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For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - SPDT - SMT
1
HMC284AMS8G / HMC284AMS8GE
v00.0612
SPDT NON-REFLECTIVE SWITCH
DC - 3.5 GHz
General Description
Features
Functional Diagram
High Isolation: >45 dB
Positive control: 0/+5V
Non-Reective Design
Ultra Small Package: MSOP8G
Electrical Specications, TA = +25° C, Vctl = 0/+5 Vdc, 50 Ohm System
Typical Applications
The HMC284AMS8G / HMC284AMS8GE is ideal for:
• Cellular/PCS Base Stations
• 2.4 GHz ISM
• 3.5 GHz Wireless Local Loop
The HMC284AMS8G & HMC284AMS8GE are low-
cost SPDT switches in 8-lead grounded base MSOP
packages. The design has been optimized to provide
high isolation with minimal insertion loss for medium
and low power applications. On-chip circuitry allows
positive voltage control operation at very low DC cur-
rents with control inputs compatible with CMOS and
most TTL logic families. In the “OFF” state, RF1 and
RF2 are non-reective.
Parameter Frequency Min. Typ. Max. Units
Insertion Loss
DC - 2.0 GHz
DC - 3.0 GHz
DC - 3.5 GHz
0.5
0.6
0.7
0.8
0.9
1.1
dB
dB
dB
Isolation
RF1 & RF2
RF1 / RF2
RF1 / RF2
RF1 & RF2
DC - 2.0 GHz
DC - 2.5 GHz
DC - 3.0 GHz
DC - 3.5 GHz
41
38/41
34/36
30
45
44/45
42/45
40
dB
dB
dB
Return Loss (On State)
DC - 2.0 GHz
DC - 2.5 GHz
DC - 3.5 GHz
21
13
10
25
22
17
dB
dB
dB
Return Loss (Off State) 0.5 - 3.5 GHz 10 15 dBm
Input Power for 1 dB Compression 0.5 - 1.0 GHz
0.5 - 3.5 GHz
20
18
30
29
dBm
dBm
Input Third Order Intercept
(Two-Tone Input Power = 0 dBm Each Tone) 0.5 - 3.5 GHz 43 50 dBm
Switching Speed tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to
10/90% RF)
DC - 3.5 GHz
5
20
ns
ns
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - SPDT - SMT
2
HMC284AMS8G / HMC284AMS8GE
v00.0612
SPDT NON-REFLECTIVE SWITCH
DC - 3.5 GHz
Return Loss
Insertion Loss Isolation
-3
-2.5
-2
-1.5
-1
-0.5
0
0 0.5 1 1.5 2 2.5 3 3.5 4
+25 C
-40 C
+85 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
0 0.5 1 1.5 2 2.5 3 3.5 4
RF1
RF2
ISOLATION (dB)
FREQUENCY (GHz)
-45
-40
-35
-30
-25
-20
-15
-10
-5
0
0 0.5 1 1.5 2 2.5 3 3.5 4
S11 (ON)
S22 (ON)
S22 (OFF)
RETURN LOSS (dB)
FREQUENCY (GHz)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - SPDT - SMT
3
HMC284AMS8G / HMC284AMS8GE
v00.0612
SPDT NON-REFLECTIVE SWITCH
DC - 3.5 GHz
Compression vs Frequency
Caution:
Do not operate continuously at RF power input
greater than 1 dB compression. (Vctl = 0/+5 Vdc).
Carrier at 900 MHz Carrier at 1900 MHz
CTL Input Input Power for 0.1 dB
Compression
Input Power for 1.0 dB
Compression
Input Power for 0.1 dB
Compression
Input Power for 1.0 dB
Compression
(Vdc) (dBm) (dBm) (dBm) (dBm)
+5 27 30 27 29
Truth Table
*Control Input Tolerances are ±0.2 Vdc
DC blocks are required at ports RFC, RF1, RF2.
Control Input* Control Current Signal Path State
A
(Vdc)
B
(Vdc)
Ia
(uA)
Ib
(uA)
RFC to
RF1
RFC to
RF2
0+5 -0.2 0.2 ON OFF
+5 00.2 -0.2 OFF ON
Distortion vs Frequency
Control Input Third Order Intercept (dBm)
0 dBm Each Tone
(Vdc) 900 MHz 1900 MHz
+5 50 50
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - SPDT - SMT
4
HMC284AMS8G / HMC284AMS8GE
v00.0612
SPDT NON-REFLECTIVE SWITCH
DC - 3.5 GHz
Absolute Maximum Ratings
RF Input Power (Vctl = 0/+5V) +26 dBm
Control Voltage Range -0.5 to +7.5 Vdc
Hot Switch Power Level
(Vctl = 0/+5V) +18 d Bm
Channel Temperature 150 °C
Thermal Resistance
(Insertion Loss Path) 130 °C/W
Thermal Resistance
(Terminated Path) 252 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC284AMS8G Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H284A
XXXX
HMC284AMS8GE RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H284A
XXXX
[1] Max peak reow temperature of 235 °C
[2] Max peak reow temperature of 260 °C
[3] 4-Digit lot number XXXX
Package Information
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.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - SPDT - SMT
5
HMC284AMS8G / HMC284AMS8GE
v00.0612
SPDT NON-REFLECTIVE SWITCH
DC - 3.5 GHz
Typical Application Circuit
Notes:
1. Set A/B control to 0/+5V, Vdd = +5V and use HCT series logic to provide a TTL driver interface.
2. Control inputs A/B can be driven directly with CMOS logic (HC) with Vdd = +5 Volts applied to the CMOS logic gates.
3. DC blocking capacitors are required for each RF port as shown. Capacitor value determines lowest frequency of operation.
4. Highest RF signal power capability is achieved with Vdd = +7V and A/B set to 0/+7V.
5. Back side paddle must be connected to RF ground.
6. A grounded coplanar waveguide PCB layout technique is recommended to achieve high isolation. The component side
ground plane between RFC/grounded paddle and RF1/RF2 should be continuous, see below. There should be a continuous
ground plane under component side layout.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
SWITCHES - SPDT - SMT
6
HMC284AMS8G / HMC284AMS8GE
v00.0612
SPDT NON-REFLECTIVE SWITCH
DC - 3.5 GHz
Evaluation PCB
The circuit board used in the application should be
generated with proper RF circuit design techniques.
Signal lines at the RF port should have 50 Ohm
impedance and the package ground leads and
package bottom should be connected directly to the
ground plane similar to that shown above. The eval-
uation circuit board shown above is available from
Hittite Microwave Corporation upon request.
List of Materials for Evaluation PCB 105143 [1]
Item Description
J1 - J3 PCB Mount SMA RF Connector
J4 - J6 DC Pin
C1 - C3 100 pF capacitor, 0402 Pkg.
R1, R2 100 Ohm resistor, 0402 Pkg.
U1 HMC284AMS8G / HMC284AMS8GE
SPDT Switch
PCB [2] 107821 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
