VCOS & PLOs - SMT
11
11 - 14
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
General Description
Features
Functional Diagram
The HMC385LP4 & HMC385LP4E are GaAs InGaP
Heterojunction Bipolar Transistor (HBT) MMIC VCOs
with integrated resonators, negative resistance
devices, varactor diodes, and buffer ampli ers.
Covering 2.25 to 2.5 GHz, the VCO’s phase noise
performance is excellent over temperature, shock,
vibration and process due to the oscillator’s monolithic
structure. Power output is 4.5 dBm typical from a
single supply of 3V @ 35mA. The voltage controlled
oscillator is packaged in a low cost leadless QFN
4x4 mm surface mount package.
Pout: +4.5 dBm
Phase Noise: -115 dBc/Hz @100 KHz
No External Resonator Needed
Single Supply: 3V @ 35 mA
QFN Leadless SMT Package, 16 mm2
Typical Applications
Low noise MMIC VCO w/Buffer Ampli er for:
• Wireless Infrastructure
• Industrial Controls
• Test Equipment
• Military
Electrical Speci cations, TA = +25° C, Vcc = +3V
Parameter Min. Typ. Max. Units
Frequency Range 2.25 - 2.5 GHz
Power Output 1.5 4.5 dBm
SSB Phase Noise @ 100 kHz Offset, Vtune= +5V @ RF Output -115 dBc/Hz
Tune Voltage (Vtune) 0 10 V
Supply Current (Icc) (Vcc = +3.0V) 35 mA
Tune Port Leakage Current 10 μA
Output Return Loss 9dB
Harmonics
2nd
3rd
-7
-23
dBc
dBc
Pulling (into a 2.0:1 VSWR) 2.0 MHz pp
Pushing @ Vtune= +5V -2 MHz/V
Frequency Drift Rate 0.25 MHz/°C
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
v02.0705
HMC385LP4 / 385LP4E
VCOS & PLOs - SMT
11
11 - 15
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
Frequency vs. Tuning Voltage, T= 25°C
Sensitivity vs. Tuning Voltage, Vcc= +3V
Typical SSB Phase Noise @ Vtune= +5V
Phase Noise vs. Tuning Voltage
Frequency vs. Tuning Voltage, Vcc= +3V
Output Power vs.
Tuning Voltage, Vcc= +3V
2
2.1
2.2
2.3
2.4
2.5
2.6
012345678910
Vcc=2.75V
Vcc=3.0V
Vcc=3.25V
OUTPUT FREQUENCY (GHz)
TUNING VOLTAGE (VOLTS)
2
2.1
2.2
2.3
2.4
2.5
2.6
012345678910
+25 C
+85 C
-40 C
OUTPUT FREQUENCY (GHz)
TUNING VOLTAGE (VOLTS)
0
20
40
60
80
100
120
140
160
180
+25 C
+85 C
-40 C
012345678910
SENSITIVITY (MHz/VOLT)
TUNING VOLTAGE (VOLTS)
0
1
2
3
4
5
6
7
8
+25 C
+85 C
-40 C
012345678910
OUTPUT POWER (dBm)
TUNING VOLTAGE (VOLTS)
-120
-115
-110
-105
-100
-95
-90
-85
-80
012345678910
10 KHz Offset
100 KHz Offset
SSB PHASE NOISE (dBc/Hz)
TUNING VOLTAGE (VOLTS)
-150
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
103104105106107
+25 C
+85 C
-40 C
SSB PHASE NOISE (dBc/Hz)
OFFSET FREQUENCY (Hz)
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
v02.0705
HMC385LP4 / 385LP4E
VCOS & PLOs - SMT
11
11 - 16
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
Absolute Maximum Ratings
Outline Drawing
Vcc +3.5 Vdc
Vtune 0 to +11V
Channel Temperature 135 °C
Continuous Pdiss (T = 85°C)
(derate 6.28 mW/°C above 85°C) 565 W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
Typical Supply Current vs. Vcc
Note: VCO will operate over full voltage range shown above.
Vcc (V) Icc (mA)
2.75 28
3.0 35
3.25 41
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC385LP4 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] H385
XXXX
HMC385LP4E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H385
XXXX
[1] Max peak re ow temperature of 235 °C
[2] Max peak re ow 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. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST
BE SOLERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED
PCB LAND PATTERN
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
v02.0705
HMC385LP4 / 385LP4E
VCOS & PLOs - SMT
11
11 - 17
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
Pin Number Function Description Interface Schematic
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
22 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.
Pin Descriptions
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
v02.0705
HMC385LP4 / 385LP4E
VCOS & PLOs - SMT
11
11 - 18
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
The circuit board used in the nal application should
use RF circuit design techniques. Signal lines
should have 50 ohm impedance while the package
ground leads and exposed paddle should be con-
nected 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.
Evaluation PCB
List of Materials for Evaluation PCB 105706 [1]
Item Description
J1 - J2 PCB Mount SMA RF Connector
J3 - J4 DC Pin
C1 4.7 μF Tantalum Capacitor
C2 10,000 pF Capacitor, 0603 Pkg.
U1 HMC385LP4 / HMC385LP4E VCO
PCB [2] 105667 Eval Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
v02.0705
HMC385LP4 / 385LP4E
VCOS & PLOs - SMT
11
11 - 19
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
Notes:
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
v02.0705
HMC385LP4 / 385LP4E
