Preliminary Specifications
250 mW Power Amplifier with T/R and Diversity Switches
2.4 - 2.5 GHz
AM55-0003
Features
q
SSOP-28
+.0025
.0275 -.0025
0,7
+0,06
-0,06
+.0034
.1540 -.0043 .236
±.008
+0,09 5,99
±0,2
3,91 -0,11
+.0037
.3900 -.0041
9,91 +0,09
-0,1
q
q
q
q
Highly Integrated Power Amplifier With T/R and
Diversity Switches
Operates Over 2.7 V to 6 V Supply Voltage
High Linear Output Power (P
1dB
: +24 dBm)
Individual Gate Control for Each Amplifier Stage
Low Cost SSOP-28 Plastic Package
PIN 1
Description
M/A-COM’s AM55-0003 is a GaAs power amplifier with
integrated transmit/receive and an antenna diversity switch
in a low cost SSOP 28 plastic package. The power
amplifier delivers +24 dBm of linear power with high
efficiency and can be operated with voltages as low as 2.7
volts. The power amplifier switch is fully monolithic. The
T/R and diversity switches achieve good insertion loss and
isolation without degrading the overall linearity. The
switches can be controlled with CMOS logic levels.
The AM55-0003 is ideally suited for QPSK, BPSK or other
linearly modulated systems in the 2.4 GHz ISM frequency
band. It can also be used in GFSK systems where levels of
+25 dBm are required. Typical applications include WLAN
and wireless portable data collection. This power amplifier
can be combined with a transceiver IC (MD58-0001 or
MD58-0002) to form a complete RF front end.
M/A-COM's AM55-0003 is fabricated using a mature
0.5-micron gate length GaAs process. The process features
full passivation for increased performance and reliability.
.057
±.003
1,45
±0,08
.015 (0,38) X 45°
+.0018
.0080 -.0005
0,2 +0,05
-0,01
0-8°
+.022
.028 -.013
+0,56
0,71 -0,33
.007
±.003
0,18
±0,08
.025
0,64
+.004
.010 -.001
0,25 +0,1
-0,03
.004 (0,10)
Dimensions are inches over millimeters
Ordering Information
Part Number
AM55-0003
AM55-0003TR
AM55-0003RTR
AM55-0003SMB
Description
SSOP 28-Lead Plastic Package
Forward Tape & Reel
*
Reverse Tape & Reel
*
Designer’s Kit
*
If specific reel size is required, consult factory for part number
assignment.
Typical Electrical Specifications
Test Conditions: Frequency: 2.45 GHz, V
DD 1,2, 3
= 5 V±5%, V
G1
adjusted for 20 mA quiescent bias on V
DD1
, V
G 2
adjusted for 70 mA quiescent bias on V
DD2
, V
G3
adjusted for 90 mA quiescent bias on V
DD3
, T
A
= +25°C
Parameter
Power Amplifier
Linear Gain
VSWR In/Out
Output Power @ P
1dB
Second Harmonic @ P
1dB
Third Harmonic @ P
1dB
I
DD
@ P
1dB
(V
DD1
+ V
DD2
+ V
DD3
)
T/R and Diversity Switches
Insertion Loss
Isolation
VSWR In/Out
Specifications Subject to Change Without Notice
Units
dB
dBm
dBc
dBc
mA
dB
dB
Min.
24
22.5
Typ.
28
1.75:1
24.5
-20
-30
270
1.2
Max.
32
0
-10
375
10
12
1.5:1
V 2.0
s
M/A-COM Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266
1
250 mW Power Amplifier with T/R and Diversity Switches
Pin Configuration
Pin No.
1
2
3
4
5
6
7
8
9
AM55-0003
1
Absolute Maximum Ratings
Description
Antenna selection: Select ANT 1
(0V) or ANT 2 (+5 V)
Common Port of Diversity Switch
DC and RF Ground
Output #1 of Diversity Switch
DC and RF Ground
Output #2 of Diversity Switch
DC and RF Ground
Output of T/R Switch for receive mode
Negative bias control for the second
PA stage, adjusted to set V
DD2
quiescent bias current, which is
typically 70 mA. Typical voltage
at pin = -0.55 V
Input impedance: > 1 MΩ
DC and RF Ground
Positive bias for the first stage of the
PA, 2.7 to 6 volts
DC and RF Ground
DC and RF Ground
Negative bias control for the first PA
stage, adjusted to set V
DD1
quiescent
bias current, which is typically 20 mA.
Typical voltage at pin = -0.75 V
Input impedance: > 1 MΩ
RF Input of the Power Amplifier
DC and RF Ground
Negative bias control for the third PA
stage, adjusted to set V
DD3
quiescent
bias current, which is typically 90 mA.
Typical voltage at pin = -0.95 V
Input impedance: > 1 MΩ
Positive bias for the second stage of
the PA, 2.7 to 6 volts
DC and RF Ground
DC and RF Ground
DC and RF Ground
DC and RF Ground
Positive bias for the third stage of the
PA, 2.7 to 6 volts
DC and RF Ground
RF output of T/R switch and power
amplifier for transmit mode
0 V for transmit mode, +5 V for
receive mode
V
DD
for T/R switch
V
DD
for Diversity Switch
ANT CTRL
ANT COMMON
GND
ANT 1
GND
ANT 2
GND
RX OUT
V
G2
GND
V
DD1
GND
GND
V
G1
Pin Name
ANT CTRL
ANT COMMON
GND
ANT 1
GND
ANT 2
GND
RX OUT
V
G2
Parameter
Max. Input Power
2
Operating Voltages
2,3
Operating Temperature
Storage Temperature
Absolute Maximum
+23 dBm
V
DD
= 8 V
V
GG
= -8 V
-40°C to +85°C
-65°C to +150°C
1. Exceeding these limits may cause permanent damage.
2. Ambient temperature (T
A
) = +25°C
3. |V
DD
| + |V
GG
| not to exceed 12 volts.
Truth Table
Control Line
ANT
T/R
CTRL
CTRL
X
1
X
0
0
X
1
X
X - Don’t Care
“0” = 0 V to 0.2 V @ 100 µA
“1” = V
DD
to V
DD
- 0.2 V @ 200 µA
Operating
Mode
Receive
Transmit
ANT 1
ANT 2
10
11
12
13
14
GND
V
DD1
GND
GND
V
G1
Functional Diagram and Pin Configuration
1
28
V
DD
ANT
V
DD
TR
T/R CTRL
RF OUT
GND
V
DD3
GND
GND
GND
GND
V
DD2
V
G3
GND
RF IN
15
16
17
RF IN
GND
V
G3
18
19
20
21
22
23
24
25
26
27
28
V
DD2
GND
GND
GND
GND
V
DD3
GND
RF OUT
T/R CTRL
V
DD
TR
V
DD
ANT
14
15
Specifications Subject to Change Without Notice
V 2.0
s
M/A-COM Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266
2
250 mW Power Amplifier with T/R and Diversity Switches
AM55-0003
Power Amplifier Small Signal
Performance
1
Power Amplifier CW Performance at
Various Supply Voltages
1
LINEAR GAIN, V
DD1
= V
DD2
= V
DD3
35
POWER OUTPUT @ 2.45 GHz, V
DD1
= V
DD2
= V
DD3
30
25
6V
30
6V
5V
GAIN (dB)
25
20
15
10
2.0
2.2
4V
3V
POWER (dBm)
5V
20
4V
15
10
5
3V
2.4
2.6
2.8
3.0
-19
-14
-9
-4
1
FREQUENCY (GHz)
POWER INPUT (dBm)
INPUT MATCH
-5
50
-10
POWER ADDED EFFICIENCY (%)
@ 2.45 GHz, V
DD1
= V
DD2
= V
DD3
5V
6V
RETURN LOSS (dB)
-15
-20
-25
6V
5V
EFFICIENCY (%)
40
30
20
4V
10
0
-19
-14
-9
-4
3V
3V
-30
2.0
2.2
2.4
2.6
4V
2.8
3.0
1
FREQUENCY (GHz)
INPUT POWER (dBm)
OUTPUT MATCH
0
0
GAIN COMPRESSION @ 2.45 GHz, V
DD1
= V
DD2
= V
DD3
COMPRESSION (dBm)
RETURN LOSS (dB)
-1
-5
3V
-2
-3
-4
-5
-6
-7
-19
-14
-9
-4
1
6V
-10
4V
5V
6V
5V
3V
-15
4V
-20
2.0
2.2
2.4
2.6
2.8
3.0
FREQUENCY (GHz)
INPUT POWER (dBm)
1. All data measured at T
A
= +25°C and V
G1
, V
G2
and V
G3
adjusted for first stage quiescent current of 20 mA, second stage current of 70 mA
and third stage current of 90 mA, respectively.
Specifications Subject to Change Without Notice
V 2.0
s
M/A-COM Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266
3
250 mW Power Amplifier with T/R and Diversity Switches
Power Amplifier Temperature
Performance
1
LINEAR GAIN, V
DD1
= V
DD2
= V
DD 3
= +5 V
35
50
AM55-0003
Power Amplifier Spurious Response at
Various Supply Voltages
1
THIRD ORDER INTERMODULATION RATIO@ 2.45 GHz,
(TONE SPACING 600 kHz)
6V
+25°C
40
-20°C
30
GAIN (dB)
25
20
IMR (dBc)
5V
30
+70°C
15
20
3V
4V
10
10
2.0
2.2
2.4
2.6
2.8
3.0
9
13
17
21
25
FREQUENCY (GHz)
FUNDAMENTAL P
OUT
/ TONE (dBm)
POWER OUTPUT @ 2.45 GHz,
V
DD1
= V
DD2
= V
DD 3
= +5 V
30
25
70
65
SECOND HARMONIC RATIO @ 2.45 GHz,
V
DD1
= V
DD2
= V
DD3
POWER (dBm)
-20°C
dBc
3V
5V
6V
60
55
50
45
20
15
+70°C
10
+25°C
5
0
-19
-14
-9
-4
1
40
35
15
17
4V
19
21
23
25
INPUT POWER (GHz)
FUNDAMENTAL P
OUT
(dBm)
0
GAIN COMPRESSION @ 2.45 GHz,
V
DD1
= V
DD2
= V
DD3
= +5 V
+70°C
THIRD HARMONIC RATIO @ 2.45 GHz,
V
DD1
= V
DD2
= V
DD 3
60
COMPRESSION (dB)
6V
55
-1
-20°C
+25°C
-3
-4
-5
-20
-15
-10
-5
0
5
5V
50
dBc
45
40
-2
4V
35
15
17
19
21
23
3V
25
INPUT POWER (dBm)
FUNDAMENTAL P
OUT
(dBm)
1. All data measured at T
A
= +25°C and V
G1
, V
G2
and V
G3
adjusted for first stage quiescent current of 20 mA, second stage current of 70 mA and
third stage current of 90 mA, respectively.
Specifications Subject to Change Without Notice
V 2.0
s
M/A-COM Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266
4
250 mW Power Amplifier with T/R and Diversity Switches
Transmit/Receive Switch Performance
1
T/R INSERTION LOSS/ISOLATION
(RECEIVE MODE)
0
-5
-10
-15
-20
-25
-30
2.0
2.2
2.4
2.6
2.8
3.0
0
AM55-0003
Diversity Switch Performance
1
DIVERSITY SWITCH INSERTION
LOSS/ISOLATION
-5
-7
-9
-11
-13
-15
3.0
INSERTION LOSS (dB)
ISOLATION (dB)
-2
-3
-4
-5
-2
-3
-4
-5
2.0
2.2
2.4
2.6
2.8
FREQUENCY (GHz)
FREQUENCY (GHz)
T/R SWITCH MATCH (RECEIVE MODE)
0
0
DIVERSITY SWITCH MATCH
RETURN LOSS (dB)
RETURN LOSS (dB)
-5
-10
-5
INPUT
-10
INPUT
-15
-20
-15
OUTPUT
-20
2.0
2.2
2.4
2.6
2.8
3.0
OUTPUT
-25
2.0
2.2
2.4
2.6
2.8
3.0
FREQUENCY (GHz)
FREQUENCY (GHz)
HARMONIC LEAKAGE AT ANT 1/ANT 2 @ 2.45 GHz
2
-20
-30
-40
-50
-60
LEAKAGE (dBm)
THIRD HARMONIC
SECOND HARMONIC
-70
-80
10
-7
-4
-1
2
FUNDAMENTAL INPUT POWER (dBm)
1. All data measured with V
DD
TR = V
DD
ANT = +5 V, T
A
= +25°C.
2. Measured at 2.45 GHz at RF IN. Output measured at ANT 1 or ANT 2, with RF OUT and ANT COMMON terminated in 50
Ω.
Specifications Subject to Change Without Notice
V2.0
s
M/A-COM Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
Telephone: 800-366-2266
5
ISOLATION (dB)
-1
INSERTION LOSS (dB)
-1
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