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Optimum Technology Matching® Applied

GaAs HBT

InGaP HBT

GaAs MESFET

SiGe BiCMOS

Si BiCMOS

SiGe HBT

GaAs pHEMT

Si CMOS

Si BJT

GaN HEMT

Functional Block Diagram

RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-

mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.

Product Description

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or customerservice@rfmd.com.

Ordering Information

BiFET HBT

LDMOS

IF OUT+

IF OUT-

GND

LO IN

G2

LNA IN

LNA EMITTER

LNA OUT

8

7

6

5

3

4

1

2

13

14

15

16

10

9

12

11

RF2861

CDMA LOW NOISE AMPLIFIER/MIXER

900MHz DOWNCONVERTER

The RF2861 is a receiver front-end for CDMA cellular applications, includ-

ing JCDMA and CDMA450. It is designed to amplify and downconvert RF

signals, using a three gain state LNA to obtain 17dB of stepped gain con-

trol. Features include digital control of LNA gain and power down mode,

along with an integrated TX LO buffer amplifier. Another feature of the chip

is adjustable IIP3 of the LNA and mixer using off-chip current setting resis-

tors to allow for minimum DC current consumption. Noise figure, IIP3, and

other specs are designed to be compatible with the TIA/EIA 98D standard

for CDMA cellular communications. The IC is manufactured on an

advanced Silicon Germanium Bi-CMOS process and is in a 3mm x 3mm,

16-pin, QFN.

Features



3mm x 3mm LNA/Mixer

Solution



Adjustable LNA and Mixer

Current/IIP3



Meets IMD Tests with Three

Gain States/Two Logic

Control Pins



Integrated TX LO Buffer

Amplifier



Full ESD Protection on all Pins

Applications



CDMA/JCDMA Cellular

Systems



CDMA450 Handsets/Data

Cards



AMPS Cellular Systems



General Purpose LNA and

Downconverter



Commercial and Consumer

Systems



Portable Battery-Powered

Equipment

RF2861SQ

Sample bag with 25 pieces

RF2861SR

7" Reel with 100 pieces

RF2861TR7

7" Reel with 2500 pieces

RF2861PCK-410

460MHz to 900MHz PCBA with 5-piece sample bag

DS120220

RF2861CDMA

Low Noise

Ampli-

fier/Mixer

900MHz

Downcon-

verter



Package Style: QFN, 16-pin, 3mm x 3mm