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HMC431LP4
v02.0604
MICROWAVE CORPORATION
MMIC VCO w/ BUFFER
AMPLIFIER, 5.5 - 6.1 GHz
Typical Applications
Features
Low noise MMIC VCO w/Buffer Amplifier
for C-Band applications such as:
Pout: +2 dBm
• 802.11a & HiperLAN WLAN
No External Resonator Needed
• VSAT Radios
Single Supply: 3V @ 27 mA
• UNII & Pt to Pt Radios
16mm2 Leadless SMT Package
Functional Diagram
General Description
The HMC431LP4 is a GaAs InGaP Heterojunction
Bipolar Transistor (HBT) MMIC VCO with
integrated resonator, negative resistance device,
varactor diode, and buffer amplifier. The VCO’s
phase noise performance is excellent over
temperature, shock, vibration and process due to
the oscillator’s monolithic structure. Power output
is 2 dBm typical from a 3.0V supply voltage. The
voltage controlled oscillator is packaged in a
low cost leadless QFN 4 x 4 mm surface mount
package.
15
VCOs - SMT
Phase Noise: -102 dBc/Hz @100 kHz
Electrical Specifications, TA = +25° C, Vcc = +3V
Parameter
Min.
Frequency Range
Power Output
-1
SSB Phase Noise @ 100 kHz Offset, Vtune= +5V @ RF Output
Tune Voltage (Vtune)
Supply Current (Icc) (Vcc= 3.0V)
Typ.
Units
5.5 - 6.1
GHz
2
dBm
-102
dBc/Hz
0
10
27
Tune Port Leakage Current
Output Return Loss
Max.
V
mA
10
µA
6
dB
-15
-30
dBc
dBc
Pulling (into a 2.0:1 VSWR)
9
MHz pp
Pushing @ Vtune= +5V
12
MHz/V
Frequency Drift Rate
0.8
MHz/°C
Harmonics
2nd
3rd
HMC431LP4
v02.0604
MICROWAVE CORPORATION
MMIC VCO w/ BUFFER
AMPLIFIER, 5.5 - 6.1 GHz
Frequency vs. Tuning Voltage, Vcc= +3V
6.6
6.6
6.4
6.4
OUTPUT FREQUENCY (GHz)
6.2
6
5.8
5.6
5.4
Vcc= 2.75V
Vcc= 3.0V
Vcc= 3.25V
5.2
5
6.2
6
5.8
5.6
5.4
+25 C
+85 C
-40 C
5.2
5
4.8
4.8
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
TUNING VOLTAGE (VOLTS)
Sensitivity vs. Tuning Voltage, Vcc= +3V
6
7
8
9
10
10
450
8
+25 C
+85 C
-40 C
400
350
OUTPUT POWER (dBm)
SENSITIVITY (MHz/VOLT)
5
Output Power vs.
Tuning Voltage, Vcc= +3V
500
300
250
200
150
100
6
2
0
-2
-4
-8
-10
2
3
4
5
6
7
8
9
10
+25 C
+85 C
-40 C
-6
0
1
15
4
50
0
0
1
2
3
TUNING VOLTAGE (VOLTS)
SSB PHASE NOISE (dBc/Hz)
-75
-80
-85
10kHz offset
100kHz offset
-95
-100
-105
-110
0
1
2
3
4
5
6
7
TUNING VOLTAGE (VOLTS)
5
6
7
8
9
10
Typical SSB Phase Noise @ Vtune= +5V
-70
-90
4
TUNING VOLTAGE (VOLTS)
Phase Noise vs. Tuning Voltage
SSB PHASE NOISE (dBc/Hz)
4
TUNING VOLTAGE (VOLTS)
8
9
10
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
3
10
+25 C
+85 C
-40 C
10
4
10
5
10
OFFSET FREQUENCY (Hz)
6
10
7
VCOs - SMT
OUTPUT FREQUENCY (GHz)
Frequency vs. Tuning Voltage, T= 25°C
MICROWAVE CORPORATION
HMC431LP4
v02.0604
MMIC VCO w/ BUFFER
AMPLIFIER, 5.5 - 6.1 GHz
Absolute Maximum Ratings
Typical Supply Current vs. Vcc
Vcc
+3.5 Vdc
Vcc (V)
Icc (mA)
Vtune
0 to +11V
2.75
19
Channel Temperature
135 °C
3.0
27
Continuous Pdiss (T = 85°C)
(derate 6.28 mW/°C above 85°C)
3.25
34
565 W
Storage Temperature
-65 to +150 °C
Operating Temperature
-40 to +85 °C
Note: VCO will operate over full voltage range shown above.
Outline Drawing
VCOs - SMT
15
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.
HMC431LP4
v02.0604
MICROWAVE CORPORATION
MMIC VCO w/ BUFFER
AMPLIFIER, 5.5 - 6.1 GHz
Pin Descriptions
Pin Number
Function
Description
1 - 14, 17 19, 21, 23, 24
N/C
No Connection
15
GND
This pin must be connected to RF & DC ground.
16
RFOUT
RF output (AC coupled)
20
Vcc
Supply Voltage Vcc= 3V
VTUNE
Control Voltage Input. Modulation port bandwidth
dependent on drive source impedance.
GND
Package bottom has an exposed metal paddle that
must be RF & DC grounded.
Interface Schematic
22
VCOs - SMT
15
v02.0604
MICROWAVE CORPORATION
HMC431LP4
MMIC VCO w/ BUFFER
AMPLIFIER, 5.5 - 6.1 GHz
Evaluation PCB
15
VCOs - SMT
List of Materials
Item
Description
J1 - J2
PC Mount SMA RF Connector
J3 - J4
DC Pin
C1
4.7 µF Tantalum Capacitor
C2
10,000 pF Capacitor, 0603 Pkg.
U1
HMC431LP4 VCO
PCB*
105667 Eval Board
* Circuit Board Material: Rogers 4350
The circuit board used in the final application should
use RF circuit design techniques. Signal lines should
have 50 ohm impedance while the package ground
leads and exposed paddle should be connected
directly to the ground plane similar to that shown. A
sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board shown is available from Hittite upon
request.
v02.0604
MICROWAVE CORPORATION
HMC431LP4
MMIC VCO w/ BUFFER
AMPLIFIER, 5.5 - 6.1 GHz
Notes:
VCOs - SMT
15