Preliminary
PHEMT GaAs IC High Linearity Positive
Control SPDT Switch DC–2 GHz
AS185-92
Features
I
High Linearity (50 dBm IP3 @ 0.9 GHz)
@3V
I
Low Insertion Loss (0.35 dB @ 0.9 GHz)
I
+3 V Operation
I
Ultra Miniature SC-70 6 Lead Package
I
PHEMT Process
SC-70 6 Lead
0.079 (2.00 mm)
± 0.008 (0.20 mm)
0.0256 (0.65 mm)
BSC
0.049 (1.25 mm)
± 0.004 (0.10 mm)
0.087 (2.20 mm)
± 0.008 (0.20 mm)
PIN 1 INDICATOR
0.035 (0.90 mm)
± 0.004 (0.10 mm)
0.0055
(0.14 mm)
± 0.0015
(0.04 mm)
0.002 (0.005 mm)
± 0.002 (0.005 mm) 0.037 (0.95 mm)
± 0.006 (0.15 mm)
0.009 (0.23 mm)
REF
0.010 (0.25 mm)
± 0.006 (0.15 mm)
Description
The AS185-92 is a PHEMT GaAs FET IC high linearity
SPDT switch in a SC-70 6 lead 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
diversity switching over 2 W. The AS185-92 switch can be
used in many analog and digital wireless communication
systems including cellular, GSM and DECT applications.
0.008 (0.20 mm)
± 0.004 (0.10 mm)
Electrical Specifications at 25°C (0, +3 V)
Parameter
1
Insertion Loss
3
Frequency
2
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
25
20
14
Min.
Typ.
0.45
0.45
0.55
28
23
17
1.2:1
1.3:1
1.4:1
1.8:1
Max.
0.6
0.6
0.7
Unit
dB
dB
dB
dB
dB
dB
Isolation
VSWR
4
Operating Characteristics at 25°C (0, +3 V)
Parameter
Switching
Characteristics
5
Condition
Rise, Fall (10/90% or 90/10% RF)
On, Off (50% CTL to 90/10% RF)
Video Feedthru
0/+3 V
0/+5 V
For Two-tone Input Power +17 dBm
0/+3 V
0/+5 V
0.9 GHz
0.9 GHz
0.9 GHz
0.9 GHz
Frequency
Min.
Typ.
60
100
50
+34
+38
+50
+57
Max.
Unit
ns
ns
mV
dBm
dBm
dBm
dBm
Input Power for 1 dB Compression
Intermodulation Intercept Point (IP3)
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
4. Insertion loss state.
5. Video feedthru measured with 1 ns risetime pulse and 500 MHz bandwidth.
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.
Alpha Industries, Inc.
[781] 935-5150
•
Fax
[617] 824-4579
•
Email
sales@alphaind.com
•
www.alphaind.com
Specifications subject to change without notice. 11/99A
1
ALPHA [ ALPHA INDUSTRIES ]
