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For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
1
HMC635LC4
v01.0514
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
General Description
Features
Functional Diagram
The HMC635LC4 is a GaAs PHEMT MMIC Driver
Amplier die which operates between 18 and 40
GHz. The amplier provides 18.5 dB of gain, +27
dBm Output IP3, and +22 dBm of output power at 1
dB gain compression, while requiring 280 mA from a
+5V supply. Ideal as a driver amplier for microwave
radio applications, or as an LO driver for mixers
operating between 18 and 40 GHz, the HMC635LC4
is capable of providing up to +23.5 dBm of saturated
output power at 15% PAE. The amplier’s I/Os are DC
blocked and internally matched to 50 Ohms making it
ideal for integration into Multi-Chip-Modules (MCMs).
Gain: 18.5 dB [2]
P1dB: +22 dBm [2]
Output IP3: +27 dBm
Saturated Power: +23.5 dBm @ 15% PAE [2]
Supply Voltage: +5V @ 280 mA
50 Ohm Matched Input/Output
24 Lead Ceramic 4x4mm SMT Package: 16mm2
Electrical Specications
TA = +25° C, Vdd= Vdd1, 2, 3, 4 = +5V, Idd= Idd1 + Idd2 + Idd3 + Idd4 = 280mA [1]
Typical Applications
The HMC635LC4 is ideal for:
• Point-to-Point Radios
• Point-to-Multi-Point Radios & VSAT
• LO Driver for Mixers
• Military & Space
Parameter Min. Typ. Max. Min. Ty p. Max. Units
Frequency Range 18 - 36 36 - 40 GHz
Gain [2] 15 18.5 15 17.5 dB
Gain Variation Over Temperature 0.045 0.06 0.045 0.06 dB/ °C
Input Return Loss 13 7dB
Output Return Loss 10 7dB
Output Power for 1 dB Compression (P1dB) [2] 19 22 16 21 dBm
Saturated Output Power (Psat) [2] 23.5 21.5 dBm
Output Third Order Intercept (IP3) 22 27 21 26 dBm
Noise Figure [2] 7 7 dB
Total Supply Current (Idd1 + Idd2 + Idd3 + Idd4) 280 280 mA
[1] Adjust Vgg1 = Vgg2 between -2 to 0V to achieve Idd= 280 mA Typical.
[2] Board loss subtracted out for gain, power and noise gure measurements.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
2
HMC635LC4
v01.0514
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Input Return Loss vs. Temperature Output Return Loss vs. Temperature
Broadband Gain & Return Loss [1] Gain vs. Temperature [1]
P1dB vs. Temperature [1] Psat vs. Temperature [1]
-25
-15
-5
5
15
25
10 15 20 25 30 35 40 45 50
S21
S11
S22
RESPONSE (dB)
FREQUENCY (GHz)
-20
-15
-10
-5
0
16 21 26 31 36 41
+25C
- 40C
RETURN LOSS (dB)
FREQUENCY (GHz)
0
5
10
15
20
25
16 21 26 31 36 41
+25C
- 40C
GAIN (dB)
FREQUENCY (GHz)
16
18
20
22
24
26
16 21 26 31 36 41
+25C
- 40C
P1dB (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
16 21 26 31 36 41
+25C
- 40C
RETURN LOSS (dB)
FREQUENCY (GHz)
16
18
20
22
24
26
16 21 26 31 36 41
+25C
- 40C
Psat (dBm)
FREQUENCY (GHz)
[1] Board loss subtracted out for gain, power and noise gure measurements.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
3
HMC635LC4
v01.0514
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Power Compression @ 30 GHz [1]
Output IP3 vs. Temperature Noise Figure vs. Temperature [1]
Gain & Power vs.
Supply Voltage @ 30 GHz [1] Reverse Isolation vs. Temperature
Power Compression @ 40 GHz [1]
-70
-60
-50
-40
-30
-20
-10
0
16 21 26 31 36 41
+25C
- 40C
ISOLATION (dB)
FREQUENCY (GHz)
16
18
20
22
24
26
4.5 4.7 4.9 5.1 5.3 5.5
Gain
P1dB
Psat
GAIN (dB), P1dB (dBm), Psat (dBm)
Vdd (V)
16
20
24
28
32
36
40
16 21 26 31 36 41
+25 C
-40 C
IP3 (dBm)
FREQUENCY (GHz)
0
3
6
9
12
15
16 21 26 31 36 41
+25 C
-40 C
NOISE FIGURE (dB)
FREQUENCY (GHz)
0
5
10
15
20
25
30
-15 -10 -5 0 5 10
Pout (dBm)
Gain (dB)
PAE (%)
Pout (dBm), GAIN (dB), PAE (%)
INPUT POWER (dBm)
0
5
10
15
20
25
30
-15 -10 -5 0 5 10
Pout (dBm)
Gain (dB)
PAE (%)
Pout (dBm), GAIN (dB), PAE (%)
INPUT POWER (dBm)
[1] Board loss subtracted out for gain, power and noise gure measurements.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
4
HMC635LC4
v01.0514
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Absolute Maximum Ratings
Drain Bias Voltage (Vdd1, 2, 3, 4) +5.5V
Gate Bias Voltage (Vgg1, Vgg2) -3 to 0V
RF Input Power (RFIN)(Vdd = +5 Vdc) 15 dBm
Channel Temperature 175 °C
Continuous Pdiss (T= 70 °C)
(derate 15.1 mW/°C above 70 °C) 1.575 W
Thermal Resistance
(channel to package base) 66.4 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -55 to +70 °C
Vdd (V) Idd (mA)
4.5 277
5.0 280
5.5 286
Note: Amplier will operate over full voltage ranges shown above
Typical Supply Current vs. Vdd
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA
2. LEAD AND GROUND PADDLE PLATING: 30-80
MICROINCHES GOLD OVER 50 MICROINCHES MINIMUM NICKEL.
3. DIMENSIONS ARE IN INCHES [MILLIMETERS].
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm DATUM -C-
6. ALL GROUND LEADS AND GROUND PADDLE MUST
BE SOLDERED TO PCB RF GROUND.
Package Information
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC635LC4 Alumina, White Gold over Nickel MSL3 [1] H635
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
5
HMC635LC4
v01.0514
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Pin Descriptions
Pin Number Function Description Interface Schematic
1, 2, 4 - 8, 10,
12 - 15, 17 - 19, 24,
Ground Paddle
GND These pins and package bottom must be connected to
RF/DC ground
3RFIN This pad is AC coupled
and matched to 50 Ohms.
16 RFOUT This pad is AC coupled
and matched to 50 Ohms.
9, 11 Vgg1, Vgg2
Gate control for amplier, please follow “MMIC Amplier
Biasing Procedure” application note. See assembly diagram for
required external components.
20 - 23 Vdd4 - Vdd1 Power Supply Voltage for the amplier. See assembly
diagram for required external components.
Application Circuit
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, 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
AMPLIFIERS - DRIVER & GAIN BLOCK - SMT
6
HMC635LC4
v01.0514
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
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 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 board should be mounted to an
appropriate heat sink. The evaluation circuit board
shown is available from Hittite upon request.
List of Materials for Evaluation 122763 [1]
Item Description
J1 - J2 2.92 mm PC Mount K-Connector
VD1 - VD4,
VGG1, VGG2 DC Pin
C1 - C6 100 pF Capacitor, 0402 Pkg.
C7 - C12 1000 pF Capacitor, 0603 Pkg.
C13 - C18 4.7 µF Capacitor, Tantalum, Case A
U1 HMC635LC4 Driver Amplier
PCB [2] 122761 Evaluation PCB [3]
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350 or Arlon 25FR
[3] Due to the very high frequency operation of this product
a custom LC4 PCB footprint and solder stencil are required
for this design. Performance shown in this data sheet
was produced using this custom footprint. DO NOT USE
Hittite’s standard LC4 footprint. Please contact Applications
for details.
