Switched Low Noise Amplifier
800 - 1000 MHz
Features
•
•
•
•
•
High Gain State:
-Gain: 16 dB, Noise Figure: 1.6 dB
-Input IP3: +3 dBm (@2.7V, 25 mA)
Low Gain State:
-Insertion Loss: 5 dB, Input IP3: +24 dBm
Single Supply: +2.7 to +5 VDC
Low Cost MSOP-8 Plastic Package
Adjustable current: 10 to 30 mA with external
resistor
AM55-0016
V3
Functional Block Diagram
Description
M/A-COM’s AM55-0016 is a high dynamic range,
switchable low noise amplifier in a low cost, MSOP
8-lead, surface mount, plastic package. The design
utilizes a patented switching technique to provide a
low insertion loss, high input IP
3
bypass state in
parallel with the high gain, low noise state.
The LNA employs external input matching to obtain
optimum noise figure performance and operating
frequency flexibility. The AM55-0016 also features
flexible biasing to control the current consumption
vs. dynamic range trade-off. It’s current can be
controlled over a range of 10 mA to 30 mA with an
external resistor.
Typical applications include receiver front ends in
cellular band CDMA handsets. It is also useful as a
switched gain block, buffer or driver in portable
cellular systems.
The AM55-0016 is fabricated using a low-cost 0.5-
micron gate length GaAs MESFET process. The
process features full passivation for increased
performance and reliability.
Pin Configuration
Pin No.
1
2
3
4
5
6
7
8
Pin Name
VDD1
IN
VS1
GND
VS2
OUT
VDD2
VCTL
Description
Stage 1 Supply Voltage
RF Input
Stage 1 Source
RF and DC Ground
Stage 2 Source
RF Output
Stage 2 Supply Voltage
Switch Control Voltage
Absolute Maximum Ratings
2,3,4
Parameter
V
DD
Input Power
Current
Absolute Maximum
+6 VDC
0 dBm
30 mA
+150°C
-40°C to +85°C
-65°C to +150°C
Ordering Information
Part Number
AM55-0016
AM55-0016TR
AM55-0016SMB
1.
1
Package
MSOP-8 Lead Plastic Package
Forward Tape and Reel
Sample Test Board
2.
3.
4.
Channel Temperature
4
Operating Temperature
Storage Temperature
Reference Application Note M513 for reel size information.
Exceeding any one or combination of these limits may cause
permanent damage to this device.
M/A-COM does not recommend sustained operation near
these survivability limits.
Typical thermal resistance (ө
jc
) = +99°C/W.
1
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Switched Low Noise Amplifier
800 - 1000 MHz
AM55-0016
V3
Electrical Specifications:
T
A
= 25°C, Z
0
= 50
Ω,
F = 881 MHz, P
IN
= -30 dBm, V
DD
= 2.7 V, I
DD
= 10 mA
Parameter
Test Conditions
Units
Min.
Typ.
Max.
HIGH GAIN STATE, Voltage control = 2.7 volts
Gain
Noise Figure
Input IP3
Input VSWR / Output VSWR
Reverse Isolation
LOW GAIN STATE, Voltage control = 0 volts
Insertion Loss
Input IP3
Input VSWR
Output VSWR
1
DD
= 100 µA
dB
dBm
—
—
—
—
—
—
5
+24
2.3:1
2.0:1
—
—
—
—
I
DD
= 10 mA, V
DD
= 2.7 V
I
DD
= 25 mA, V
DD
= 2.7 V
dB
dB
dBm
dBm
—
dB
—
—
—
—
—
—
16
1.6
-2
+3
2.0:1
32
—
—
1.8
—
—
Handling Procedures
Please observe the following precautions to avoid
damage.
Evaluation Board
Static Sensitivity
Gallium Arsenide Integrated Circuits are sensitive
to electrostatic discharge (ESD) and can be
damaged by static electricity. Proper ESD control
techniques should be used when handling these
devices.
Evaluation PCB + RF Connector Losses
Port Reference
RF IN
RF OUT
Approximate RF Loss
0.15 dB @ 900 MHz
0.15 dB @ 900 MHz
The DC connector on the Designer’s Kit PCB
allows convenient DC line access.
This is
accomplished by one or more of the following
methods:
1. A mating female multi-pin connector (Newark
Electronics Stock # 46F-4658, not included).
2. Wires soldered to the necessary pins (not
included).
3. Clip leads (not included).
2
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Switched Low Noise Amplifier
800 - 1000 MHz
Recommended PCB Configuration
Cross Section View
AM55-0016
V3
The PCB dielectric between RF traces and RF
ground layers should be chosen to reduce RF
discontinues between 50
Ω
lines and package pins.
M/A-COM recommends an FR-4 dielectric
thickness of 0.008” (0.2 mm) yielding a 50
Ω
line
width of 0.015” (0.38 mm). The recommended
metallization thickness is 1 ounce copper.
External Circuitry Parts List
5
Part
C1, C2
C3, C4
Value
1000 pF
47 pF
10 nF
22 nH
See note 6
UMH9N
Purpose
Source Bypass
By-Pass
By-Pass
Tuning
Source Bias Resistor
Dual Bipolar Transistor
External Circuitry
C5, C6, C7
L1
RBIAS
U1
5.
6.
All external circuitry parts are readily available, low cost
surface mount components (0.040 inches x 0.020 inches or
0.060 inches x 0.030 inches).
RBIAS is chosen to set the desired current,
For:
I
DD
~10 mA, R1 = 75 ohms;
I
DD
~20 mA, R1 = 25 ohms;
I
DD
~30 mA, R1 = 9 ohms.
Designer’s Kit AM55-0016SMB
The AM55-0016SMB Designer’s Kit allows for
immediate evaluation of M/A-COM’s AM55-0016.
The Designer’s Kit includes an AM55-0016, an
evaluation board and a floppy disk containing
typical performance data and a DXF file of the
recommended PCB layout. The evaluation board
consists of the recommended external surface
mount circuitry, RF connectors and a DC multi-pin
connector, all mounted to a multi-layer FR-4 PCB.
The AM55-0016SMB evaluation PCB is illustrated
below with all functional ports labeled.
3
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Switched Low Noise Amplifier
800 - 1000 MHz
Typical Performance Curves
High Gain Mode: Gain vs. Current
19
18
17
16
15
14
13
12
800
10mA
20mA
30mA
AM55-0016
V3
High Gain Mode: Noise Figure vs. Current
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
800
10mA
20mA
30mA
850
900
950
1000
Frequency (MHz)
850
900
950
1000
Frequency (MHz)
High Gain Mode: Input IP3 vs. Current
7
6
5
4
3
2
1
0
-1
-2
-3
800
850
900
950
1000
10mA
15 mA
20mA
25mA
High Gain Mode: IIP3 vs. Current and Voltage
10
8
6
4
2
0
-2
10
12
14
16
18
20
22
24
26
28
30
2.7
3.2
3.6
4.0
V
V
V
V
Frequency (MHz)
Current (mA)
Low Gain Mode: Insertion Loss and Input IP3
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
-5.5
-6.0
-6.5
-7.0
800
850
900
950
IL (dB)
IIP3 (dBm)
30
29
28
27
26
25
24
23
22
21
20
1000
High Gain: Gain and Output Power vs. Input Power
18
17
16
15
14
13
12
11
10
-26
-24
-22
-20
-18
-16
-14
-12
-10
Output Power (dBm)
Gain (dB)
6
4
2
0
-2
-4
-6
-8
-10
Input Power (dBm)
Frequency (MHz)
4
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
Switched Low Noise Amplifier
800 - 1000 MHz
Typical Performance Curves (continued)
Input Return Loss
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
800
Low Gain
High Gain
850
900
950
1000
AM55-0016
V3
Output Return Loss
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
800
850
900
950
1000
Low Gain
High Gain
Frequency (MHz)
Frequency (MHz)
High Gain Mode: Gain vs. Temperature
19
18
17
16
15
14
13
12
800
-30°C
+25°C
+80°C
High Gain Mode: Noise Figure vs. Temperature
2.4
2.2
2
1.8
1.6
1.4
1.2
1
800
-30°C
+25°C
+80°C
850
900
950
1000
850
900
950
1000
Frequency (MHz)
Frequency (MHz)
Low Gain Mode: Insertion Loss vs. Temperature
-4.0
-4.2
-4.4
-4.6
-4.8
-5.0
-5.2
-5.4
-5.6
-5.8
-6.0
800
-30°C
+25°C
+80°C
850
900
950
1000
Frequency (MHz)
5
M/A-COM Inc. and its affiliates reserve the right to make changes to the
product(s) or information contained herein without notice. M/A-COM makes
no warranty, representation or guarantee regarding the suitability of its
products for any particular purpose, nor does M/A-COM assume any liability
whatsoever arising out of the use or application of any product(s) or
information.
•
North America
Tel: 800.366.2266 / Fax: 978.366.2266
•
Europe
Tel: 44.1908.574.200 / Fax: 44.1908.574.300
•
Asia/Pacific
Tel: 81.44.844.8296 / Fax: 81.44.844.8298
Visit www.macom.com for additional data sheets and product information.
