250 mW Power Amplifier with T/R and Diversity Switches
AM55-0003
Specifications Subject to Change Without Notice
V 2.0
M/A-COM Inc.
s
1011 Pawtucket Boulevard, Lowell, MA 01853 USA
s
Telephone: 800-366-2266
2
Control Line
Operating
ANT
T/R
Mode
CTRL
CTRL
X
1
Receive
X
0
Transmit
0
X
ANT 1
1
X
ANT 2
Truth Table
Pin No.
Pin Name
Description
1
ANT CTRL
Antenna selection: Select ANT 1
(0V) or ANT 2 (+5 V)
2
ANT COMMON
Common Port of Diversity Switch
3
GND
DC and RF Ground
4
ANT 1
Output #1 of Diversity Switch
5
GND
DC and RF Ground
6
ANT 2
Output #2 of Diversity Switch
7
GND
DC and RF Ground
8
RX OUT
Output of T/R Switch for receive mode
9V
G2
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 M
Ω
10
GND
DC and RF Ground
11
V
DD1
Positive bias for the first stage of the
PA, 2.7 to 6 volts
12
GND
DC and RF Ground
13
GND
DC and RF Ground
14
V
G1
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 M
Ω
15
RF IN
RF Input of the Power Amplifier
16
GND
DC and RF Ground
17
V
G3
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 M
Ω
18
V
DD2
Positive bias for the second stage of
the PA, 2.7 to 6 volts
19
GND
DC and RF Ground
20
GND
DC and RF Ground
21
GND
DC and RF Ground
22
GND
DC and RF Ground
23
V
DD3
Positive bias for the third stage of the
PA, 2.7 to 6 volts
24
GND
DC and RF Ground
25
RF OUT
RF output of T/R switch and power
amplifier for transmit mode
26
T/R CTRL
0 V for transmit mode, +5 V for
receive mode
27
V
DD TR
V
DD for T/R switch
28
V
DD ANT
V
DD for Diversity Switch
Pin Configuration
Functional Diagram and Pin Configuration
Absolute Maximum Ratings
1
Parameter
Absolute Maximum
Max. Input Power
2
+23 dBm
Operating Voltages
2,3
V
DD = 8 V
V
GG = -8 V
Operating Temperature
-40°C to +85°C
Storage Temperature
-65°C to +150°C
1. Exceeding these limits may cause permanent damage.
2. Ambient temperature (T
A) = +25°C
3. |V
DD| + |VGG| not to exceed 12 volts.
X - Don’t Care
“0” = 0 V to 0.2 V @ 100 µA
“1” = V
DD to VDD - 0.2 V @ 200 µA
ANT CTRL
ANT COMMON
GND
ANT 1
GND
ANT 2
GND
RX OUT
V
G2
GND
V
DD1
GND
GND
V
G1
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
1
14
28
15