RF3334
0
Typical Applications
鈥?Cable Set Top Box
鈥?General Purpose Downconverter
鈥?Commercial and Consumer Systems
IF LOW NOISE AMPLIFIER/MIXER
Product Description
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鈩?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鈩?load.
-A-
2 PLCS
0.10 C A
0.05 C
4.00 SQ.
2.00
TYP
0.10 C B
2 PLCS
0.70
0.65
0.90
0.85
0.05
0.00
12擄
MAX
0.10 C B
2 PLCS
-B-
-C-
1.87
TYP
3.75 SQ
0.10 C A
2 PLCS
SEATING
PLANE
Shaded lead is pin 1.
Dimensions in mm.
0.10 M C A B
0.60
0.24
TYP
0.35
0.23
Pin 1 ID
0.20 R
2.25
SQ.
1.95
0.75
TYP
0.50
0.65
Optimum Technology Matching廬 Applied
Si BJT
Si Bi-CMOS
InGaP/HBT
GaAs HBT
SiGe HBT
GaN HEMT
GaAs MESFET
Si CMOS
SiGe Bi-CMOS
Package Style: QFN, 16-Pin, 4x4
Features
鈥?30dB RF Gain Control
鈥?40dB IF Gain Control
RFVCC
GND
LOB
鈥?5dB Max. Noise Figure SSB
鈥?LNA Input Internally Matched to 75鈩?/div>
12 RFAGC
16
RFDEC 1
15
14
13
LO
鈥?Single 5V Supply
RFIN 2
11 MIXLOAD
GND 3
IF AMP
10 MIXLOADB
Ordering Information
9 GND
6
7
IFOUT
8
IFOUTB
RF3334
RF3334 PCBA
LNA Mixer
Fully Assembled Evaluation Board
IFVCC 4
5
IFSET
IFSETB
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
Rev A5 031020
8-457
next