MICROWAVE CORPORATION
14 - 146
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
HMC270MS8G
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8.0 GHz
v02.0701
General Description
Features
Functional Diagram
Broadband Performance: DC - 8 GHz
Very High Isolation: 45 dB @ 6 GHz
Non-Refl ective Design
Low Cost MSOP-8 Package: 14.8 mm
2
Electrical Specifi cations,
T
A
= +25 C, With 0/-5V Control, 50 Ohm system
Typical Applications
The HMC270MS8G is ideal for
DC - 8.0 GHz applications:
CATV
MMDS & WirelessLAN
Wireless Local Loop
The HMC270MS8G is a broadband non-refl ective
GaAs SPDT switch in an 8 lead MSOP grounded
base surface mount plastic package. Covering
DC to 8 GHz, the switch offers excellent isolation
from 70 to 35 dB. The negative control voltage of
-5 volts allows operation down to DC. If positive
control is required along with high isolation, see
the DC to 3.5 GHz HMC284MS8G non-refl ective
SPDT.
Parameter
Frequency
Min.
Typ.
Max.
Units
Insertion Loss
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
0.8
1.0
1.5
1.2
1.7
2.4
dB
dB
dB
Isolation
DC - 2.0 GHz
DC - 4.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
43
42
37
28
48
47
45
33
dB
dB
dB
dB
Return Loss
"On State"
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
11
9
7
14
12
10
dB
dB
dB
Return Loss RF1, RF2
"Off State"
DC - 2.0 GHz
DC - 6.0 GHz
DC - 8.0 GHz
15
13
10
20
18
15
dB
dB
dB
Input Power for 1 dB Compression
0.5 - 8.0 GHz
20
23
dBm
Input third Order Intercept
(Two-Tone Input Power = +7 dBm Each Tone)
0.5 - 8.0 GHz
33
36
dBm
Switching Characteristics
DC - 8.0 GHz
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
20
50
ns
ns
MICROWAVE CORPORATION
14 - 147
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
-5
-4
-3
-2
-1
0
0
1
2
3
4
5
6
7
8
9
RF1
RF2
INSERTION LOSS (dB)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
0
1
2
3
4
5
6
7
8
9
RFC
RF1,2 On
RF1,2 Off
RETURN LOSS (dB)
FREQUENCY (GHz)
GaAs MMIC SUB-HARMONICALLY PUMPED MIXER 17 - 25 GHz
HMC270MS8G
Return Loss
Insertion Loss
Isolation
v02.0701
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8.0 GHz
-70
-60
-50
-40
-30
-20
-10
0
0
1
2
3
4
5
6
7
8
9
RF1
RF2
ISOLATION (dB)
FREQUENCY (GHz)
0.1 and 1 dB Input Compression Point
Input Third Order Intercept Point
18
19
20
21
22
23
24
25
26
0
1
2
3
4
5
6
7
8
9
1 dB Compression Point
0.1 dB Compression Point
COMPRESSION POINT (dBm)
FREQUENCY (GHz)
25
30
35
40
45
0
1
2
3
4
5
6
7
8
9
THIRD ORDER INTERCEPT (dBm)
FREQUENCY (GHz)
Truth Table
Control Voltages
RFC, RF1, & RF2 should be at <100 mV DC potential.
Otherwise, DC blocking capacitors are recommended.
Choose value for lowest frequency of operation.
Do not "HOT" switch power levels >+13 dBm (Vctl = 0/-5Vdc)
Control Input
Signal Path State
A
B
RFC to RF1
RFC to RF2
High
Low
ON
OFF
Low
High
OFF
ON
State
Bias Condition
Low
0 to -0.2V @ 10 uA Typ.
High
-5V @ 35 uA Typ. to -7V @ 100 uA Typ (0.5 Vdc)
MICROWAVE CORPORATION
14 - 148
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
v02.0701
HMC270MS8G
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8.0 GHz
Absolute Maximum Ratings
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEADFRAME MATERIAL: COPPER ALLOY
3. LEADFRAME 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.
Max RF Input Power, Vctl = -5V
+24 dBm
Control Voltage Range
+0.5 to -7.5 Vdc
Storage Temperature
-65 to +150 C
Operating Temperature
-40 to +85 C
Suggested Driver Circuit for HMC270MS8G
Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current while translating from stan-
dard positive voltage TTL or CMOS logic to negative voltage GaAs IC logic.
MICROWAVE CORPORATION
14 - 149
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
v02.0701
HMC270MS8G
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8.0 GHz
Eval Board Layout (Top View)
The circuit board used in the fi nal application should
be generated with proper RF circuit design techniques.
Signal lines at the RF ports should have 50 ohm imped-
ance and the package ground leads and exposed ground
paddle should be connected directly to the ground plane
similar to that shown above. The evaluation circuit board
shown above is available from Hittite Microwave Corpo-
ration upon request.
List of Materials
*R1 = R2 = 100 Ohm.
These are optional resistors.
Item
Description
J1 - J3
PC Mount SMA Connector
J4 - J5
DC Pin
C1 - C3
Chip Capacitor, 0402 Pkg, choose value for lowest
frequency of operation. PCBs are provided with 100
~ 300 pF capacitors. User may jumper capacitor
mounting gaps on PCB to allow operation to "DC".
R1 - R2
100 Ohm Resistor, 0402 Pkg.
U1
HMC270MS8G SPDT Switch
PCB*
102807 Evaluation PCB 2.0" x 2.6"
* Circuit Board Material: Rogers 4350
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