries – PHEMT GaAs IC High Linearity Positive Control SPDT Switch DC-2 GHz

PHEMT GaAs IC High Linearity Positive
Control SPDT Switch DC–2 GHz
Preliminary
AS178-73
Features
I High Linearity (50 dBm IP3 @ 0.9 GHz)
@3V
I Low Insertion Loss (0.35 dB @ 0.9 GHz)
I Isolation (21 dB @ 0.9 GHz)
I +3 V Operation
I Ultra Miniature SOT-6 Package
I PHEMT Process
Description
The AS178-73 is a PHEMT GaAs FET IC high linearity
SPDT switch in a SOT-6 plastic package. This switch has
been designed for use where extremely high linearity, low
insertion loss and ultra miniature package size are
required. It can be controlled with positive, negative or a
combination of both voltages. Some standard
implementations include antenna changeover, T/R and
SOT-6
0.074
(1.90 mm REF.)
PIN 6
PIN 1
INDICATOR
PIN 1
0.126 (3.20 mm)
0.087 (2.20 mm)
0.071 (1.80 mm)
0.052 (1.30 mm)
0.020 (0.51 mm)
0.014 (0.350 mm)
0.006
(0.15 mm)
0.000
(0.00 mm)
0.057 (1.45 mm)
0.035 (0.90 mm)
0.037 (0.95 mm) REF.
5.0˚ ± 1˚
0.012
(0.30 mm)
TYP.
0.014
(0.26 mm)
0.004
(0.10 mm)
5.0˚ ± 1˚
0.122 (3.10 mm)
0.106 (2.70 mm)
0.022 (0.61 mm)
0.004 (0.10 mm)
diversity switching over 2 W. The AS178-73 switch can be
used in many analog and digital wireless communication
systems including cellular, GSM and DECT applications.
Electrical Specifications at 25°C (0, +3 V)
Insertion Loss³
Parameter¹
Isolation
VSWR⁴
Frequency²
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–0.5 GHz
DC–1.0 GHz
DC–2.0 GHz
DC–1.0 GHz
DC–2.0 GHz
Min.
25
20
14
Typ. Max. Unit
0.45
0.6
dB
0.45
0.6
dB
0.55
0.7
dB
28
dB
23
dB
17
dB
1.2:1
1.3:1
1.4:1
1.8:1
Operating Characteristics at 25°C (0, +3 V)
Parameter
Switching Characteristics⁵
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
Frequency
Min.
Typ. Max. Unit
60
ns
100
ns
50
mV
Input Power for 1 dB Compression
0/+3 V
0/+5 V
0.9 GHz
0.9 GHz
+34
dBm
+38
dBm
Intermodulation Intercept Point (IP3)
For Two-tone Input Power +17 dBm
0/+3 V
0/+5 V
0.9 GHz
0.9 GHz
+50
dBm
+57
dBm
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.
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email [e-mail] • www.alphaind.com
1
Specifications subject to change without notice. 11/99A