RF2948BPCBA datasheet(1/18 Pages) RFMD

部件名	RF2948BPCBA

功能描述	2.4GHz SPREAD-SPECTRUM TRANSCEIVER

PDF	18 Pages

Scroll/Zoom	100%

制造商	RFMD [RF Micro Devices]

网页	http://www.rfmd.com

标志

1 / 18 page

11-239

Product Description

Ordering Information

Typical Applications

Features

Functional Block Diagram

RF Micro Devices, Inc.

7628 Thorndike Road

Greensboro, NC 27409, USA

Tel (336) 664 1233

Fax (336) 664 0454

http://www.rfmd.com

Optimum Technology Matching® Applied

Si BJT

GaAs MESFET

GaAs HBT

Si Bi-CMOS

SiGe HBT

Si CMOS

InGaP/HBT

GaN HEMT

SiGe Bi-CMOS

32

31

30

29

I OUT

24

28

27

VCC1

4

RX IF IN

5

PD

1

RX EN

2

RX IF BIAS

3

TX IF IN

6

VCC9

7

TX VGC

8

9

10

11

12

13

14

15

16

IF1 OUT-

17

IF1 OUT+

18

TXQ BP

21

TXQ DATA

22

TXI BP

19

TXI DATA

20

VCC4

23

25

Logic

REF

Phase

Splitter

BW

Control

gm-C

LPF

gm-C

LPF

gm-C

LPF

TX

Bias

gm-C

LPF

Σ

÷2

DC

Feedback

DC

Feedback

26

RF2948B

2.4GHz SPREAD-SPECTRUM TRANSCEIVER

• IEEE 802.11b WLANs

• Wireless Residential Gateways

• Secure Communication Links

• High Speed Digital Links

• Wireless Security

• Digital Cordless Telephones

The RF2948B is a monolithic integrated circuit specifi-

cally designed for direct-sequence spread-spectrum sys-

tems operating in the 2.4GHz ISM band. The part

includes: a direct conversion from IF receiver with vari-

able gain control; quadrature demodulator; I/Q baseband

amplifiers; and, on-chip programmable baseband filters.

For the transmit side, a QPSK modulator and upconverter

are provided. The design reuses the IF SAW filter for

transmit and receive reducing the number of SAW filters

required. Two-cell or regulated three-cell (3.6V maxi-

mum) battery applications are supported by the part. The

part is also designed to be part of a 2.4GHz chipset con-

sisting of the RF2494 LNA/Mixer, one of the many RFMD

high-efficiency GaAs HBT PA’s and the RF3000 Base-

band Processor.

• 45MHz to 500MHz IF Quad Demod

• On-Chip Variable Baseband Filters

• Quadrature Modulator and Upconverter

• 2.7V to 3.6V Operation

• Part of IEEE802.11b Chipset

• 2.4GHz PA Driver

RF2948B

2.4GHz Spread-Spectrum Transceiver

RF2948BTR13

2.4GHz Spread-Spectrum Transceiver (Tape & Reel)

RF2948B PCBA

Fully Assembled Evaluation Board

0

Rev A6 040930

Shaded lead is pin 1.

-B-

2.50 TYP.

2.37 TYP.

5.00 SQ.

-A-

3

2 PLCS

0.10 C A

2 PLCS

0.10 C B

4.75 SQ.

2 PLCS

0.10 C A

2 PLCS

0.10 C B

0.05

0.00

0.70

0.65

12°

MAX

-C-

SEATING

PLANE

0.90

0.85

0.05 C

0.50

3.45

3.15

SQ.

Pin 1 ID

R.20

0.50

0.30

2

0.30

0.18

0.60

0.24

TYP.

C A B

0.10 M

Dimensions in mm.

Package Style: QFN, 32-Pin, 5x5

NOT FOR NEW DESIGNS

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