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查询HMC348LP3供应商
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MICROWAVE CORPORATION
v04.0604
Typical Applications
The HMC348LP3 is ideal for:
• 75 Ohm Systems
CATV Signal Distribution, Cable Modem
Headend & DBS IF Switching
• 50 Ohm Systems
Basestation Infrastructure & Test Equipment
Functional Diagram
HMC348LP3
GaAs MMIC SPDT NON-REFLECTIVE
CATV SWITCH, DC - 2.5 GHz
Features
High Isolation: >80 dB @ 5 MHz (50 Ohm)
>55 dB @ 1 GHz (50 Ohm)
“All Off” Isolation State
Non-Refl ective Design, 75 Ohm Terminations
3 mm x 3 mm x 1 mm SMT Package
General Description
The HMC348LP3 is a non-refl ective GaAs MESFET
SPDT switch in a low cost leadless QFN surface
mount plastic package ideal for CATV applications.
Covering DC to 2.5 GHz, the switch offers high
isolation, low insertion loss, integrated 75 Ohm terminations and an “all off” state. The switch features
>80 dB isolation at 5 MHz and >55 dB isolation up
to 1 GHz. The switch operates using complementary positive control voltage logic lines of +5/0V and
requires a +5V bias supply (Vdd). This switch offers
excellent performance in both 50 Ohm & 75 Ohm
systems for either SPDT or SPST functions.
Electrical Specifi cations, T
Parameter Frequency Min. Typ. Max. Units
Insertion Loss
Isolation
SWITCHES - SMT
Return Loss “On State” DC - 2500 MHz 15 20 dB
Return Loss RF1, RF2 “Off State”
Input Power for 1 dB Compression
Input Third Order Intercept
(Two-Tone Input Power= 0 dBm Each Tone, 6 MHz Tone Separation)
Input Second Order Intercept
(Two-Tone Input Power= 0 dBm Each Tone, 6 MHz Tone Separation)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
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= +25° C, With 0/+5V Control, 50 Ohm System
A
DC - 1000 MHz
DC - 2500 MHz
DC - 250 MHz
DC - 750 MHz
DC - 1000 MHz
DC - 2000 MHz
DC - 2500 MHz
DC - 1000 MHz
DC - 2500 MHz
50 MHz
1000 MHz
50 MHz
1000 MHz
2500 MHz
50 MHz
1000 MHz
2500 MHz
DC - 2500 MHz 25
63
53
50
47
45
9
8
20
25
0.6
0.7
68
58
55
52
50
12
11
23
28
43
48
51
72
89
80
600
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
0.9
1.0
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
dBm
dBm
dBm
dBm
ns
ns
Page 2
MICROWAVE CORPORATION
v04.0604
HMC348LP3
GaAs MMIC SPDT NON-REFLECTIVE
CATV SWITCH, DC - 2.5 GHz
Insertion Loss, 50 Ohm System
0
-0.5
-1
-1.5
INSERTION LOSS (dB)
-2
0 0.5 1 1.5 2 2.5
+25C
+85C
-40C
FREQUENCY (GHz)
Isolation, 50 Ohm System
0
-10
-20
-30
-40
-50
ISOLATION (dB)
-60
-70
-80
0 0.5 1 1.5 2 2.5
RF1
RF2
ALL OFF
FREQUENCY (GHz)
Insertion Loss, 75 Ohm System
0
-0.5
-1
-1.5
INSERTION LOSS (dB)
-2
0 0.5 1 1.5 2 2.5
FREQUENCY (GHz)
Isolation, 75 Ohm System
0
-10
-20
-30
-40
-50
ISOLATION (dB)
-60
-70
-80
0 0.5 1 1.5 2 2.5
FREQUENCY (GHz)
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Return Loss, 50 Ohm System
0
-5
-10
-15
-20
-25
RETURN LOSS (dB)
-30
-35
0 0.5 1 1.5 2 2.5
RFC
RF1, RF2 ON
RF1, RF2 OFF
FREQUENCY (GHz)
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
Return Loss, 75 Ohm System
0
-5
-10
-15
-20
-25
RETURN LOSS (dB)
-30
-35
0 0.5 1 1.5 2 2.5
Order Online at www.hittite.com
RFC
RF1, RF2 ON
RF1, RF2 OFF
FREQUENCY (GHz)
SWITCHES - SMT
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Page 3
MICROWAVE CORPORATION
Input Compression Point, 50 Ohm System
v04.0604
GaAs MMIC SPDT NON-REFLECTIVE
CATV SWITCH, DC - 2.5 GHz
32
30
28
26
24
22
20
18
16
14
12
INPUT COMPRESSION POINT (dBm)
10
0 0.5 1 1.5 2 2.5
FREQUENCY (GHz)
0.1 dB T=+25C
0.1dB T=+85C
0.1dB T=-40C
1dB T=+25C
1dB T=+85C
1dB T=-40C
HMC348LP3
Absolute Maximum Ratings
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SWITCHES - SMT
Bias Voltage Range (Vdd) +7.0 Vdc
RF Input Power +30 dBm
Control Voltage Range (A & B) +0.5V to Vdd + 1.0 Vdc
Channel Temperature 150 °C
Continuous Pdiss (T = 85 °C)
(derate 4 mW/°C above 85 °C)
Thermal Resistance
(Insertion Loss Path)
Thermal Resistance
(Terminated Path)
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
Control Voltages
State Bias Condition
Low 0 to +0.8V @ 5 uA Typical
High +2.0 to +5.0 Vdc @ 35 uA Typical
0.3 W
104 °C/W
240 °C/W
Bias Voltage & Current
Vdd Range = +5.0 Vdc ±10%
Vdd
(Vdc)
+5.0 1.1 2.2
Idd (Typ.)
(mA)
Truth Table
Control Input Signal Path State
A B RFC to RF1 RFC to RF2
High Low On Off
Low High Off On
Low Low Off Off
Idd (Max.)
(mA)
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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
Page 4
MICROWAVE CORPORATION
Outline Drawing
v04.0604
HMC348LP3
GaAs MMIC SPDT NON-REFLECTIVE
CATV SWITCH, DC - 2.5 GHz
NOTES:
1. MATERIAL PACKAGE BODY: 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. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
6. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
7. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
8. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
9. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB
LAND PATTERN.
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Pin Descriptions
Pin Number Function Description Interface Schematic
1 Vdd Supply Voltage +5V ±10%
2, 4, 5, 6, 9, 12, 15,16 N/C
3, 7, 14 RFC, RF1, RF2
10 B See truth table and control voltage table.
11 A See truth table and control voltage table.
8, 13 ACG1, ACG2
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
These pins should be connected to PCB RF ground
to maximize isolation.
These pins are DC coupled and matched to 75 Ohms.
Blocking capacitors are required.
External capacitors to ground are required.
Select value for optimal isolation below 500 MHz.
Order Online at www.hittite.com
SWITCHES - SMT
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Page 5
MICROWAVE CORPORATION
Application Circuit
v04.0604
HMC348LP3
GaAs MMIC SPDT NON-REFLECTIVE
CATV SWITCH, DC - 2.5 GHz
14
The value of capacitors C1 & C2 are critical for low frequency isolation performance below 500 MHz. 3300 pF 0402 size
capacitors are recommended for optimal isolation down to 5 MHz. If the frequency of operation is above 500 MHz then
100 pF to 300 pF 0402 capacitors will be suffi cient.
SWITCHES - SMT
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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
Page 6
MICROWAVE CORPORATION
Evaluation PCB (50 Ohms)
v04.0604
HMC348LP3
GaAs MMIC SPDT NON-REFLECTIVE
CATV SWITCH, DC - 2.5 GHz
List of Material
Item Description
J1 - J3 PC Mount SMA RF Connector
J4 - J7 DC Pin
R1 - R2 100 Ohm Resistor, 0402 Pkg.
C1, C2, C4 - C7 3300 pF Capacitor, 0402 Pkg.
C3 4.7 uF Tantalum Capacitor
U1 HMC348LP3 SPDT Switch
PCB* 106255 Evaluation PCB
* Circuit Board Material: Rogers 4350
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 impedance and
the package ground leads and package bottom 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.
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SWITCHES - SMT
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
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