12 - 106
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 Online at www.hittite.com
CONNECTORIZED MODULES - VCOs
12
WIDEBAND VCO w/ BUFFER
AMPLIFIER MODULE, 4 - 8 GHz
v01.1007
General Description
Features
Functional Diagram
The HMC-C028 is a wideband GaAs InGaP Voltage
Controlled Oscillator which incorporates the
resonator, negative resistance device, and varactor
diode. An internal voltage regulator provides excellent
0.2 MHz/V frequency pushing while the output buffer
ampli er boosts output power to +20 dBm; which
is enough to drive one or two mixers. Phase noise
performance is excellent over temperature due to the
oscillator’s monolithic construction. The Vtune port
accepts an analog tuning voltage from 0 to +18V. The
HMC-C028 VCO operates from a single +8V to +15V
supply, and is housed in a hermetically sealed module.
This wideband VCO uniquely combines the attributes
of small size, low phase noise, wide tuning range and
high output power.
Wide Tuning Bandwidth
High Output Power: +20 dBm
Low SSB Phase Noise: -95 dBc/Hz @100 kHz
No External Resonator Needed
Single Positive Supply: +8 to +15V @ 185 mA
RoHS Compliant Hermetically Sealed Module
Field Replaceable SMA Connectors
-40°C to +85°C Operating Temperature
Typical Applications
The HMC-C028 VCO Module is ideal for:
• Industrial/Medical Equipment
• Test & Measurement Equipment
• Military Radar, EW & ECM
• Lab Instrumentation
Electrical Speci cations, TA = +25° C, Vdc = +12V
Parameter Min. Typ. Max. Min. Typ. Max. Units
Frequency Range 4.0 - 8.0 5.0 - 8.0 GHz
Power Output 16 20 17 20 dBm
SSB Phase Noise @ 100 kHz Offset -95 -95 dBc/Hz
SSB Phase Noise @ 10 kHz Offset -75 -75 dBc/Hz
Tune Voltage (Vtune) 0 18 3 18 V
Supply Current (Idc) (Vdc = +12V) 185 185 mA
Tune Port Leakage Current (Vtune = +15V) 10 10 μA
Output Return Loss 15 15 dB
2nd Harmonic -10 -10 dBc
Pulling (into a 2.0:1 VSWR) 1 1 MHz pp
Pushing @ Vtune= +5V 0.2 0.2 MHz/V
Frequency Drift Rate 0.8 0.8 MHz/°C
HMC-C028
12 - 107
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 Online at www.hittite.com
CONNECTORIZED MODULES - VCOs
12
Frequency vs. Tuning Voltage, Vdc = +12V
Sensitivity vs. Tuning Voltage, Vcc = +12V
Typical SSB Phase Noise @ Vtune = +12V
SSB Phase Noise vs. Tuning Voltage
Output Power vs.
Tuning Voltage, Vcc = +12V
Frequency vs. Tuning Voltage, T = +25°C
3
4
5
6
7
8
9
0 2 4 6 8 10 12 14 16 18 20
+25C
+85C
-40C
OUTPUT FREQUENCY (GHz)
TUNING VOLTAGE (VOLTS)
-120
-100
-80
-60
-40
-20
0
102103104105106
+25C
+85C
-40C
SSB PHASE NOISE (dBc/Hz)
OFFSET FREQUENCY (Hz)
-120
-100
-80
-60
-40
-20
0
0 2 4 6 8 10 12 14 16 18 20
10 kHz
100 kHz
SSB PHASE NOISE (dBc/Hz)
TUNING VOLTAGE (VOLTS)
8
10
12
14
16
18
20
22
24
0 2 4 6 8 10 12 14 16 18 20
+25C
+85C
-40C
OUTPUT POWER (dBm)
TUNING VOLTAGE (VOLTS)
0
100
200
300
400
0 2 4 6 8 10 12 14 16 18 20
+25C
+85C
-40C
SENSITIVITY (MHz/VOLT)
TUNING VOLTAGE (VOLTS)
3
4
5
6
7
8
9
0 2 4 6 8 10 12 14 16 18 20
11V
12V
13V
OUTPUT FREQUENCY (GHz)
TUNING VOLTAGE (VOLTS)
HMC-C028
v01.1007
WIDEBAND VCO w/ BUFFER
AMPLIFIER MODULE, 4 - 8 GHz
12 - 108
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 Online at www.hittite.com
CONNECTORIZED MODULES - VCOs
12 Outline Drawing
NOTES:
1. PACKAGE, LEADS, COVER MATERIAL: KOVAR™
2. BRACKET MATERIAL: ALUMINUM.
3. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MIN.,
OVER ELECTROLYTIC NICKEL 75 MICROINCHES MIN.
4. ALL DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. TOLERANCES: ±.010 [0.25] UNLESS OTHERWISE SPECIFIED.
6. MARK LOT NUMBER ON LABEL WHERE SHOWN,
WITH .030” MIN TEXT HEIGHT.
HMC-C028
v01.1007
WIDEBAND VCO w/ BUFFER
AMPLIFIER MODULE, 4 - 8 GHz
Package Information
Package Type C-1
Package Weight [1] 10.2 gms [2]
Spacer Weight N/A
[1] Includes the connectors
[2] ±1 gms Tolerance
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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 Online at www.hittite.com
CONNECTORIZED MODULES - VCOs
12
Pin Number Function Description Interface Schematic
1 RFOUT RF output (AC coupled) uses a female SMA connector.
2 Vdc Supply Voltage Vdc = +8V to +15V.
3VTUNE
Control Voltage and Modulation Input uses a female
SMA connector. Modulation bandwidth dependent on
drive source impedance. See “Determining the FM
Bandwidth of a Wideband Varactor Tuned VCO” appli-
cation note.
4 GND Must be connected to power supply ground.
Pin Descriptions
Absolute Maximum Ratings
Vdc -0.3 Vdc to +25 Vdc
Vtune 0 to +22V
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
HMC-C028
v01.1007
WIDEBAND VCO w/ BUFFER
AMPLIFIER MODULE, 4 - 8 GHz
