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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
VARIABLE GAIN AMPLIFIER - SMT
1
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
Functional Diagram
The HMC997LC4 is a GaAs MMIC PHEMT analog
variable gain amplier and/or driver amplier which
operates between 17 and 27 GHz. Ideal for microwave
radio applications, the amplier provides up to 20.5
dB of gain, output P1dB of up to +24 dBm, and up to
+31 dBm of output IP3 at maximum gain, while
requiring only 170 mA from a +5V supply. A gain
control voltage (Vctrl) is provided to allow variable
gain control up to 15 dB. Gain atness is excellent
making the HMC997LC4 ideal for EW, ECM and radar
applications. The HMC997LC4 is housed in a RoHS
compliant 4 x 4 mm ceramic QFN leadless package
and is compatible with high volume surface mount
manufacturing.
Typical Applications Features
General Description
The HMC997LC4 is ideal for:
• Point-to-Point Radio
• Point-to-Multi-Point Radio
• EW & ECM Subsystems
• Ka-Band Radar
• Test Equipment
Wide Gain Control Range: 15 dB
Single Control Voltage
Output IP3 @ Max Gain: +31 dBm
Output P1dB: +24 dBm
No External Matching
24 Lead 4 x 4 mm SMT Package: 16 mm2
Electrical Specications, TA = +25 °C, Vdd1, 2, 3 = 5V, Vctrl = -4.5V, Idd = 170 mA*
Parameter Min. Ty p . Max. Min. Ty p . Max. Units
Frequency Range 17 - 21 21 - 27 GHz
Gain 1 7. 0 20 16 19 dB
Gain Flatness ±0.3 ±0.7 dB
Gain Variation Over Temperature 0.02 0.02 dB/ °C
Gain Control Range 12 15 12 14 dB
Noise Figure 4.0 3.5 dB
Input Return Loss 13 12 dB
Output Return Loss 17 19 dB
Output Power for 1 dB Compression (P1dB) 21 24 21 24 dBm
Saturated Output Power (Psat) 25 24.5 dBm
Output Third Order Intercept (IP3) 31 30 dBm
Total Supply Current (Idd) 170 170 mA
*Set Vctrl = -4.5V and then adjust Vgg1, 2 between -2V to 0V to achieve Idd = 170 mA typical.
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
VARIABLE GAIN AMPLIFIER - SMT
2
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
Output Return Loss vs. Temperature
Broadband Gain & Return Loss Gain vs. Temperature
Input Return Loss vs. Temperature
Gain vs. Control Voltage Range Gain vs. Control Voltage
0
5
10
15
20
25
17 19 21 23 25 27
GAIN (dB)
FREQUENCY (GHz)
Vctl = -4.5V
Vctl = -1.9V
Vctl = -3.4V
Vctl = -2,5V
Vctl = -3.1V
Vctl = -1.0V
Vctl = -2.8V
Vctl = -2.2V
Vctl = -1.6V
10
14
18
22
26
30
17 19 21 23 25 27
+25C
+85C
-40C
GAIN (dB)
FREQUENCY (GHz)
-30
-25
-20
-15
-10
-5
0
17 19 21 23 25 27
+25C
+85C
-40C
RETURN LOSS (dB)
FREQUENCY (GHz)
-30
-25
-20
-15
-10
-5
0
17 19 21 23 25 27
+25C
+85C
-40C
RETURN LOSS (dB)
FREQUENCY (GHz)
-30
-20
-10
0
10
20
30
15 17 19 21 23 25 27 29
S21
S11
S22
RESPONSE (dB)
FREQUENCY (GHz)
0
5
10
15
20
25
-4 -3.7 -3.4 -3.1 -2.8 -2.5 -2.2 -1.9 -1.6 -1.3 -1
17 GHz
19 GHz
21 GHz
22 GHz
25 GHz
27 GHz
GAIN (dB)
CONTROL VOLTAGE (V)
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
VARIABLE GAIN AMPLIFIER - SMT
3
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
[1] Tested with broadband bias tee on RF ports and C1 = 10,000 pF
[2] C1, C6 and C8 = 100 pF, L1 = 24 nF
P1dB vs. Temperature Psat vs. Temperature
Noise Figure vs. Temperature
Input Return Loss @
Control Voltage Extreme
Output Return Loss @
Control Voltage Extreme
Noise Figure vs. Control Voltage
-30
-25
-20
-15
-10
-5
0
17 19 21 23 25 27
-4.5 Volts
-1.0 Volts
RETURN LOSS (dB)
FREQUENCY (GHz)
-30
-25
-20
-15
-10
-5
0
17 19 21 23 25 27
-4.5 Volts
-1.0 Volts
RETURN LOSS (dB)
FREQUENCY (GHz)
0
1
2
3
4
5
6
7
17 18 19 20 21 22 23 24 25 26 27
+25C
+85C
-40C
NOISE FIGURE (dB)
FREQUENCY (GHz)
2
4
6
8
10
12
14
-4 -3.5 -3 -2.5 -2 -1.5 -1
17 GHz
18 GHz
20 GHz
22 GHz
24 GHz
25 GHz
26 GHz
NOISE FIGURE (dB)
CONTROL VOLTAGE (V)
0
5
10
15
20
25
30
17 19 21 23 25 27
+25C
+85C
-40C
P1dB (dBm)
FREQUENCY (GHz)
Vctrl = -4.5V
Vctrl = -1V
0
5
10
15
20
25
30
17 19 21 23 25 27
+25C
+85C
-40C
Psat (dBm)
FREQUENCY (GHz)
Vctrl = -4.5V
Vctrl = -1V
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
VARIABLE GAIN AMPLIFIER - SMT
4
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
Output IP3 vs. TemperatureReverse Isolation vs. Temperature
IP3 and Gain @ 22 GHz Pin = -20 dBmIP3 and Gain @ 18 GHz Pin = -20 dBm
IP3 and Gain @ 26 GHz Pin = -20 dBm
-80
-70
-60
-50
-40
-30
-20
-10
0
16 18 20 22 24 26 28
+25C
+85C
-40C
ISOLATION (dB)
FREQUENCY (GHz)
10
15
20
25
30
35
40
17 18 19 20 21 22 23 24 25 26 27
+25C
+85C
-40C
FREQUENCY (GHz)
IP3 (dBm)
Vctrl=-4.5V, Pout=+14dBm
Vctrl=-1V, Pout=+14dBm
0
5
10
15
20
25
30
35
40
-4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1
OIP3
GAIN
IIP3
IP3 (dBm), GAIN (dB)
CONTROL VOLTAGE (V)
0
5
10
15
20
25
30
35
40
-4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1
OIP3
GAIN
IIP3
IP3 (dBm), GAIN (dB)
CONTROL VOLTAGE (V)
0
5
10
15
20
25
30
35
40
-4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1
OIP3
GAIN
IIP3
IP3 (dBm), GAIN (dB)
CONTROL VOLTAGE (V)
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
VARIABLE GAIN AMPLIFIER - SMT
5
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
Outline Drawing
Part Number Package Body Material Lead Finish MSL Rating Package Marking [2]
HMC997LC4 Alumina, White Gold over Nickel MSL3 [1] H997
XXXX
[1] Max peak reow temperature of 260 °C
[2] 4-Digit lot number XXXX
Package Information
Absolute Maximum Ratings
Drain Bias Voltage (Vdd1, 2, 3) +5.5V
Gate Bias Voltage (Vgg1, 2) -3 to 0V
Gain Control Voltage (Vctrl) -5 to 0V
RF Power Input (RFIN) +5 dBm
Channel Temperature 175 °C
Continuous Pdiss (T = 85 °C)
(derate 10.2 mW/°C above 85 °C) [1] 0.92 W
Thermal Resistance
(Channel to ground paddle) 97.6 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 0 Passed 100V
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Bias Voltage
Vdd1,2,3 (V) Idd Total (mA)
+5V 170
Vgg1,2 (V) Igg Total (mA)
0V to -2V <0.1 mA
NOTES:
1. PACKAGE BODY MATERIAL: ALUMINA.
2. LEAD AND GROUND PADDLE PLATING: GOLD FLASH OVER NICKEL.
3. DIMENSIONS ARE IN INCHES (MILLIMETERS).
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
5. PACKAGE WARP SHALL NOT EXCEED 0.05 MM DATUM – C –
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO
PCB RF GROUND.
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
VARIABLE GAIN AMPLIFIER - SMT
6
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
Pin Descriptions
Pin Number Function Description Interface Schematic
1, 2, 6, 8, 10,
11, 13, 17, 18,
20, 21, 23
N/C
The pins are not connected internally: however all data
shown herein was measured with these pins connected
to RF/DC ground externally
3, 5, 14, 16 GND These pins and the exposed ground paddle
must be connected to RF/DC ground.
4RFIN This pad is AC coupled
and matched to 50 Ohm.
7, 12 Vgg1, 2
Gate control for amplier. Adjust voltage to achieve typical
Idd. Please follow “MMIC Amplier Biasing Procedure”
application note.
9Vctrl Gain control Voltage for the amplier. See assembly
diagram for required external components.
15 RFOUT This pad is AC coupled
and matched to 50 Ohm.
19, 22, 24 Vdd3, 2, 1 Drain Bias Voltage for the amplier. See assembly diagram
for required external components
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
VARIABLE GAIN AMPLIFIER - SMT
7
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 GHz
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
VARIABLE GAIN AMPLIFIER - SMT
8
HMC997LC4
v02.0514
VARIABLE GAIN AMPLIFIER
17 - 27 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 connected
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.
Item Description
J1, J4 PCB Mount SMA RF Connectors
J5 - J10 DC Pin
C1 - C6 100 pF Capacitor, 0402 Pkg.
C7 - C12 1000 pF Capacitor, 0603 Pkg.
C13 - C18 2.2 µF Capacitor, CASE A
U1 HMC997LC4 Variable Gain Amplier
PCB [2] 122172 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25 FR
List of Materials for Evaluation PCB
EVAL01-HMC997LC4 [1]
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Analog Devices Inc.:
HMC997LC4 HMC997LC4TR HMC997LC4TR-R5 EVAL01-HMC997LC4