max2247ebct Maxim Integrated Products, Inc., max2247ebct Datasheet

max2247ebct

Manufacturer Part Number

max2247ebct

Description

Max2247 2.4ghz Sige Linear Power Amplifier

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX2247EBCT.pdf (10 pages)

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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

1.5mm

in small form factors.

19-2520; Rev 4; 8/03

UCSP is a trademark of Maxim Integrated Products, Inc.

HomeRF is a trademark of HomeRF Working Group.

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.

4 chip-scale package (UCSP™), measuring only

IEEE 802.11b DSSS WLAN

IEEE 802.11g OFDM WLAN

HomeRF™

2.4GHz Cordless Phones

2.4GHz ISM Radios

2mm, making it the ideal solution for radios built

________________________________________________________________ Maxim Integrated Products

General Description

2.4GHz SiGe Linear Power Amplifier

Applications

*Requires special solder temperature profile in the Absolute

Maximum Ratings Sections.

Typical Operating Circuit appears at end of data sheet.

MAX2247EBC-T

TOP VIEW

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

PART

BIAS

GND3

RF_

OUT

-40°C to +85°C

TEMP RANGE

MAX2247

SHDN

Ordering Information

Pin Configuration

GND2

PIN-

PACKAGE

PD_

OUT

4 UCSP*

2mm)

Features

RF_IN

GND1

MARK

AAW

TOP

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max2247ebct Summary of contents

Page 1

... IEEE 802.11g OFDM WLAN HomeRF™ 2.4GHz Cordless Phones 2.4GHz ISM Radios UCSP is a trademark of Maxim Integrated Products, Inc. HomeRF is a trademark of HomeRF Working Group. ________________________________________________________________ Maxim Integrated Products 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. ...

Page 2

SiGe Linear Power Amplifier ABSOLUTE MAXIMUM RATINGS RF_OUT to GND....................-0.3V to +4. SHDN, BIAS, PD_OUT ................................-0. Input Power (50Ω source)...........................................+5dBm RF_IN Input Current............................................................±1mA Maximum VSWR Without Damage ...

Page 3

SiGe Linear Power Amplifier AC ELECTRICAL CHARACTERISTICS = 2.45GHz, SHDN = V (MAX2247 EV kit +3V, f CC_ RF PARAMETER RF Frequency Range (Notes CC_ Power Gain (Notes CC_ V ...

Page 4

SiGe Linear Power Amplifier ( 2.45GHz, with MAX2247 EV kit optimized for P CC_ RF OUTPUT POWER, SUPPLY CURRENT vs. SUPPLY VOLTAGE MAX2247 toc01 30 550 INPUT POWER ADJUSTED TO KEEP ADJ/ALT CPR = -30dBc/-50dBc ...

Page 5

SiGe Linear Power Amplifier ( 2.45GHz, with MAX2247 EV kit optimized for P CC_ RF ADJ CPR vs. FREQUENCY - +23dBm OUT - +85°C - +25°C A -30 ...

Page 6

SiGe Linear Power Amplifier BUMP NAME Bias Control. The overall current is set by the current sourced through the bias pin. See the Bias Circuitry A1 BIAS section. S econd - S tag ...

Page 7

SiGe Linear Power Amplifier Detailed Description The MAX2247 linear power amplifier (PA) offers a wide variety of features incorporated into a tiny UCSP pack- age. The device includes internal bias circuitry, an inte- grated power detector with buffered output, ...

Page 8

SiGe Linear Power Amplifier POWER BIAS DETECTOR CIRCUIT RF OUTPUT MAX2247 Figure 2. The MAX2247 Connected to the Current DAC of the MAX2820 for Bias Control Applications Information The MAX2247 is a three-stage amplifier that requires special attention to ...

Page 9

SiGe Linear Power Amplifier To achieve optimum gain, output power, thermal perfor- mance, and ACPR performance, ground vias should be properly placed throughout the layout. Each ground pin requires its own through-hole via (diameter = 10mils) placed as near ...

Page 10

SiGe Linear Power Amplifier (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) Maxim cannot assume responsibility for use of any circuitry other than circuitry ...

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