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RF Micro Devices - CDMA LOW NOISE AMPLIFIER/MIXER 900MHz DOWNCONVERTER

Numéro de référence RF2870
Description CDMA LOW NOISE AMPLIFIER/MIXER 900MHz DOWNCONVERTER
Fabricant RF Micro Devices 
Logo RF Micro Devices 





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RF2870 fiche technique
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Typical Applications
• CDMA Cellular Systems
• JCDMA Cellular Systems
• AMPS Cellular Systems
RF2870
CDMA LOW NOISE AMPLIFIER/MIXER
900MHz DOWNCONVERTER
• General Purpose Downconverter
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
Product Description
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.
Optimum Technology Matching® Applied
Si BJT
GaAs HBT
GaAs MESFET
Si Bi-CMOS
InGaP/HBT
SiGe HBT
Si CMOS
9GaN HEMT
SiGe Bi-CMOS
16 15 14 13
IF OUT+ 1
12 LNA OUT
IF OUT- 2
11 LNA EMITTER
GND 3
10 LNA IN
LO IN 4
9 LNA GAIN
5678
Functional Block Diagram
0.10 C A
-A-
3.00
2 PLCS
1.50 TYP
2 PLCS
0.10 C B
0.70
0.65
0.05 C
0.90
0.85
0.05
0.00
3.00
2 PLCS
0.10 C B
2 PLCS
0.10 C A
2.75 SQ
-B-
1.37 TYP
0.60
0.24
TYP
NOTES:
1. Shaded lead is pin 1.
2 Dimension applies to plated terminal: to be measured
between 0.20 mm and 0.25 mm from terminal end.
12°
MAX
Dimensions in mm.
SEATING
-C- PLANE
0.10 M C A B
0.30
0.18 2
PIN 1 ID
R.20
0.50
0.30
1.65
1.35
SQ.
0.50
Package Style: QFN, 16-Pin, 3x3
Features
• 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
Ordering Information
RF2870
CDMA Low Noise Amplifier/Mixer 900MHz Downcon-
verter
RF2870 PCBA Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Rev A8 030507
8-1

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