DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 58
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
HMC635
GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
v00.1107
General Description
Features
Functional Diagram
The HMC635 is a GaAs PHEMT MMIC Driver
Ampli er die which operates between 18 and 40 GHz.
The ampli er provides 19.5 dB of gain, +29 dBm
Output IP3, and +23 dBm of output power at 1 dB
gain compression, while requiring 280 mA from a +5V
supply. Ideal as a driver ampli er for microwave radio
applications, or as an LO driver for mixers operating
between 18 and 40 GHz, the HMC635 is capable of
providing up to +24 dBm of saturated output power at
15% PAE. The ampli er’s I/Os are DC blocked and
internally matched to 50 Ohms making it ideal for
integration into Multi-Chip-Modules (MCMs). All data
is taken with die connected at input and output RF
ports via two 1 mil wedge bonds of 500μm length.
Gain: 19.5 dB
P1dB: +23 dBm
Output IP3: +29 dBm
Saturated Power: +24 dBm @ 15% PAE
Supply Voltage: +5V @ 280 mA
50 Ohm Matched Input/Output
Die Size: 1.95 x 0.84 x 0.10 mm
Electrical Speci cations, TA = +25° C, Vdd1, 2, 3, 4 = +5V, Idd= 280mA [1]
Typical Applications
The HMC635 is ideal for:
• Point-to-Point Radios
• Point-to-Multi-Point Radios & VSAT
• LO Driver for Mixers
• Military & Space
Parameter Min. Typ. Max. Min. Typ. Max. Units
Frequency Range 18 - 36 36 - 40 GHz
Gain 16 19.5 16 19 dB
Gain Variation Over Temperature 0.045 0.060 0.045 0.050 dB/ °C
Input Return Loss 15 9 dB
Output Return Loss 13 12 dB
Output Power for 1 dB Compression (P1dB) 19 23 14 19 dBm
Saturated Output Power (Psat) 24 20 dBm
Output Third Order Intercept (IP3) 24 29 21 27 dBm
Noise Figure 87dB
Supply Current (Idd1 + Idd2 + Idd3 + Idd4) 280 280 mA
[1]Adjust Vgg1 = Vgg2 between -2 to 0V to achieve Idd= 280 mA Typical.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 59
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
Input Return Loss vs. Temperature Output Return Loss vs. Temperature
Broadband Gain & Return Loss Gain vs. Temperature
P1dB vs. Temperature Psat vs. Temperature
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
-25
-20
-15
-10
-5
0
5
10
15
20
25
10 15 20 25 30 35 40 45 50
S11
S21
S22
RESPONSE (dB)
FREQUENCY (GHz)
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
RETURN LOSS (dB)
FREQUENCY (GHz)
16
17
18
19
20
21
22
23
24
25
26
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
P1dB (dBm)
FREQUENCY (GHz)
16
17
18
19
20
21
22
23
24
25
26
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
Psat (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
RETURN LOSS (dB)
FREQUENCY (GHz)
0
4
8
12
16
20
24
28
32
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
GAIN (dB)
FREQUENCY (GHz)
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 60
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
Power Compression @ 30 GHz
Output IP3 vs. Temperature Noise Figure vs. Temperature
Gain & Power vs. Supply Voltage @ 30 GHz Reverse Isolation vs. Temperature
Power Compression @ 40 GHz
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
0
3
6
9
12
15
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
NOISE FIGURE (dB)
FREQUENCY (GHz)
16
20
24
28
32
36
40
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
IP3 (dBm)
FREQUENCY (GHz)
-70
-60
-50
-40
-30
-20
-10
0
16 18 20 22 24 26 28 30 32 34 36 38 40 42
+25 C
+85 C
-55 C
ISOLATION (dB)
FREQUENCY (GHz)
16
18
20
22
24
26
4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4 5.5
Gain
P1dB
Psat
GAIN (dB), P1dB (dBm), Psat (dBm)
Vdd (V)
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)
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 61
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
Drain Bias Voltage
(Vdd1, Vdd2, Vdd3, Vdd4) +5.5 Vdc
Gate Bias Voltage (Vgg1,Vgg2) -3 to 0 Vdc
RF Input Power (RFIN)(Vdd = +5 Vdc) 15 dBm
Channel Temperature 175 °C
Continuous Pdiss (T= 85 °C)
(derate 16.16 mW/°C above 85 °C) 1.45 W
Thermal Resistance
(channel to die bottom) 61.87 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -55 to +85 °C
Vdd (V) Idd (mA)
4.5 277
5.0 280
5.5 286
Note: Ampli er will operate over full voltage ranges shown above
Typical Supply Current vs. Vdd
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 62
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
Outline Drawing
NOTES:
1. ALL DIMENSIONS ARE IN INCHES [MM]
2. DIE THICKNESS IS .004”
3. TYPICAL BOND IS .004” SQUARE
4. BACKSIDE METALLIZATION: GOLD
5. BOND PAD METALLIZATION: GOLD
6. BACKSIDE METAL IS GROUND.
7. CONNECTION NOT REQUIRED FOR UNLABELED BOND PADS.
Die Packaging Information [1]
Standard Alternate
GP-2 (Gel Pack) [2]
[1] Refer to the “Packaging Information” section for die
packaging dimensions.
[2] For alternate packaging information contact Hittite
Microwave Corporation.
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 63
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
Pad Descriptions
Pad Number Function Description Interface Schematic
1RFIN This pad is AC coupled
and matched to 50 Ohms.
2, 3, 4, 5 Vdd1, Vdd2, Vdd3,
Vdd4
Power Supply Voltage for the ampli er. See assembly
diagram for required external components.
6RFOUT This pad is AC coupled
and matched to 50 Ohms.
7, 8 Vg g2 , Vg g1
Gate control for ampli er, please follow “MMIC Ampli er
Biasing Procedure” application note. See assembly dia-
gram for required external components.
Die Bottom GND Die bottom must be connected to RF/DC ground.
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 64
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
Assembly Diagram
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
DRIVER & GAIN BLOCK AMPLIFIERS - CHIP
2
2 - 65
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
Mounting & Bonding Techniques for Millimeterwave GaAs MMICs
The die should be attached directly to the ground plane eutectically or with
conductive epoxy (see HMC general Handling, Mounting, Bonding Note).
50 Ohm Microstrip transmission lines on 0.127mm (5 mil) thick alumina
thin  lm substrates are recommended for bringing RF to and from the chip
(Figure 1). If 0.254mm (10 mil) thick alumina thin  lm substrates must be
used, the die should be raised 0.150mm (6 mils) so that the surface of
the die is coplanar with the surface of the substrate. One way to accom-
plish this is to attach the 0.102mm (4 mil) thick die to a 0.150mm (6 mil)
thick molybdenum heat spreader (moly-tab) which is then attached to the
ground plane (Figure 2).
Microstrip substrates should brought as close to the die as possible in
order to minimize bond wire length. Typical die-to-substrate spacing is
0.076mm to 0.152 mm (3 to 6 mils).
Handling Precautions
Follow these precautions to avoid permanent damage.
Storage: All bare die are placed in either Waffle or Gel based ESD protec-
tive containers, and then sealed in an ESD protective bag for shipment.
Once the sealed ESD protective bag has been opened, all die should be
stored in a dry nitrogen environment.
Cleanliness: Handle the chips in a clean environment. DO NOT attempt
to clean the chip using liquid cleaning systems.
Static Sensitivity: Follow ESD precautions to protect against ESD
strikes.
Transients: Suppress instrument and bias supply transients while bias
is applied. Use shielded signal and bias cables to minimize inductive
pick-up.
General Handling: Handle the chip along the edges with a vacuum collet or with a sharp pair of bent tweezers. The
surface of the chip has fragile air bridges and should not be touched with vacuum collet, tweezers, or  ngers.
Mounting
The chip is back-metallized and can be die mounted with AuSn eutectic preforms or with electrically conductive epoxy.
The mounting surface should be clean and  at.
Eutectic Die Attach: A 80/20 gold tin preform is recommended with a work surface temperature of 255 °C and a tool
temperature of 265 °C. When hot 90/10 nitrogen/hydrogen gas is applied, tool tip temperature should be 290 °C. DO
NOT expose the chip to a temperature greater than 320 °C for more than 20 seconds. No more than 3 seconds of
scrubbing should be required for attachment.
Epoxy Die Attach: Apply a minimum amount of epoxy to the mounting surface so that a thin epoxy  llet is observed
around the perimeter of the chip once it is placed into position. Cure epoxy per the manufacturer’s schedule.
Wire Bonding
Ball or wedge bond with 0.025mm (1 mil) diameter pure gold wire. Thermosonic wirebonding with a nominal stage
temperature of 150 °C and a ball bonding force of 40 to 50 grams or wedge bonding force of 18 to 22 grams is recom-
mended. Use the minimum level of ultrasonic energy to achieve reliable wirebonds. Wirebonds should be started on
the chip and terminated on the package or substrate. All bonds should be as short as possible <0.31mm (12 mils).
0.102mm (0.004”) Thick GaAs MMIC
Ribbon Bond
0.076mm
(0.003”)
RF Ground Plane
0.127mm (0.005”) Thick Alumina
Thin Film Substrate
Figure 1.
0.102mm (0.004”) Thick GaAs MMIC
Ribbon Bond
0.076mm
(0.003”)
RF Ground Plane
0.150mm (0.005”) Thick
Moly Tab
0.254mm (0.010” Thick Alumina
Thin Film Substrate
Figure 2.
HMC635
v00.1107 GaAs PHEMT MMIC DRIVER
AMPLIFIER, 18 - 40 GHz
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D
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