1
Features
Frequency Range 2.4 GHz to 2.5 GHz
Linear P
out
18 dBm Typically
Gain 20 dB Typically
V
CC
from 2.7 V to 3.6 V
Package: HP-VFQFP-N16 (4
4 mm
2
)
Benefits
High Efficiency and Biasing Control Extends Battery Life Time
Reduction of Current Consumption by Power-down Mode
No External Components for Input Matching
Space Saving 4
4 mm
2
Package
Electrostatic sensitive device.
Observe precautions for handling.
Description
Process
The 2.4-GHz power amplifier is designed in Atmel's Silicon-Germanium (SiGe)
process and provides excellent noise performance, high gain as well as good power-
added efficiency.
Circuitry
The 802.11b/802.11g PA consists of a two-stage amplifier with a linear output power
of 18 dBm. The output stages were realized using an open-collector structure. The IC
features 50-
W
input matching. Power-up/down and biasing are controlled at the
Pin Vcontr. An integrated power detector provides a voltage proportional to the output
power.
Figure 1. Block Diagram
V
1_PA
PA
_
I
N
Input
Matching
n.c.
GND
V_DET_Out
Vcc
GND
Vctrl
Interstage
Matching
V2_P
A_Out
Standby/
biasing
control
13
Det.
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
V2
_PA_O
u
t
V2_P
A_Out
V
2_PA_O
u
t
Interstage
Matching
V
1_PA
SiGe PA
T7031
2.4-GHz SiGe
Power Amplifier
for 802.11b and
802.11g
WLAN Systems
T7031
Preliminary
Rev. 4564BWLAN02/03
2
T7031
4564BWLAN02/03
Pin Configuration
Figure 2. Pinning HP-VFQFP-N16
Vcc
GND
Vctrl
INT_MATCH
n.c.
GND
V_DET_Out
INT_MATCH
V
1
_PA
V
1
_PA
P
A
_I
N
IN
_
M
A
T
C
H
V2_PA
_
Out
V2_PA
_
Out
V2_PA
_
Out
V2_PA
_
Out
16 15 14 13
5 6 7 8
1
2
3
4
12
11
10
9
T7031
Gnd on the Paddel
Pin Description
Pin
Symbol
Function
1
Vcc
Supply voltage
2
GND
Ground
2
Vctrl
Power-up/biasing control voltage
4
INT_MATCH
Interstage matching
5
V2_PA_Out
Power amplifier output and supply voltage for 2nd power amplifier stage
6
V2_PA_Out
Power amplifier output and supply voltage for 2nd power amplifier stage
7
V2_PA_Out
Power amplifier output and supply voltage for 2nd power amplifier stage
8
V2_PA_Out
Power amplifier output and supply voltage for 2nd power amplifier stage
9
INT_MATCH
Interstage matching
10
V_DET_Out
Power detector output
11
GND
Ground
12
n.c.
Not connected
13
IN_MATCH
Input matching
14
PA_IN
Power amplifier input
15
V1_PA
Supply voltage for 1
st
power amplifier stage
16
V1_PA
Supply voltage for 1
st
power amplifier stage
Slug
Ground
3
T7031
4564BWLAN02/03
Absolute Maximum Ratings
Parameters
Symbol
Value
Unit
Supply voltage
V
CC
6
V
Supply current
I
CC
200
mA
Junction temperature
T
j
150
C
Storage temperature
T
Stg
-40 to +125
C
Input RF power
Pin
12
dBm
Control voltage power up/down and biasing
Vcontr
0 to 3
V
Thermal Resistance
Parameters
Symbol
Value
Unit
Junction ambient
R
thJA
35
K/W
Operating Range
Parameters
Symbol
Value
Unit
Supply voltage range
V
CC
2.7 to 3.6
V
Ambient temperature range
T
amb
-30 to +80
C
Electrical Characteristics
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
Supply voltage
V
CC
2.7
3.3
3.6
V
Frequency Range
f
2400
2500
MHz
P1dB output Power
P1dB
23
dBm
Saturated output
power
For reference
Psat
24
dBm
Linear power gain
Gl
20
dB
Current Consumption
P
out
= 18 dBm
I
CC
90
mA
Power-down mode
I
pd
15
A
Power added
efficiency
P
out
= 18 dBm
PAE
20
%
Adjacent channel
power rejection
P
out
= 18 dBm
(2)
First side lobe
Second side lobe
ACPR1
ACPR2
-33
-55
dBc
dBc
2nd harmonic
P1dB
2fout
-30
dBc
Input 50
W
VSWR
VSWRin
2:1
Output 50
W
VSWR
With external
matching
VSWRout
2:1
Reverse isolation
On and off mode
ISOr
35
dB
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes: 1. The current of the PA can be controlled by the Pin Vcontr. For lower output level demand, the current can be reduced.
2. With IEEE 802.11b conform modulation.
4
T7031
4564BWLAN02/03
Figure 3. Application Circuit
Control voltage range
PA operating mode
(Biasing)
(1)
Vcontr
1
2
V
Power down
Vcontr
0.2
V
Power Detector
Maximum power
PDETmax
22
dBm
Minimum power
PDETmin
2
dBm
Settling time
tset
0.5
s
Maximum voltage
VDETmax
2
V
Electrical Characteristics (Continued)
No.
Parameters
Test Conditions
Pin
Symbol
Min.
Typ.
Max.
Unit
Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes: 1. The current of the PA can be controlled by the Pin Vcontr. For lower output level demand, the current can be reduced.
2. With IEEE 802.11b conform modulation.
15
14
13
n.c.
11
10
1
2
3
4
Standby/
biasing
control
Det.
5
6
7
8
12
9
16
SiGe PA
T7031
Vcc
V1_PA
Vctrl
*
PA_Out
*
V2_PA
* microstrip Line
*
V_DET_Out
*
*
PA_IN
5
T7031
4564BWLAN02/03
Package Information
Ordering Information
Extended Type Number
Package
Remarks
MOQ
T7031M-PEP
HP-VFQFP-N16
Taped and reeled
1500
T7031M-PEQ
HP-VFQFP-N16
Taped and reeled
6000
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