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For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
FREQUENCY DIVIDERS & DETECTORS - SMT
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General Description
Features
Functional Diagram
The HMC494LP3 & HMC494LP3E are low noise
Divide-by-8 Static Dividers utilizing InGaP GaAs
HBT technology packaged in leadless 3x3 mm QFN
surface mount plastic packages. This device operates
from DC (with a square wave input) to 18 GHz input
frequency from a single +5V DC supply. The low
additive SSB phase noise of -150 dBc/Hz at 100 kHz
offset helps the user maintain excellent system noise
performance.
Ultra Low SSB Phase Noise: -150 dBc/Hz
Very Wide Bandwidth
Output Power: -4 dBm
Single DC Supply: +5V
16 Lead 3x3mm QFN Package: 9 mm
Typical Applications
Prescaler for DC to 18 GHz PLL Applications:
• Point-to-Point / Multi-Point Radios
• VSAT Radios
• Fiber Optic
• Test Equipment
• Military
Electrical Specications, TA = +25° C, 50 Ohm System, Vcc= +5V
Parameter Conditions Min. Typ. Max. Units
Maximum Input Frequency 18 19 GHz
Minimum Input Frequency Sine Wave Input. [1] 0.2 0.5 GHz
Input Power Range Fin = 2 to 12 GHz -20 -15 +10 dBm
Fin = 12 to 16 GHz -20 -15 +3 dBm
Fin = 16 to 18 GHz -15 -10 0dBm
Output Power Fin = 0.5 to 18 GHz -7 -4 dBm
Reverse Leakage Both RF Outputs Terminated 55 dB
SSB Phase Noise (100 kHz offset) Pin = 0 dBm, Fin = 6 GHz -150 dBc/Hz
Output Transition Time Pin = 0 dBm, Fout = 882 MHz 100 ps
Supply Current (Icc1 + Icc2) 103 mA
HMC494LP3 / 494LP3E
SMT GaAs HBT MMIC
DIVIDE-BY-8, DC - 18 GHz
v05.1211
1. Divider will operate down to DC for square-wave input signal
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
FREQUENCY DIVIDERS & DETECTORS - SMT
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FREQUENCY DIVIDERS & DETECTORS - SMT
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SSB Phase Noise Performance,
Pin= 0 dBm, T= 25 °C
Input Sensitivity Window, T= 25 °C Input Sensitivity Window vs. Temperature
Output Power vs. Temperature
Reverse Leakage, Pin= 0 dBm, T= 25 °C
Output Harmonic Content,
Pin= 0 dBm, T= 25 °C
-30
-20
-10
0
10
20
0 2 4 6 8 10 12 14 16 18 20
INPUT POWER (dBm)
INPUT FREQUENCY (GHz)
Recommended
Operating Window
-30
-20
-10
0
10
20
0 2 4 6 8 10 12 14 16 18 20
Min Pin +25C
Max Pin +25C
Min Pin +85C
Max Pin +85C
Min Pin -40C
Max Pin -40C
INPUT POWER (dBm)
INPUT FREQUENCY (GHz)
-10
-8
-6
-4
-2
0
0 4 8 12 16 20
+25C
+85C
-40C
OUTPUT POWER (dBm)
INPUT FREQUENCY (GHz)
-160
-140
-120
-100
-80
-60
-40
-20
0
102103104105106107
SSB PHASE NOISE (dBc/Hz)
OFFSET FREQUENCY (Hz)
-50
-40
-30
-20
-10
0
0 2 4 6 8 10 12 14 16 18 20
Pfeedthru
2nd Harmonic
3rd Harmonic
OUTPUT LEVEL (dBm)
INPUT FREQUENCY (GHz)
-80
-60
-40
-20
0
0 4 8 12 16 20
Both Output Ports Terminated
One Output Port Terminated
OUTPUT LEVEL (dBm)
INPUT FREQUENCY (GHz)
HMC494LP3 / 494LP3E
SMT GaAs HBT MMIC
DIVIDE-BY-8, DC - 18 GHz
v05.1211
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
FREQUENCY DIVIDERS & DETECTORS - SMT
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FREQUENCY DIVIDERS & DETECTORS - SMT
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Output Voltage Waveform,
Pin= 0 dBm, Fout= 882 MHz, T= 25 °C Absolute Maximum Ratings
Outline Drawing
Typical Supply Current vs. Vcc
Note: Divider will operate over full voltage range shown above
RF Input (Vcc = +5V) +13 d B m
Supply Voltage (Vcc1, Vcc2) +5.5V
Channel Temperature (Tc) 135 °C
Continuous Pdiss (T = 85 °C)
(derate 11.9 mW/° C above 85 °C) 593 mW
Thermal Resistance (RTH)
(junction to ground paddle) 84 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1A
Vcc1, Vcc2 (V) Icc (mA)
4.75 90
5.0 103
5.25 115
-500
-300
-100
100
300
500
22.7 23.1 23.5 23.9 24.3 24.7
AMPLITUDE (mV)
TIME (nS)
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
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
SOLDERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED
LAND PATTERN.
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC494LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 494
XXXX
HMC494LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 494
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
HMC494LP3 / 494LP3E
SMT GaAs HBT MMIC
DIVIDE-BY-8, DC - 18 GHz
v05.1211
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
FREQUENCY DIVIDERS & DETECTORS - SMT
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Pin Number Function Description Interface Schematic
1, 4-9,
12, 13, 16 N/C No connection.
2IN RF Input must be DC blocked.
3IN RF Input 180° out of phase with pin 2 for differential operation.
AC ground for single ended operation.
10 OUT Divided Output.
11 OUT Divided output 180° out of phase with pin 10.
14, 15 Vcc1, Vcc2 Supply voltage 5V ± 0.25V. Connect both pins to +5V supply.
GND Ground: Backside of package has exposed metal ground slug which
must be connected to RF/DC ground.
Pin Description
HMC494LP3 / 494LP3E
SMT GaAs HBT MMIC
DIVIDE-BY-8, DC - 18 GHz
v05.1211
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
FREQUENCY DIVIDERS & DETECTORS - SMT
4
FREQUENCY DIVIDERS & DETECTORS - SMT
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Evaluation PCB
The circuit board used in the application should use
RF circuit design techniques. Signal lines should
have 50 Ohm impedance while the package ground
leads and backside ground slug 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. This evaluation board is
designed for single ended input testing. J2 and J3
provide differential output signals.
Item Description
J1 - J3 PCB Mount SMA RF Connector
J4, J5 DC Pin
C2 - C5 100 pF Capacitor, 0402 Pkg.
C6 1000 pF Capacitor, 0603 Pkg.
C1 2.2 uF Tantalum Capacitor
U1 HMC494LP3 / HMC494LP3E Divide-by-2
PCB [2] 107197 Eval Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
List of Materials for Evaluation PCB 107384 [1]
HMC494LP3 / 494LP3E
SMT GaAs HBT MMIC
DIVIDE-BY-8, DC - 18 GHz
v05.1211
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
FREQUENCY DIVIDERS & DETECTORS - SMT
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FREQUENCY DIVIDERS & DETECTORS - SMT
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Application Circuit
HMC494LP3 / 494LP3E
SMT GaAs HBT MMIC
DIVIDE-BY-8, DC - 18 GHz
v05.1211
