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RF2498PCBA

TRI-BAND/QUAD-MODE CDMA/GPS LOW NOISE AMPLIFIER/MIXER

RF Micro Devices 

0

Typical Applications

• CDMA/Cellular/PCS/GPS Handsets

• JCDMA/GPS Handsets

• CDMA Modem/Data Cards

RF2498

TRI-BAND/QUAD-MODE CDMA/GPS

LOW NOISE AMPLIFIER/MIXER

• Commercial and Consumer Systems

• Portable Battery-Powered Equipment

Product Description

The RF2498 is a high performance CDMA tri-band/quad-

mode integrated LNA/mixer with GPS capability. The

device is designed to meet all IS-98 sensitivity, intermod-

ulation and single-tone requirements. The RF2498 inte-

grates the tri-band LNA/downconverters with 27.5dB of

gain control for the cellular band and 29dB for the PCS

band. The RF2498 is designed for three state gain control

solutions for IS-98 IMD testing. The device offers a dedi-

cated GPS LNA/mixer with 37dB of gain. Additionally, a

divide-by-2 prescaler to allow the use of either a single- or

dual-band VCO is integrated. There is also a TX LO

buffer. The design is flexible, in that the bias currents may

DESIGNS

be set using off-chip current reference resistors for the

mixer and LNA blocks. The device is packaged in a plas-

tic, 5mmx5mm, leadless chip carrier.

EW Optimum Technology Matching® Applied

Si BJT

GaAs HBT

GaAs MESFET

N Si Bi-CMOS

SiGe HBT

Si CMOS

9 InGaP/HBT

GaN HEMT

SiGe Bi-CMOS

OR 32

31

30

29

28

27

26

25

GPS+ 1

24 GPS LNA IN

F GPS- 2

23 PCS LNA IN

CDMA+ 3

22 IP SET

T CDMA- 4

21 PCS LNA OUT

OFM+ 5

20 CELL LNA IN

NFM- 6

19 CELL LNA EMITTER

Package Style: QFN, 32-Pin, 5x5

Features

• GPS Receive Front-End Gain=37dB

• Meets IMD Tests with Three Gain

States/Two Logic Control Lines

• Adjustable Mixer and LNA Bias Current

• Selectable Divide-by-2 Prescaler

• Integrated TX LO Buffer Amplifier

VCC2 7

18 CELL LNA OUT

Ordering Information

LO IN 8

9

17 LNA GAIN

10

11

12

13

14

15

16

RF2498

RF2498 PCBA

Tri-Band/Quad-Mode CDMA/GPS Low Noise Ampli-

fier/Mixer

Fully Assembled Evaluation Board

Functional Block Diagram

RF Micro Devices, Inc.

7628 Thorndike Road

Greensboro, NC 27409, USA

Rev A4 070308

NOT FOR NEW DESIGNS

Tel (336) 664 1233

Fax (336) 664 0454

http://www.rfmd.com

8-301

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