MICROWAVE CORPORATION
8 - 260
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
AMPLIFIERS - SMT
8
HMC491LP3
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
v00.0503
General Description
Features
Functional Diagram
The HMC491LP3 is a versatile, integrated, Low
Noise Amplifi er (LNA) featuring a bypass mode
intended for 3.4 to 3.8 GHz Fixed Wireless &
WLL applications. The amplifi er provides 16 dB
of gain, 2 dB noise fi 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 consumption to 20 A. A
low cost, leadless 3x3 mm QFN surface mount
package (LP3) houses the amplifi er. No external
RF matching components are required.
Gain: 16 dB
Noise Figure: 2.0 dB
Single Supply: +3.0 V @ 9 mA
Integrated Bypass Mode
50 Ohm Matched Input/Output
3 x 3 x 1 mm QFN SMT Package
Electrical Specifi cations,
T
A
= +25 C, Vdd = +3V
Typical Applications
The HMC491LP3 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
MHz
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)
1
3
11
dBm
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.
MICROWAVE CORPORATION
8 - 261
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
AMPLIFIERS - SMT
8
HMC491LP3
v00.0503
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
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
11
12
13
14
15
16
17
18
19
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
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
NOI
SE FI
GURE (dB)
FREQUENCY (GHz)
-40
-35
-30
-25
-20
-15
-10
-5
0
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
ISOLATION (dB)
FREQUENCY (GHz)
MICROWAVE CORPORATION
8 - 262
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
AMPLIFIERS - SMT
8
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
HMC491LP3
v00.0503
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
0
1
2
3
4
5
6
7
8
9
10
11
12
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
OUTPUT P1dB (dBm)
FREQUENCY (GHz)
0
1
2
3
4
5
6
7
8
9
10
11
12
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
Psat (dBm)
FREQUENCY (GHz)
-4
-3
-2
-1
0
1
2
3
4
5
6
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
IIP3 (dBm)
FREQUENCY (GHz)
10
12
14
16
18
20
22
0
1
2
3
4
5
6
7
8
9
10
11
12
2.7
3
3.3
Gain
Noise Figure
Idd
GAIN (dB)
NOISE FIGURE (dB), Idd (mA)
Vdd (Vdc)
MICROWAVE CORPORATION
8 - 263
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
AMPLIFIERS - SMT
8
Bypass Mode
Insertion Loss vs. Temperature
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
Bypass Mode
Broadband Insertion Loss & Return Loss
HMC491LP3
v00.0503
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
0
2
4
6
8
10
12
14
16
18
20
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
IIP3 (dBm)
FREQUENCY (GHz)
20
21
22
23
24
25
26
27
28
29
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)
-5
-4.5
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
3.4
3.5
3.6
3.7
3.8
+25 C
+85 C
-40 C
INSERTION 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)
-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)
MICROWAVE CORPORATION
8 - 264
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
AMPLIFIERS - SMT
8
HMC491LP3
v00.0503
GaAs MMIC LOW NOISE AMPLIFIER
w/ BYPASS MODE, 3.4 - 3.8 GHz
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
Outline Drawing
NOTES:
1. MATERIAL PACKAGE BODY: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY
3. LEAD AND GROUND PADDLE PLATING: Sn/Pb SOLDER
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
6. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
7. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
8. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
LNA Mode
Vctl= Vdd @ 1.6 mA
Bypass Mode
Vctl= 0Vdc @ -13 A
Vdd= +3V 10%
Truth Table
PDF 
ZIP