Rev. 4514G–WLAN–09/03
Features
•Frequency Range 4.9 GHz to 5.9 GHz
•Linear POUT Typically 21 dBm
•Gain Typically 20 dB
•Power Detector On-chip
•VCC 3.1 V to 3.5 V
•Package: QFN16
Benefits
•Biasing Control Extends Battery Life Time
•AC Input Coupling Saves External Capacitors
•Very Suitable for PCMCIA Cards Type 1 (Thickness 3.3 mm)
Electrostatic sensitive device.
Observe precautions for handling.
Description
Process
The 5-GHz power amplifier is designed in Atmel’s advanced Silicon-Germanium
(SiGe) process and provides excellent noise performance as well as good power-
added efficiency.
Circuitry
The PA consists of a two-stage amplifier with a linear output power of 21 dBm. The
output stage was realized using an open-collector structure. Power-up/down and out-
put level are controlled at bias control pin 6 (Vctl). An on-chip power detector provides
a voltage proportional to the output power.
Figure 1. Block Diagram
Matching
RFin
3
RFout
11
6
Vctl
16
Vcc_ctl
Vcc1
15
Vcc2
13
ATR3515
RFout
10
Bias control Power
Detector
7
Vdet_out
5-GHz WLAN
Power Amplifier
for 802.11a
ATR3515
Preliminary
2ATR3515 [Preliminary]
4514G–WLAN–09/03
Pin Configuration
Figure 2. Pinning QFN16
GND
NC
RFin
GND
GND
RFout
RFout
GND
Vcc_ctl
Vcc1
GND
Vcc2
GND
Vctl
Vdet_out
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 NC Not connected
3RFinRF input
4 GND Ground
5 GND Ground
6 Vctl Power-up/biasing control voltage
7 Vdet_out Power detector output voltage
8 GND Ground
9 GND Ground
10 RFout RF output
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 [Preliminary]
4514G–WLAN–09/03
Electrical Characteristics
VCC = 3.3 V, Frequency = 5.25 GHz, Tamb = 25°C, unless otherwise specified
No. Parameters Test Conditions Pin Symbol Min. Typ. Max. Unit Type*
1.0 Frequency range f4.90 5.90 GHz A
1.1 Ambient temperature
range Tamb -25 +75 °C C
1.2 Supply voltage VCC 3.1 3.3 3.5 V A
1.3 Linear output power Single tone signal Plin 21 dBm A
1.4 P1dB output power Single tone signal P1dB 26.5 dBm A
1.5 Control voltage range PA operating mode Vctl 1.3 1.9 V A
1.6 Power down Vctl 0.2 V A
1.7 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 0.5 0.6 µs C
1.8 Input and output return
loss With external matching -12 -8 dB C
1.9
Spectrum mask(1)
at ±11 MHz offset from
carrier -22 dBr B
1.10 at ±20 MHz offset from
carrier -30 dBr B
1.11 at ±30 MHz offset from
carrier -42 dBr B
1.12 Error Vector Magnitude(1) EVM 4.5 % C
1.13 Reverse isolation ISOr30 36 dB C
1.14 Output power saturation For reference Psat 28 dBm C
1.15 Power added efficiency At operation point for
21 dBm output power(2) PAE 12 % A
1.16 Current consumption At operation point for
21 dBm output power(3) Icc 320 390 mA A
1.17 Gain linear Gl20 dB A
1.18 Gain deviation Within 200 MHz
frequency band Gd-1 +1 dB A
2.0 Power Detector
2.1 Voltage Vdetmin Pdetmin = 2 dBm Vdetmin 0.02 V A
2.2 Voltage Vdetmax
Pdetmax = 21 dBm Vdetmax
1.9 V A
2.3 Pdetmax = 28 dBm 2.4 V A
2.4 Settling time 0.5 µs C
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes: 1. OFDM signal according to 802.11a specification with Pout = 21 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 [Preliminary]
4514G–WLAN–09/03
Figure 3. Application Circuit
Vcc_ctl
Vcc1
Input
Vctl
* microstrip line
*
Output
Vcc2
ATR3515
*
*
Vdet_out
5
ATR3515 [Preliminary]
4514G–WLAN–09/03
Package Information
Ordering Information
Extended Type Number Package Remarks
ATR3515-PES QFN16 - 4x4 Tube, MOQ 750
ATR3515-PEQ QFN16 - 4x4 Taped and reeled, MOQ 6,000
Printed on recycled paper.
Disclaimer: 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 which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and
does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are
granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel’s products are not authorized for use
as critical components in life support devices or systems.
Atmel Corporation Atmel Operations
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 487-2600
Regional Headquarters
Europe
Atmel Sarl
Route des Arsenaux 41
Case Postale 80
CH-1705 Fribourg
Switzerland
Tel: (41) 26-426-5555
Fax: (41) 26-426-5500
Asia
Room 1219
Chinachem Golden Plaza
77 Mody Road Tsimshatsui
East Kowloon
Hong Kong
Tel: (852) 2721-9778
Fax: (852) 2722-1369
Japan
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
Tel: (81) 3-3523-3551
Fax: (81) 3-3523-7581
Memory
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 436-4314
Microcontrollers
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 436-4314
La Chantrerie
BP 70602
44306 Nantes Cedex 3, France
Tel: (33) 2-40-18-18-18
Fax: (33) 2-40-18-19-60
ASIC/ASSP/Smart Cards
Zone Industrielle
13106 Rousset Cedex, France
Tel: (33) 4-42-53-60-00
Fax: (33) 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906, USA
Tel: 1(719) 576-3300
Fax: 1(719) 540-1759
Scottish Enterprise Technology Park
Maxwell Building
East Kilbride G75 0QR, Scotland
Tel: (44) 1355-803-000
Fax: (44) 1355-242-743
RF/Automotive
Theresienstrasse 2
Postfach 3535
74025 Heilbronn, Germany
Tel: (49) 71-31-67-0
Fax: (49) 71-31-67-2340
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906, USA
Tel: 1(719) 576-3300
Fax: 1(719) 540-1759
Biometrics/Imaging/Hi-Rel MPU/
High Speed Converters/RF Datacom
Avenue de Rochepleine
BP 123
38521 Saint-Egreve Cedex, France
Tel: (33) 4-76-58-30-00
Fax: (33) 4-76-58-34-80
Literature Requests
www.atmel.com/literature
4514G–WLAN–09/03
© Atmel Corporation 2003. All rights reserved.
Atmel® and combinations thereof are the registered trademarks of Atmel Corporation or its subsidiaries.
Other terms and product names may be the trademarks of others.
