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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
14
13
12
11
10
9
8
7
6
5
4
3
2
1
16
15
IF AMP
RFDEC
RFIN
GND
IFVCC
GND
MIXLOADB
MIXLOAD
RFAGC
RF3334
IF LOW NOISE AMPLIFIER/MIXER
• Cable Set Top Box
• General Purpose Downconverter
• Commercial and Consumer Systems
The RF3334 is an IF LNA/Mixer suitable for downconver-
sion of forward channel control data in a set-top box appli-
cation. It consists of a single-ended 75
Ω terminated LNA,
followed by a differential gain control stage with 30dB of
analog gain control and a double-balanced mixer. The
mixer load is available via pins 10 and 11 should an exter-
nal filter be required. The mixer output is connected to an
IF amplifier that can be configured from 10dB to 40dB
gain with an external resistor. The amplifier is capable of
6V pk-pk output into a 1k
Ω load.
• 30dB RF Gain Control
• 40dB IF Gain Control
• 5dB Max. Noise Figure SSB
• LNA Input Internally Matched to 75
Ω
• Single 5V Supply
RF3334
LNA Mixer
RF3334 PCBA
Fully Assembled Evaluation Board
0
Rev A5 031020
0.10
CA B
M
0.35
0.23
Pin 1 ID
0.20 R
2.25
1.95
SQ.
0.65
0.75
0.50
TYP
0.60
0.24
TYP
0.05 C
0.90
0.85
0.70
0.65
0.05
0.00
12°
MAX
-C-
SEATING
PLANE
Shaded lead is pin 1.
Dimensions in mm.
0.10 C A
2 PLCS
-A-
4.00 SQ.
0.10 C B
2 PLCS
0.10 C B
2 PLCS
-B-
3.75 SQ
1.87 TYP
0.10 C A
2 PLCS
2.00 TYP
Package Style: QFN, 16-Pin, 4x4
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