MICROWAVE CORPORATION
14 - 230
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
SWITCHES - SMT
14
HMC349MS8G
HIGH ISOLATION SPDT
NON-REFLECTIVE SWITCH, DC - 4.0 GHz
v00.0304
General Description
Features
Functional Diagram
High Isolation: 70 dB @ 1 GHz
57 dB @ 2 GHz
Single Positive Control: 0/+5V
+52 dBm Input IP3
Non-Refl ective Design
All Off State
Ultra Small MS8G SMT Package: 14.8 mm
2
Typical Applications
The HMC349MS8G is ideal for:
Basestation Infrastructure
MMDS & 3.5 GHz WLL
CATV/CMTS
Test Instrumentation
The HMC349MS8G is a high isolation non-
refl ective DC to 4 GHz GaAs MESFET SPDT
switch in a low cost 8 lead MSOP8G surface
mount package with an exposed ground paddle.
The switch is ideal for cellular/PCS/3G basestation
applications yielding 50 to 60 dB isolation, low 0.8
dB insertion loss and +52 dBm input IP3. Power
handling is excellent up through the 3.5 GHz WLL
band with the switch offering a P1dB compression
point of +31 dBm. On-chip circuitry allows a
single positive voltage control of 0/+5 Volts at very
low DC currents. An enable input (EN) set to logic
high will put the switch in an "all off" state.
Electrical Specifi cations,
T
A
= +25 C, Vctl = 0/+5 Vdc, Vdd = +5 Vdc, 50 Ohm System
Parameter
Frequency
Min.
Typ.
Max.
Units
Insertion Loss
DC - 1.0 GHz
DC - 2.0 GHz
DC - 3.0 GHz
DC - 4.0 GHz
0.8
0.9
1.2
1.8
1.1
1.2
1.5
2.1
dB
dB
dB
dB
Isolation (RFC to RF1/RF2)
DC - 1.0 GHz
DC - 2.0 GHz
DC - 3.0 GHz
DC - 4.0 GHz
60
54
45
42
70
57
50
47
dB
dB
dB
dB
Return Loss (On State)
DC - 1.0 GHz
DC - 2.0 GHz
DC - 3.0 GHz
DC - 4.0 GHz
23
18
13
8
dB
dB
dB
dB
Return Loss (Off State)
0.5 - 2.0 GHz
0.5 - 3.0 GHz
0.5 - 4.0 GHz
20
17
14
dB
dB
dB
Input Power for 1 dB Compression
0.25 - 4.0 GHz
27
31
dBm
Input Third Order Intercept
(Two-Tone Input Power = +7 dBm Each Tone)
0.25 - 1.0 GHz
1.0 - 2.0 GHz
2.0 - 3.0 GHz
3.0 - 4.0 GHz
53
50
49
47
dBm
dBm
dBm
dBm
Switching Speed
DC - 4.0 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
40
120
ns
ns
MICROWAVE CORPORATION
14 - 231
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
14
SWITCHES - SMT
GaAs MMIC SUB-HARMONICALLY PUMPED MIXER 17 - 25 GHz
HMC349MS8G
HIGH ISOLATION SPDT
NON-REFLECTIVE SWITCH, DC - 4.0 GHz
v00.0304
Return Loss
Insertion Loss
Isolation Between
Ports RFC and RF1 / RF2
0.1 and 1 dB Input Compression Point
Input Third Order Intercept Point
Isolation Between Ports RF1 and RF2
-5
-4
-3
-2
-1
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
+25C
+85C
-40C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-30
-25
-20
-15
-10
-5
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
RFC
RF1, RF2 ON
RF1, RF2 OFF
RETURN LOSS (dB)
FREQUENCY (GHz)
-80
-70
-60
-50
-40
-30
-20
-10
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
RF1
RF2
ALL OFF
ISOLATION (dB)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
ISOLATION (dB)
FREQUENCY (GHz)
20
22
24
26
28
30
32
34
0
1
2
3
4
0.1 dB Compression Point
1 dB Compression Point
INPUT COMPRESSION (dBm)
FREQUENCY (GHz)
40
42
44
46
48
50
52
54
56
58
60
0
1
2
3
4
+25C
+85C
-40C
IIP3 (dBm)
FREQUENCY (GHz)
Note: RFC is refl ective in "all off" state.
MICROWAVE CORPORATION
14 - 232
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
SWITCHES - SMT
14
HMC349MS8G
HIGH ISOLATION SPDT
NON-REFLECTIVE SWITCH, DC - 4.0 GHz
v00.0304
Truth Table
Absolute Maximum Ratings
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY
3. LEAD AND GROUND PADDLE PLATING: Sn/Pb SOLDER
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
6. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
7. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
Control Input
Signal Path State
Vctl
EN
RFC - RF1
RFC - RF2
Low
Low
OFF
ON
High
Low
ON
OFF
Low
High
OFF
OFF
High
High
OFF
OFF
Outline Drawing
RF Input Power (Vctl = 0V/+5V)
(0.25 - 4 GHz)
+30 dBm (T = +85 C)
Supply Voltage Range (Vdd)
+7 Vdc
Control Voltage Range (Vctl)
-1V to Vdd +1V
Hot Switch Power Level
(Vdd = +5V)
+30 dBm
Channel Temperature
150 C
Continuous Pdiss (T = 85 C)
(derate 12 mW/C above 85 C)
0.75 W
Thermal Resistance
87 C/W
Storage Temperature
-65 to +150 C
Operating Temperature
-40 to +85 C
Note: DC blocking capacitors are required at ports RFC,
RF1 and RF2. Their value will determine the lowest trans-
mission frequency.
State
Bias Condition
Low
0 to +0.8 Vdc @ <1 A Typical
High
+2.0 to +5.0 Vdc @ 30 A Typical
Vdd Range = +5.0 Vdc 10%
Vdd
(Vdc)
Idd (Typ.)
(mA)
Idd (Max.)
(mA)
+5.0
2.3
5.0
Bias Voltage & Current
TTL/CMOS Control Voltages
MICROWAVE CORPORATION
14 - 233
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
14
SWITCHES - SMT
HMC349MS8G
HIGH ISOLATION SPDT
NON-REFLECTIVE SWITCH, DC - 4.0 GHz
v00.0304
Pin Descriptions
Pin Number
Function
Description
Interface Schematic
1
Vdd
Supply Voltage.
2
Vctl
Control input. See truth and control voltage tables.
3, 5, 8
RFC, RF1, RF2
These pins are DC coupled and matched to 50 Ohms.
Blocking capacitors are required.
4
EN
Enable. See truth and control voltage tables.
6, 7
GND
Package bottom must also be connected to
PCB RF ground.
MICROWAVE CORPORATION
14 - 234
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
SWITCHES - SMT
14
HMC349MS8G
HIGH ISOLATION SPDT
NON-REFLECTIVE SWITCH, DC - 4.0 GHz
v00.0304
Evaluation PCB
The circuit board used in the fi nal application should
be generated with proper RF circuit design techniques.
Signal lines at the RF port should have 50 ohm imped-
ance and the package ground leads and backside
ground slug should be connected directly to the ground
plane similar to that shown above. The evaluation circuit
board shown above is available from Hittite Microwave
Corporation upon request.
List of Material for Evaluation PCB 107662*
Item
Description
J1 - J3
PC Mount SMA RF Connector
J4 - J8
DC Pin
C1 - C3
100 pF Capacitor, 0402 Pkg.
U1
HMC349MS8G SPDT Switch
PCB**
107660 Evaluation PCB
** Circuit Board Material: Rogers 4350
* Reference this number when ordering complete evaluation PCB.
MICROWAVE CORPORATION
14 - 235
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
14
SWITCHES - SMT
HMC349MS8G
HIGH ISOLATION SPDT
NON-REFLECTIVE SWITCH, DC - 4.0 GHz
v00.0304
Notes:
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