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MAX2247 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part # MAX2247
Description  2.4GHz SiGe Linear Power Amplifier
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX2247 Datasheet(HTML) 1 Page - Maxim Integrated Products

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General Description
The MAX2247 low-voltage, three-stage linear power
amplifier (PA) is optimized for 802.11b/g wireless LAN
(WLAN) applications in the 2.4GHz ISM band. The
device is integrated with an adjustable bias control,
power detector, and shutdown mode. The MAX2247
features 29dB of power gain and delivers up to
+24dBm of linear output power at 24% efficiency from a
single +3.3V supply. It achieves less than -32dBc first-
side lobe suppression and less than -55dBc second-
side lobe suppression under 802.11b modulation. In
addition, the device can be matched for optimum effi-
ciency and performance at output power levels from
+10dBm to +24dBm. Its high +28dBm saturated output
power also allows the device to meet the requirements
of 802.11g OFDM modulation.
The MAX2247 features an external bias-control pin that
allows the supply current of the device to be dynamical-
ly throttled back at lower output power levels, thus
improving efficiency while maintaining sufficient side-
lobe suppression. Proprietary internal bias circuitry
maintains stable device performance over temperature
and voltage-supply variations. An additional power-sav-
ing feature is a logic-level shutdown pin that reduces
supply current to 0.5µA and eliminates the need for an
external supply switch. The integrated shutdown func-
tion also allows guaranteed device ramp-on and ramp-
off times.
The MAX2247 integrates a power detector with 20dB
dynamic range and ±0.8dB accuracy at the highest
output power level. The detector provides a buffered
DC voltage proportional to the output power of the
device, saving cost and space by eliminating a coupler
and op amp usually required to implement a power
detector function. The device is packaged in the tiny
3 4 chip-scale package (UCSP™), measuring only
1.5mm 2mm, making it the ideal solution for radios built
in small form factors.
Applications
IEEE 802.11b DSSS WLAN
IEEE 802.11g OFDM WLAN
HomeRF™
2.4GHz Cordless Phones
2.4GHz ISM Radios
Features
♦ 2.4GHz to 2.5GHz Operating Range
♦ Up to +24dBm Linear Output Power (ACPR of
Less than -32dBc First-Side Lobe and Less than
-55dBc Second-Side Lobe)
♦ 24% PAE at +24dBm Linear Output Power, 3.3V
24% PAE at +21dBm Linear Output Power, 3.0V
♦ 29dB Power Gain
♦ On-Chip Power Detector with Buffered Output
♦ Internal 50Ω Input Matching
♦ External Bias Control for Current Throttleback
♦ Integrated Bias Circuitry
♦ +2.7V to +4.2V Single-Supply Operation
♦ 0.5µA Shutdown Mode
♦ Tiny Chip-Scale Package (1.5mm 2mm)
2.4GHz SiGe Linear Power Amplifier
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-2520; Rev 4; 8/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Typical Operating Circuit appears at end of data sheet.
PART
TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX2247EBC-T
-40°C to +85°C
3 x 4 UCSP*
AAW
TOP VIEW
BIAS
A1
GND3
B1
RF_
OUT
C1
VCC2
A2
C2
GND2
A3
PD_
OUT
B3
VCCB
C3
VCC1
A4
GND1
B4
RF_IN
C4
MAX2247
SHDN
Pin Configuration
*Requires special solder temperature profile in the Absolute
Maximum Ratings Sections.
UCSP is a trademark of Maxim Integrated Products, Inc.
HomeRF is a trademark of HomeRF Working Group.


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