8-1
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
16
15
14
13
11
12
9
10
5
6
7
8
2
1
4
3
IF OUT+
IF OUT-
GND
LO IN
LNA GAIN
LNA IN
LNA EMITTER
LNA OUT
RF2870
CDMA LOW NOISE AMPLIFIER/MIXER
900MHz DOWNCONVERTER
• CDMA Cellular Systems
• JCDMA Cellular Systems
• AMPS Cellular Systems
• General Purpose Downconverter
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
The RF2870 is a receiver front-end for CDMA cellular
applications. It is designed to amplify and downconvert
RF signals, while providing 28.5dB of stepped gain con-
trol range. Features include digital control of LNA gain,
mixer gain, and power down mode. Another feature of the
chip is adjustable IIP3 of the mixer using an off-chip cur-
rent setting resistor. Noise figure, IP3, and other specs
are designed to be compatible with the IS-98B interim
standard for CDMA cellular communications. The IC is
manufactured on an advanced Silicon Germanium Bi-
CMOS process and is assembled in a 3mmx3mm, 16-
pin, QFN package.
• 3mmx3mm LNA/Mixer Solution
• Adjustable Mixer Current/IIP3
• Meets IMD Tests with Three Gain
States/Two Logic Control Lines
• Integrated TX LO Buffer Amplifier
• All Pins ESD Protected
RF2870
CDMA Low Noise Amplifier/Mixer 900MHz Downcon-
verter
RF2870 PCBA
Fully Assembled Evaluation Board
0
Rev A8 030507
0.90
0.85
0.05 C
0.05
0.00
0.70
0.65
12°
MAX
-C-
SEATING
PLANE
1.50 TYP
0.10 C A
2 PLCS
-A-
3.00
0.10 C B
2 PLCS
1.37 TYP
0.10 C A
2 PLCS
2.75 SQ
0.10 C B
2 PLCS
3.00
-B-
0.60
0.24
TYP
0.50
0.30
PIN 1 ID
R.20
0.50
1.65
1.35
SQ.
0.10
C AB
M
0.30
0.18
2
NOTES:
1. Shaded lead is pin 1.
Dimension applies to plated terminal: to be measured
between 0.20 mm and 0.25 mm from terminal end.
2
Dimensions in mm.
Package Style: QFN, 16-Pin, 3x3
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