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RF9936

8

Typical Applications

鈥?CDMA/TDMA/DCS1900 PCS Systems

鈥?PHS 1500/WLAN 2400 Systems

鈥?Receivers Employing Diversity Antennas

鈥?General Purpose Downconverter

鈥?Micro-Cell PCS Base Stations

鈥?Portable Battery Powered Equipment

PCS LOW NOISE AMPLIFIER/MIXER

D

E

R

F9

S

98

IG

6

N

S

.157

.150

.033

1

Product Description

N

E

ro

W

d

.050

.016

.010

.008

Optimum Technology Matching廬 Applied

Si BJT

Si Bi-CMOS

!

GaAs HBT

SiGe HBT

Package Style: SSOP-24

GaAs MESFET

Si CMOS

Features

鈥?Complete Receiver Front-End

鈥?Analog RF Gain Control

鈥?Single 3.6V Power Supply

鈥?Digitally Selectable LNA Inputs

鈥?Digitally Selectable Buffered LO Output

鈥?1500MHz to 2500MHz Operation

LNA SEL 1

VCC1 2

VCC2 3

N

S

O

ee

T

LNA2 IN 5

GND2 6

GND3 7

LNA1 IN 8

GND4 9

U

F

pg

O

ra

R

de

d

P

24 GC

GAIN

ADJUST

23 GND9

22 VCC4

GND1 4

21 GND8

20 LNA OUT

19 GND7

SEL.

LOGIC

18 MIX RF IN

17 GND6

16 IF-

15 IF+

14 GND5

VCC3 10

Ordering Information

RF9936

RF9936 PCBA

PCS Low Noise Amplifier/Mixer

Fully Assembled Evaluation Board

LO BUFF EN 11

LO IN 12

13 LO BUFF OUT

Functional Block Diagram

RF Micro Devices, Inc.

7625 Thorndike Road

Greensboro, NC 27409, USA

Tel (336) 664 1233

Fax (336) 664 0454

http://www.rfmd.com

Rev A8 000822

8-121

FRONT-ENDS

uc

t

The RF9936 is a monolithic integrated receiver front-end

for PCS applications. The IC contains all of the required

components to implement the RF functions of the

receiver front-end except for the passive filtering and LO

generation. It contains two LNAs (low-noise amplifiers), a

double-balanced Gilbert cell mixer, a balanced IF output,

an LO isolation buffer amplifier, and an LO output buffer

amplifier for providing the buffered LO signal as an out-

put. On-chip digital logic is used to enable the appropriate

LNA. The LNAs share a common output that permits

insertion of a bandpass filter between the LNA output and

the Mixer section. Analog gain adjustment is provided

which allows 10dB variation in gain. The IC is designed to

operate from a single 3.6V power supply.

.010

.004

.344

.337

.012

.008

.025

.244

.228

.069

.053

8擄MAX

0擄MIN

8

next

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