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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
LOW NOISE AMPLIFIERS - SMT
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8 - 126
HMC491LP3 / 491LP3E
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v03.1206
General Description
Features
Functional Diagram
The HMC491LP3 & HMC491LP3E are versatile, inte-
grated, Low Noise Ampli ers (LNA) featuring a bypass
mode intended for 3.4 to 3.8 GHz Fixed Wireless &
WLL applications. The ampli er provides 16 dB of
gain, 2 dB noise gure and +3 dBm input IP3 while
requiring only 9 mA from a +3V supply. Using a single
control line, the LNA can be switched into a low loss
2.2 dB bypass mode reducing the current consump-
tion to 20 μA. A low cost, leadless 3x3 mm QFN sur-
face mount package (LP3) houses the ampli er. No
external RF matching components are required.
Gain: 16 dB
Noise Figure: 2 dB
Single Supply: +3V @ 9 mA
Integrated Bypass Mode
50 Ohm Matched Input/Output
3 x 3 x 1 mm QFN SMT Package
Electrical Speci cations, TA = +25° C, Vdd = +3V
Typical Applications
The HMC491LP3 / HMC491LP3E is ideal for:
• Wireless Local Loop (WLL)
• Fixed Wireless Access
• Microwave & VSAT Radios
Parameter LNA Mode LNA Mode Bypass Mode Units
Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
Frequency Range 3.4 - 3.6 3.6 - 3.8 3.4 - 3.8 GHz
Gain 14.5 17 13 15.5 -2.8 -2.3 dB
Gain Variation Over Temperature 0.012 0.02 0.012 0.02 0.004 0.008 dB / °C
Noise Figure 2.2 2.7 2.0 2.5 -- -- dB
Input Return Loss 12 17 18 dB
Output Return Loss 9 7 11 dB
Reverse Isolation 34 33 -- dB
Input or Output Power for 1dB Compression (P1dB)* 3 6 4 7 25 28 dBm
Input Third Order Intercept (IP3)
(-20 dBm Input Power per tone, 1 MHz tone spacing) 1311dBm
Supply Current (Idd) 9 9 0.03 mA
* P1dB for LNA Mode is referenced to RFOUT while P1dB for Bypass Mode is referenced to RFIN.
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
LOW NOISE AMPLIFIERS - SMT
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LNA Mode
Broadband Gain & Return Loss
LNA Mode
Gain vs. Temperature
LNA Mode
Input Return Loss vs. Temperature
LNA Mode
Output Return Loss vs. Temperature
LNA Mode
Noise Figure vs. Temperature
LNA Mode
Reverse Isolation vs. Temperature
-25
-20
-15
-10
-5
0
5
10
15
20
2.8 3 3.2 3.4 3.6 3.8 4
S21
S11
S22
RESPONSE (dB)
FREQUENCY (GHz)
10
12
14
16
18
20
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
GAIN (dB)
FREQUENCY (GHz)
-20
-15
-10
-5
0
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
RETURN LOSS (dB)
FREQUENCY (GHz)
-15
-12
-9
-6
-3
0
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
RETURN LOSS (dB)
FREQUENCY (GHz)
0
1
2
3
4
5
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
NOISE FIGURE (dB)
FREQUENCY (GHz)
-40
-30
-20
-10
0
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
ISOLATION (dB)
FREQUENCY (GHz)
HMC491LP3 / 491LP3E
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v03.1206
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
LOW NOISE AMPLIFIERS - SMT
8
8 - 128
Bypass Mode
Insertion Loss vs. Temperature
Bypass Mode
Broadband Insertion Loss & Return Loss
-5
-4
-3
-2
-1
0
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
INSERTION LOSS (dB)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
2.8 3 3.2 3.4 3.6 3.8 4
S21
S11
S22
RESPONSE (dB)
FREQUENCY (GHz)
LNA Mode
Output P1dB vs. Temperature
LNA Mode
Psat vs. Temperature
LNA Mode
Input IP3 vs. Temperature
LNA Mode Gain, Noise Figure & Supply
Current vs. Supply Voltage @ 3.6 GHz
0
2
4
6
8
10
12
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
OUTPUT P1dB (dBm)
FREQUENCY (GHz)
0
2
4
6
8
10
12
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
Psat (dBm)
FREQUENCY (GHz)
-4
-2
0
2
4
6
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
IP3 (dBm)
FREQUENCY (GHz)
10
14
18
22
0
2
4
6
8
10
12
2.7 2.8 2.9 3 3.1 3.2 3.3
Gain
Noise Figure
Idd
GAIN (dB)
NOISE FIGURE (dB), Idd (mA)
Vdd (Vdc)
HMC491LP3 / 491LP3E
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v03.1206
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
LOW NOISE AMPLIFIERS - SMT
8
8 - 129
Bypass Mode
Input Return Loss vs. Temperature
Bypass Mode
Output Return Loss vs. Temperature
Bypass Mode
Input IP3 vs. Temperature
Bypass Mode
Input P1dB vs. Temperature
0
4
8
12
16
20
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
IP3 (dBm)
FREQUENCY (GHz)
20
22
24
26
28
30
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
INPUT P1dB (dBm)
FREQUENCY (GHz)
-25
-20
-15
-10
-5
0
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
RETURN LOSS (dB)
FREQUENCY (GHz)
-15
-12
-9
-6
-3
0
3.4 3.5 3.6 3.7 3.8
+25 C
+85 C
-40 C
RETURN LOSS (dB)
FREQUENCY (GHz)
HMC491LP3 / 491LP3E
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v03.1206
Typical Supply Current vs. Vdd
Vdd (Vdc) Idd (mA)
+2.7 7.6
+3.0 9.0
+3.3 10.2
Drain Bias Voltage (Vdd) +7.0 Vdc
RF Input Power (RFIN)
(Vdd = +3.0 Vdc)
LNA Mode
Bypass Mode
0 dBm
+30 dBm
Channel Temperature 150 °C
Continuous Pdiss (T = 85 °C)
(derate 1.8 mW/°C above 85 °C) 0.117 W
Thermal Resistance
(channel to ground paddle) 556 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
Absolute Maximum Ratings
LNA Mode Vctl= Vdd @ 1.6 mA
Bypass Mode Vctl= 0Vdc @ -13 µA
Vdd= +3V ±10%
Truth Table
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
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
LOW NOISE AMPLIFIERS - SMT
8
8 - 130
Pin Number Function Description Interface Schematic
1, 5 - 8, 12, 13 N/C No connection necessary.
These pins may be connected to RF/DC ground.
2, 4, 9, 11, 15 GND These pins must be connected to RF/DC ground.
3 RF IN This pin is AC coupled and matched to 50 Ohms.
10 RF OUT This pin is AC coupled and matched to 50 Ohms.
14 Vdd Power supply voltage.
16 Vctl Control voltage. Vctl= Vdd for LNA mode.
Vctl= 0V for bypass mode.
Pin Descriptions
Outline Drawing
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.
HMC491LP3 / 491LP3E
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v03.1206
Part Number Package Body Material Lead Finish MSL Rating Package Marking [3]
HMC491LP3 Low Stress Injection Molded Plastic Sn/Pb Solder MSL1 [1] 491
XXXX
HMC491LP3E RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] 491
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
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
LOW NOISE AMPLIFIERS - SMT
8
8 - 131
HMC491LP3 / 491LP3E
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v03.1206
Item Description
J1 - J2 PCB Mount SMA RF Connector
J3 - J6 DC Pin
U1 HMC491LP3 / HMC491LP3E Ampli er
PCB [2] 107431 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
Evaluation PCB
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.
List of Materials for Evaluation PCB 107174 [1]
