ATR3515 Datasheet, PDF (1/7 Pages) ATMEL Corporation – 5-GHz WLAN Power Amplifier for 802.11a

Features
• Frequency Range 4.9 GHz to 5.9 GHz
• Supply-voltage 2.7 V to 3.6 V
• 2.5% EVM at 19 dBm Output Power at 54 Mbit/s OFDM
• 26.5 dB P_1dB
• On-chip Power Detector with 20 dB Dynamic Range
• Power-down Mode and Biasing Control
• Low Profile Lead-free Plastic Package QFN16 (4 ´ 4 ´ 0.9 mm)
Applications
• IEEE 802.11a OFDM WLAN
• Hiperlan2 WLAN
• PC Cards, PCMCIA
• 5 GHz ISM Band Application
Electrostatic sensitive device.
Observe precautions for handling.
5-GHz WLAN
Power Amplifier
for 802.11a
ATR3515
Description
Preliminary
Process
The 5-GHz power amplifier is designed in Atmel’s advanced Silicon-Germanium
(SiGe) process and provides excellent linearity and noise performance as well as
good power-added efficiency.
Circuitry
The PA consists of a two-stage amplifier with a P_1db of 26 dBm. The output stage was
realized using an open-collector structure. Power-up/down and output level are con-
trolled at bias control pin 6 (VCTL). An on-chip power detector provides a voltage
proportional to the output power.
Figure 1. Block Diagram
VCC1
15
ATR3515
RFIN
3
Matching
VCC2
13
RFOUT
11
RFOUT
10
Bias control
Power
Detector
6
VCTL
16
VCC_CTL
7
VDET_OUT
Rev. 4514H–WLAN–12/03