Features
•
•
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Frequency Range 2.4 GHz to 2.5 GHz
Supply Voltage 2.7 V to 3.6 V
21 dBm Linear Output Power for IEEE 802.11b Mode
3.5% EVM at 15.5 dBm Output Power for IEEE 802.11g Mode
On-chip Power Detector with 20 dB Dynamic Range
Power-down Mode and Biasing Control
No External Components for Input Matching
Low Profile Plastic Package QFN16 (4
×
4
×
0.9 mm)
Benefits
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IEEE 802.11b WLAN
IEEE 802.11g OFDM WLAN
PC Cards, PCMCIA
2.4 GHz ISM Band Application
Electrostatic sensitive device.
Observe precautions for handling.
2.4-GHz SiGe
Power Amplifier
for 802.11b/g
WLAN Systems
T7031
Preliminary
Description
Circuitry
The PA’s is designed for low current-consumption 802.11b and 802.11g multi-mode
applications such as Mini-PCI and PCMCIA for portable devices. The low profile
plastic package with internal input matching to 50
Ω
minimizes the PCB board-space
and allows simplified integration with very few passive components. The on-chip
power-detector provides a voltage linear to the output power while the standby/bias
control logic provides power saving and shutdown as well as a linear adjustment of
output power. The PA is realized as a two stage PA with internal interstage-matching
and an open-collector output structure.
Process
The power amplifier is designed in Atmel's Silicon-Germanium (SiGe) process and
provides excellent linearity and noise performance, high gain as well as good power-
added efficiency.
Rev. 4564F–WLAN–07/04
Figure 1.
Block Diagram
V_DET_OUT
10
Det.
12
13
GND
11
NC
9
SiGe PA
T7031
8
7
6
V2_PA_OUT
V2_PA_OUT
V2_PA_OUT
V2_PA_OUT
14
15
Standby/
biasing
control
5
16
1
VCC
2
GND
3
VCTRL
4
INT_MATCH
2
T7031 [Preliminary]
4564F–WLAN–07/04
T7031 [Preliminary]
Pin Configuration
Figure 2.
Pinning QFN16
V1_PA
V1_PA
PA_IN
IN_MATCH
VCC
GND
VCTRL
INT_MATCH
1
2
3
4
16 15 14 13
12 NC
T7031
11 GND
10 V_DET_OUT
GND on the Paddel
9 INT_MATCH
5 6 7 8
V2_PA_Out
V2_PA_Out
V2_PA_Out
V2_PA_Out
Pin Description
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Slug
Symbol
VCC
GND
VCTRL
INT_MATCH
V2_PA_Out
V2_PA_Out
V2_PA_Out
V2_PA_Out
INT_MATCH
V_DET_OUT
GND
NC
IN_MATCH
PA_IN
V1_PA
V1_PA
–
Function
Supply voltage
Ground
Power-up/biasing control voltage
Interstage matching (must not be connected)
Power amplifier output and supply voltage for 2
nd
power amplifier stage
Power amplifier output and supply voltage for 2
nd
power amplifier stage
Power amplifier output and supply voltage for 2
nd
power amplifier stage
Power amplifier output and supply voltage for 2
nd
power amplifier stage
Interstage matching (must not be connected)
Power detector output
Ground
Not connected
Input matching (must not be connected)
Power amplifier input
Supply voltage for 1
st
power amplifier stage
Supply voltage for 1
st
power amplifier stage
Ground
3
4564F–WLAN–07/04
Absolute Maximum Ratings
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Parameters
Supply voltage, no RF voltage applied
Supply current
Junction temperature
Storage temperature
Input RF power
Control voltage power up/down and biasing
Note:
Symbol
V
CC
I
CC
T
j
T
Stg
P
IN
V
CTRL
Value
6
200
150
-40 to +125
12
0 to 3
Unit
V
mA
°
C
°
C
dBm
V
The part may not survive all maximums applied simultaneously.
Thermal Resistance
Parameters
Junction ambient
Symbol
R
thJA
Value
45
Unit
K/W
Operating Range
Parameters
Supply voltage range
Ambient temperature range
Symbol
V
CC
T
amb
Value
2.7 to 3.6
-30 to +80
Unit
V
°C
Electrical Characteristics
No.
1.0
1.1
1.2
1.3
1.4
1.5
Parameters
Supply voltage
Frequency Range
Control voltage range
Current Consumption
PA operating mode
Power-down Mode
Quiescent
Power-down mode
Test Conditions
Pin
Symbol
V
CC
f
V
CTRL
V
CTRL
I
CQ
I
PD
75
10
Min.
2.7
2400
1
Typ.
3.3
Max.
3.6
2500
2
0.2
Unit
V
MHz
V
V
mA
µA
Type*
A
A
A
A
A
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
4
T7031 [Preliminary]
4564F–WLAN–07/04
T7031 [Preliminary]
Electrical Characteristics - Unmodulated Carrier
Test conditions (unless otherwise stated): V
CC
= 3.3 V, Frequency = 2.45 GHz, T
amb
= 25°C
No.
2.0
2.1
2.2
2.3
2.4
2.5
Parameters
Saturated output
power
P1dB output Power
2
nd
harmonic
rejection
Small signal gain
Reverse isolation
Input 50
Ω
VSWR
Output 50
Ω
VSWR
P
OUT
= 18 dBm, with
external matching
I
CQ
, small signal
condition
I
CQ
, small signal
condition
I
CQ
, small signal
condition
I
CQ
, small signal
condition, with
external matching
Test Conditions
For reference
Pin
Symbol
P
SAT
P1dB
2f
OUT
GL
ISOr
VSWRin
Min.
Typ.
24
23
30
22
40
2:1
Max.
Unit
dBm
dBm
dB
dB
dB
Type*
A
A
A
A
A
C
2.6
VSWRout
2:1
C
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Electrical Characteristics - 11 Mbps CCK Modulation
Test conditions (unless otherwise stated): V
CC
= 3.3 V, Frequency = 2.45 GHz, T
amb
= 25° C, IEEE 802.11b conform 11 Mbps CCK
modulation with gaussian transmit filtering
No.
3.0
Parameters
Maximum linear
output power
Linear power gain
Test Conditions
ACPR1
≥
33 dBc
ACPR2
≥
55 dBc
P
OUT
= P
LIN
ACPR1
≥
33 dBc
ACPR2
≥
55 dBc
P
OUT
= P
LIN
ACPR1
≥
33 dBc
ACPR2
≥
55 dBc
Pin
Symbol
P
LIN
GL
Min.
Typ.
21
Max.
Unit
dBm
Type*
A
3.1
22
dB
A
3.2
Current Consumption
I
CC
130
mA
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Electrical Characteristics - 54 Mbps OFDM Modulation
Test conditions (unless otherwise stated): V
CC
= 3.3 V, Frequency = 2.45 GHz, T
amb
= 25° C, IEEE 802.11g conform 54 Mbps OFDM
modulation, 0.7% EVM measurement equipment noise floor included in EVM measurement result.
No.
4.0
4.1
4.2
Parameters
Error vector
magnitude
Linear power gain
Current consumption
Test Conditions
P
OUT
= 15.5 dBm
P
OUT
= 15.5 dBm
P
OUT
= 15.5 dBm
Pin
Symbol
EVM
GL
I
CC
Min.
Typ.
3.5
22
85
Max.
Unit
%
dB
mA
Type*
C
A
A
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
5
4564F–WLAN–07/04
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