SWITCHES - SMT
10
10 - 144
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC270MS8G / 270MS8GE
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8 GHz
v04.0607
General Description
Features
Functional Diagram
Broadband Performance: DC - 8 GHz
Very High Isolation: 45 dB @ 6 GHz
Non-Re ective Design
Low Cost MSOP-8 Package: 14.8 mm2
Electrical Speci cations, TA = +25° C, With 0/-5V Control, 50 Ohm system
Typical Applications
The HMC270MS8G / HMC270MS8GE is ideal for
DC - 8.0 GHz applications:
• CATV
• MMDS & WirelessLAN
• Wireless Local Loop
The HMC270MS8G & HMC270MS8GE are broad-
band non-re ective GaAs SPDT switches in 8
lead MSOP grounded base surface mount plastic
packages. 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-
re 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
SWITCHES - SMT
10
10 - 145
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC270MS8G / 270MS8GE
Return Loss
Insertion Loss Isolation
v04.0607
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8 GHz
0.1 and 1 dB Input Compression Point
Input Third Order Intercept Point
-5
-4
-3
-2
-1
0
0123456789
RF1
RF2
INSERTION LOSS (dB)
FREQUENCY (GHz)
25
30
35
40
45
0123456789
THIRD ORDER INTERCEPT (dBm)
FREQUENCY (GHz)
18
20
22
24
26
0123456789
1 dB Compression Point
0.1 dB Compression Point
COMPRESSION POINT (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
0123456789
RFC
RF1,2 On
RF1,2 Off
RETURN LOSS (dB)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
0123456789
RF1
RF2
ISOLATION (dB)
FREQUENCY (GHz)
SWITCHES - SMT
10
10 - 146
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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)
HMC270MS8G / 270MS8GE
v04.0607
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8 GHz
SWITCHES - SMT
10
10 - 147
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Absolute Maximum Ratings
Outline Drawing
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
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC70MS8G Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H270
XXXX
HMC270MS8GE RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H270
XXXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
HMC270MS8G / 270MS8GE
v04.0607 GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8 GHz
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS].
3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE.
4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE.
5. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO
PCB RF GROUND.
SWITCHES - SMT
10
10 - 148
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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.
HMC270MS8G / 270MS8GE
v04.0607
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8 GHz
SWITCHES - SMT
10
10 - 149
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
Eval Board Layout (Top View)
The circuit board used in the  nal application should
be generated with proper RF circuit design tech-
niques. Signal lines at the RF ports should have
50 ohm impedance 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 Corporation upon
request.
List of Materials for Evaluation PCB 107949 [1]
*R1 = R2 = 100 Ohm.
These are optional resistors.
Item Description
J1 - J3 PCB Mount SMA Connector
J4 - J5 DC Pin
C1 - C3
Chip Capacitor, 0402 Pkg, choose value for
lowest frequency of operation. PCBs are pro-
vided 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 / HMC270MS8GE
SPDT Switch
PCB [2] 102807 Evaluation PCB 2.0” x 2.6”
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
HMC270MS8G / 270MS8GE
v04.0607
GaAs MMIC SPDT SWITCH
NON-REFLECTIVE, DC - 8 GHz