HITTITE HMC346LC3B

HMC346LC3B
v05.1208
ATTENUATORS - ANALOG - SMT
5
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Typical Applications
Features
The HMC346LC3B is ideal for:
Wide Bandwidth: DC - 18 GHz
• Test Instrumentation
Low Phase Shift vs. Attenuation
• Fiber Optics & Broadband Telecom
30 dB Attenuation Range
• Microwave Radio & VSAT
Simplified Voltage Control
• Military Radios, Radar, & ECM
RoHS Compliant 3 x 3 mm SMT Package
Functional Diagram
General Description
The HMC346LC3B is an absorptive Voltage Variable
Attenuator (VVA) in a leadless “Pb free” RoHS compliant SMT mount ceramic package operating from
DC - 18 GHz. It features an on-chip reference attenuator for use with an external op-amp to provide
simple single voltage attenuation control, 0 to -3V.
The device is ideal in designs where an analog DC
control signal must control RF signal levels over a
30 dB amplitude range. The HMC346LC3B allows
the use of surface mount manufacturing techniques.
Electrical Specifi cations, TA = +25° C, 50 Ohm system
Parameter
Insertion Loss
DC - 10 GHz
DC - 14 GHz
DC - 18 GHz
Attenuation Range
DC - 12 GHz
DC - 18 GHz
Return Loss
Max
Units
1.5
2.2
2.8
2.0
2.7
3.5
dB
dB
dB
dB
dB
DC - 18 GHz
10
dB
Input Power for 0.25 dB Compression (0.5 - 18 GHz)
Min. Atten:
Atten. >2 dB:
+8
-4
dBm
dBm
Input Third Order Intercept (0.5 - 18 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten:
Atten. >2 dB:
+25
+10
dBm
dBm
2
8
ns
ns
tRISE, tFALL (10/90% RF):
tON, tOFF (50% CTL to 10/90% RF):
26
22
Typical
30
26
Switching Characteristics
5 - 80
Min
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
HMC346LC3B
v05.1208
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
-1
-10
-2
+25C
+85C
-40C
-4
-20
-30
-40
0
2
4
6
8
10
12
14
16
18
0
2
4
FREQUENCY (GHz)
10
12
14
16
18
Relative Attenuation vs.
Control Voltage @ 10 GHz
0
0
-5
-0.5
CONTROL VOLTAGE (Vdc)
RETURN LOSS (dB)
8
FREQUENCY (GHz)
Return Loss vs. Attenuation
-10
-15
-20
-25
MIN
5 dB
MAX
-30
V1
V2
-1
-1.5
-2
-2.5
-3
-35
0
2
4
6
8
10
12
14
16
0
18
5
10
15
20
25
30
RELATIVE ATTENUATION (dB)
FREQUENCY (GHz)
Relative Phase vs. Attenuation
Input IP3 vs. Attenuation*
30
180
5 dB
10dB
15dB
20dB
25dB
30dB
Max
120
25
20
IP3 (dBm)
150
RELATIVE PHASE (deg)
6
ATTENUATORS - ANALOG - SMT
0
ATTENUATION (dB)
INSERTION LOSS (dB)
0
-3
5
Relative Attenuation
Insertion Loss vs. Temperature
90
15
60
10
30
5
0
0 dB
3 dB
6 dB
10 dB
0
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
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
5 - 81
HMC346LC3B
v05.1208
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
Second Harmonic
vs. Attenuation, Pin = -8 dBm
Input IP2 vs. Attenuation*
80
60
70
SECOND HARMONIC (dBc)
70
IP2 (dBm)
50
40
30
0 dB
3 dB
6 dB
10 dB
20
10
60
50
40
0 dB
3 dB
6 dB
10 dB
30
20
0
2
4
6
8
10
12
14
16
18
0
2
4
FREQUENCY (GHz)
8
10
12
14
10
15
INPUT P1dB (dBm)
20
0 dB (REF)
6 dB
0
-5
18
10
5
0 dB (REF)
6 dB
0
-10
-5
0
2
4
6
8
10
12
14
16
18
FREQUENCY (GHz)
0
2
4
6
8
10
12
14
FREQUENCY (GHz)
*Two-tone input power = -8 dBm each tone, 1 MHz spacing.
5 - 82
16
1 dB Compression vs. Attenuation
15
5
6
FREQUENCY (GHz)
0.25 dB Compression vs. Attenuation
INPUT 0.25dB (dBm)
ATTENUATORS - ANALOG - SMT
5
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
16
18
HMC346LC3B
v05.1208
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
5
RF Input Power
+18 dBm
Control Voltage Range
+1 to -5V
Storage Temperature
-65 to +150 °C
Operating Temperature
-40 to +85 °C
ESD Sensitivity (HBM)
Class 1A
ATTENUATORS - ANALOG - SMT
Absolute Maximum Ratings
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA
2. LEAD AND GROUND PADDLE PLATING: GOLD FLASH OVER Ni
3. DIMENSIONS ARE IN INCHES [MILLIMETERS]
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND
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
5 - 83
HMC346LC3B
v05.1208
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
ATTENUATORS - ANALOG - SMT
5
Pin Descriptions
Pin Number
Function
Description
1, 3, 7, 9
GND
Package bottom has exposed metal paddle that must also be
connected to PCB RF ground.
2, 8
RF1
RF2
This pin is DC coupled and matched to 50 Ohm. Blocking
capacitors are required if the RF line potential is not equal to
0V.
4, 6
V2, V1
Control input (master).
5
I
Control input (slave).
10, 11, 12
N/C
This pin may be connected to PCB RF/DC ground.
Performance will not be affected.
Interface Schematic
Single-Line Control Driver
External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges from 0 Volts
(min. attenuation) to -3.0 Volts (max. attenuation.)
5 - 84
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
HMC346LC3B
v05.1208
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 18 GHz
5
ATTENUATORS - ANALOG - SMT
Evaluation PCB
List of Materials for Evaluation PCB 109741 [1]
Item
Description
J1 - J2
PCB Mount SMA RF Connector
J3 - J7
DC Pin
U1
HMC346LC3B VVA
PCB [2]
109739-1 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
The circuit board used in the final application
should be generated with proper RF circuit design
techniques. Signal lines at the RF ports should be
50 ohm impedance and the package ground leads
and package bottom should be connected directly
to the PCB RF ground plane, similar to that shown
above. The evaluation circuit board shown above is
available from Hittite Microwave Corporation upon
request.
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
5 - 85