RF3334 Datasheet PDF - RF Micro Devices

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RF3334
RF Micro Devices

Part Number RF3334
Description IF LOW NOISE AMPLIFIER/MIXER
Page 14 Pages


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Typical Applications
• Cable Set Top Box
• General Purpose Downconverter
RF3334
IF LOW NOISE AMPLIFIER/MIXER
• Commercial and Consumer Systems
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 75terminated 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 1kload.
Optimum Technology Matching® Applied
Si BJT
9Si Bi-CMOS
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
InGaP/HBT
GaN HEMT
SiGe Bi-CMOS
16 15 14 13
RFDEC 1
12 RFAGC
RFIN 2
11 MIXLOAD
2 PLCS
-A- 0.10 C A
4.00 SQ.
2.00 TYP
0.70
0.65
0.10 C B
2 PLCS
0.05 C
0.90
0.85
0.05
0.00
0.10 C B
2 PLCS
0.10 C A
2 PLCS
3.75 SQ
0.60
0.24
TYP
12°
MAX
-B-
1.87 TYP
-C-
Shaded lead is pin 1.
Dimensions in mm.
0.35
0.23
0.10 M C A B
Pin 1 ID
0.20 R
SEATING
PLANE
2.25
1.95
SQ.
0.75 TYP
0.50
0.65
Package Style: QFN, 16-Pin, 4x4
Features
• 30dB RF Gain Control
• 40dB IF Gain Control
• 5dB Max. Noise Figure SSB
• LNA Input Internally Matched to 75
• Single 5V Supply
GND 3
IFVCC 4
IF AMP
10 MIXLOADB
9 GND
5678
Ordering Information
RF3334
LNA Mixer
RF3334 PCBA Fully Assembled Evaluation Board
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



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RF3334
Absolute Maximum Ratings
Parameter
Supply Voltage
IF Input Level
Operating Ambient Temperature
Storage Temperature
Rating
-0.5 to 7.0
500
-40 to +85
-40 to +150
Unit
VDC
mVpp
°C
°C
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
Parameter
DC Specifications
Supply Voltage
Supply Current
RFAGC Control Voltage
RFAGC Input Impedance
AC Specifications
LNA + AGC + Mixer
RF Frequency Range
RF Input 3dB Bandwidth
RF Input Impedance
RF Input VSWR
Mixer Output 3dB Bandwidth
Mixer Output Impedance
Mixer Output VSWR
Maximum Gain
Minimum Gain
Output 1dB Compression
Input IP3, Maximum Gain
Input IP3, Minimum Gain
Noise Figure
LO
LO Frequency Range
LO Input Impedance
LO Input VSWR
LO Input Level
LO Bandwidth
LO Rejection to RF Input
LO Rejection to Input of IF
Amplifier
IF Amplifier
IF Frequency Range
Input Impedance
Output Impedance
Differential Voltage Gain
Gain Set Resistor=2500
Gain Set Resistor=140
Gain Set Resistor=5
IF 3dB Bandwidth
Equivalent Input Noise
Output Swing
Output 1dB Compression
Output IP3
8-458
Specification
Min.
Typ.
Max.
4.75 5 5.25
20 24
0.5 4.5
300
Unit Condition
V
mA
V 0.5V=Minimum Gain
4.5V=Maximum Gain
k
0 to 700
700
75
1.4
100
300
1.2
27 30
-2
90
78
79
0 to 800
75
1.6:1
80
800
50
65
0 to 120
4000
10
10
31
40
140
1.5
6
127
137
MHz
On-chip signal path is DC-coupled, minimum
frequency depends on external AC coupling
components.
MHz
On-chip signal path is DC-coupled, minimum
frequency depends on external AC coupling
components.
At 100MHz
MHz
Defined by on-chip first-order low-pass filter
Differential
At 100MHz
dB RFAGC=4.5V
dB RFAGC=0.5V
dBµV(rms) Maximum Gain
dBµV(rms) LNA Input to Mixer Output
dBµV(rms) LNA Input to Mixer Output
5 dB SSB, Cascaded LNA, AGC & Mixer
MHz
Differential
dBuV
MHz
dB
dB
MHz
Differential
Differential
dB R1=1k
dB R1=1k
dB R1=1k
MHz
Gain Set=5
µVrms Gain Set=140
8
VP-P
Into 1kload, at 50MHz
dBµV(rms) Into 1kload, at 50MHz
dBµV(rms) Into 1kload, at 50MHz
Rev A5 031020



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RF3334
Parameter
Thermal
ThetaJC
Maximum Measured Junction
Temperature at
DC Bias Conditions
Specification
Min.
Typ.
Max.
65
95
Unit
°C/W
°C
Condition
VCC=5.25V, VRFAGC=4.5V, ICC=29mA,
PDISS = 154 mW
TAMB = +85°C
Rev A5 031020
8-459



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RF3334
Pin Function Description
Interface Schematic
1 RFDEC External decoupling capacitor for RF single-ended to differential con-
verter.
VCC
100
RFDEC
2 RF LNA Input, Internally matched to 75. Should be AC-coupled.
VBIAS
RF
3
GND
Ground.
4
IFVCC
5V supply for IF section.
5
IFSET
IF Gain select. The resistance between this pin and pin 6 (IFSETB)
determines the gain of the IF amplifier. Maximum gain is achieved by
placing a short circuit between the pins. Larger values of resistance will
reduce the IF gain according to the following equation where R is the
value of resistance between pins 5 and 6.
IFSET
IF Gain = 20 log (1600 /(R = 75)) 15.
6 IFSETB Complementary IF Gain select.
IFSET
IFSETB
IFSETB
7
IFOUT
IF Amplifier Output. Differential output of the IF amplifier. The differen-
tial load across this pin and pin 8 (IFOUTB) should be 1kor greater
VCC
for optimal performance. The differential output impedance across this
pin and pin 8 in 10.
VBIAS
IF OUT
8 IFOUTB Complementary IF Amplifier Output.
VBIAS
VCC
IF OUTB
9
GND
Ground.
10 MIXLOADB Complementary Mixer load.
MIXLOAD
MIXLOADB
11 MIXLOAD Differential output of the RF mixer. A resonant load should be applied to
this pin and pin 10 (MIXLOADB) that will act as a bandpass filter at the
desired IF frequency. VCC should be supplied to this pin via an inductor
or a resistor. Use of a resistor will degrade intermodulation perfor-
mance.
8-460
MIXLOAD
MIXLOADB
Rev A5 031020



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