SW
-
485
Functional Schematic
Features
Low Insertion Loss 0.3 dB Typ. @ 2.4 GHz
Moderate Isolation 21 dB @ 2.4 GHz
Low Power Consumption <5 A @ +2.3V
Low Cost Plastic SOT-363 Package
Description
M/A-COM's SW -485 is a GaAs PHEMT MMIC SPDT
switch in a low cost SC-70 (SOT-363) surface mount plas-
tic package. The SW-485 is ideally suited for applications
where very small size and low cost are required. Typical
applications are dual band systems where switching b e-
tween small signal components is required such as filter
banks, single-band LNAs, converters, etc. This part can be
used for low power, low loss requirements in the all sys-
tems operating up to 3 GHz, including PCS, GSM, DCS,
Blue Tooth, and other Rx chain applications.
The SW -485 is fabricated using a 0.5 micron gate length
GaAs PHEMT process. The process features full passiv a-
tion for performance and reliability.
Handling Procedures
The following precautions should be observed to avoid
damage:
Static Sensitivity
Gallium Arsenide Integrated Circuits are ESD sensitive and
can be damaged by static electricity. Proper ESD tech-
niques should be used when handling these devices.
GaAs SPDT Switch
0.05 - 3.0 GHz
RF1 GND RF2
V1
RFC
V2
PIN 1
C=39pF
C=39pF
C=39pF
Pin No.
Function
Description
1
RF1
RF Port 1
2
GND
Ground
3
RF2
RF Port 2
4
V2
Control 2
5
RFC
RF Input
6
V1
Control 1
Pin Configuration
Truth Table
2
Mode
(Control)
Control
V1
Control
V2
RFC- RF1 RFC-RF2
Positive
1
0 0.2V
+2.3 to +5V
+2.3 to +5V
0 0.2V
On
Off
Off
On
2. External DC blocking capacitors are required on all RF
ports.
Parameter
Absolute
Maximum
Max Input Power (0.5 - 3.0 GHz)
3 V Control
+32 dBm
5 V Control
+34 dBm
Operating Voltage
+8.5 volts
Operating Temperature
-40 C to +85 C
Storage Temperature
-65 C to +150 C
1. Exceeding any one or combination of these limits may
cause permanent damage.
Absolute Maximum Ratings
1
GaAs SPDT Switch 0.05--3.0 GHz
SW-485
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
Parameter
Test Conditions
Units
Min
Typ
Max
Insertion Loss
0.05-1.0 GHz
0.05-3.0 GHz
dB
dB
0.25
0.35
0.4
0.55
Isolation
0.05-1.0 GHz
0.05-3.0 GHz
dB
dB
20
20
23
21
VSWR
0.05-3.0 GHz
dB
1.1:1
1.2:1
IP2
Two Tone +5 dBm, 5 MHz Spacing, >50 MHz
dBm
90
IP3
Two Tone +5 dBm, 5 MHz Spacing, >50 MHz
dBm
46
P1dB
Vc = 0.2V/2.5V
Vc = 0.2V/3.0V
dBm
dBm
21
25
Trise, Tfall
10% to 90% RF and 90% to 10% RF
nS
35
Ton, Toff
nS
40
Transients
mV
10
Electrical Specifications: T
A
= 25C, Z
0
= 50
3
3. Insertion Loss can be optimized by varying the DC Blocking Capacitor value, i.e. 1000 pF for 100 MHz--1GHz, 39 pF for
0.5 GHz--3 GHz.
SC-70 (SOT-363) Plastic Package
4
4. All dimensions are JEDEC MO-203-AB Issue A and are
shown as in/mm.
Dim
Measurement (mm)
Min.
Nom.
Max.
A
-
-
1.10
A1
0
-
0.10
A2
0.70
0.90
1.00
b
0.15
-
0.30
c
0.08
-
0.25
D
-
2.00 basic
-
e
-
0.65 basic
-
E
-
2.10 basic
-
E1
-
1.25 basic
-
L
-
0.42 ref.
-
PIN
1
PIN
6
D
e e
E
A
A1
b
c
L
A
E1
A2
Ordering Information
Part Number
Package
SW-485
SC-70 (SOT-363) Plastic Package
SW-485TR-3000
Forward Tape and Reel,
3000 pcs
SW-485SMB
Sample Board
2
GaAs SPDT Switch 0.05--3.0 GHz
SW-485
Specifications subject to change without notice.
n
North America: Tel. (800) 366-2266
n
Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n
Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
Typical Performance Curves
3
VSWR vs. Frequency, Over
Temperature, 39 pF
Isolation vs. Frequency, Over
Temperature, 39 pF
15
17
19
21
23
25
27
29
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Isolation (dB)
+85C
+25C
-40C
Insertion Loss vs. Frequency,
Over Temperature, 39 pF
Insertion Loss vs. Frequency,
Over Temperature, 1000 pF
Isolation vs. Frequency,
Over Temperature, 1000 pF
VSWR vs. Frequency, Over
Temperature, 1000 pF
1
1.05
1.1
1.15
1.2
1.25
1.3
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Frequency (GHz)
VSWR
-
40C
+25C
+85C
1
1.1
1.2
1.3
1.4
1.5
0.5
1
1.5
2
2.5
3
Frequency (GHz)
VSWR
+85C
+25C
-40C
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.5
1
1.5
2
2.5
3
Frequency (GHz)
Insertion Loss (dB)
+85C
+25C
-
40C
20
25
30
35
40
45
50
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Frequency (GHz)
Isolation (dB)
+85C
+25C
-40C
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Frequency (GHz)
Insertion Loss (dB)
+85C
+25C
-
40C
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