1
Features
•Frequency Range 4.9 GHz to 5.4 GHz
•Linear POUT Typica ll y 18 dB m
•Gain Typically 17 dB
•VCC 3.1 V to 3.5 V
•Package : QFN 16
Benefits
•Biasing Control Extends Battery Life Time
•AC Input and Output Coupling Saves External Capacitors
•Output Matching Requires Only One External Inductor
•Very Suitable for PCMCIA Cards Type 1 (Thickness 3.3 mm)
Electr ostati c sen si ti ve device.
Observe precautions for handling.
Description
Process
The 5- GHz power a mplifier is designed in Atmel ’s Silicon-G er ma nium ( SiGe) pro cess
and provides excellent noise performance as well as good power-added efficiency.
Circuitry
The PA consists of a 2-stage am plifier with a line ar output power of 18 dBm. The
output stage was realized using an open-collector structure. The IC features 50-W
input matc hing. Power-up/down and outpu t level are controll ed at bias control Pin 6
(Vctl).
Figure 1. Block Diagram
Matching
Bias control
RFin
3 RFout
11
6
Vctl 16
Vcc_ctl
Vcc1
15 Vcc2
13
ATR3515
5-GHz WLAN
P ower Amplifier
fo r 80 2.11a
ATR3515
Preliminary
Rev. 4514E–WIRE–02/03
2ATR3515 4514E–WIRE–02/03
Pin Configuration
Figure 2. Pi nning QFN 16
GND
n.c.
RFin
GND
GND
RFout
n.c.
GND
Vcc_ctl
Vcc1
GND
Vcc2
GND
Vctl
GND
GND
16 15 14 13
5 6 7 8
1
2
3
4
12
11
10
9
ATR3515
GND on the Paddel
Pin Description
Pin Symbol Function
1 GND Ground
2 n.c. Not connected
3RFinRF input
4 GND Ground
5 GND Ground
6 Vctl Power-up/biasing control voltage
7 GND Ground
8 GND Ground
9 GND Ground
10 n.c. Not connected
11 RFout RF output
12 GND Ground
13 Vcc2 Supply voltage for PA stage
14 GND Ground
15 Vcc1 Supply voltage for driver stage
16 Vcc_ctl Supply voltage for biasing control
Paddel – Ground
3
ATR3515
4514E–WIRE–02/03
Electrical Characteristics
VCC = 3.3 V, Tamb = 25°C, unless otherwise specified
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Frequency range f 4900 5400 MHz
Ambient tem per a ture r ang e Tamb -25 75 °C
Supply voltage VCC 3.1 3.3 3.5 V
Linear output power Single tone signal Plin 18 dBm
P1dB outp ut power Single tone signal P1dB 23 dBm
Control voltage range PA operating mode Vctl 1.5 1.9 V
Power down Vctl 0.2 V
Turn on/off time `ON' is the time that ICC returns to
normal and `OFF' is the time the
current needs to decrease to 10% of
normal mode.
ton/off 500 600 ns
Input and output return loss With extern al matching -12 -8 dB
Spectrum mask (1) at ±11 MHz offset from carrier -22 dBr
at ±20 MHz offset fro m carrier -30 dBr
at ±30 MHz offset from carrier -42 dBr
Error Vector Magnitude (1) EVM 2 %
Rev erse isola tio n ISOr30 33 dB
Output po w er sa turation for ref eren ce Psat 24 dBm
Power added efficiency at operation point for 18 dBm output
power (2) PAE 12 %
Current consumptoin at operation point for 18 dBm output
power (3) Icc 160 200 mA
Gain linear Gl17 dB
Gain deviation Within 200 MHz frequency band Gd-1,5 +1.5 dB
Notes: 1. OFDM signal according to 802.11a spec with Pout = 18 dBm at 54 Mbps.
2. Due to the linearity requirements in an OFDM system, the power amplifier operates in the linear mode of class-A .
3. The current consumption of the PA can be controlled by the Pin Vctl. For lower output power demand, the current can be
reduced, while the power gain remains nearly constant.
4ATR3515 4514E–WIRE–02/03
Figure 3. Application Circuit
Vcc_ctl Vcc1
Input
Vctl
* microstrip line
*Output
*
Vcc2
ATR3515
5
ATR3515
4514E–WIRE–02/03
Package Information
Ordering Information
Extended Type Number Package Remarks
ATR3515-PES QFN 16 Tube, MOQ 750
ATR3515-PEQ QFN 16 Taped and reeled, MOQ 6000
Printed on recycled paper.
© Atmel Corporation 2003.
Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty
which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors
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components in life suppor t devices or systems.
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4514E–WIRE–02/03 xM
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