RF2411
LOW NOISE AMPLIFIER/MIXER
RoHS Compliant & Pb-Free Product
Package Style: SOIC-14
Features
Single 3V to 6.5V Power Sup-
ply
500MHz to 1900MHz Opera-
tion
25dB Small Signal Gain
2.5dB Cascaded Noise Figure
8.5mA DC Current Consump-
tion
-8dBm Input IP
3
LNA
LNA IN 1
GND 2
GND 3
GND 4
GND 5
IF OUT+ 6
IF OUT- 7
RF AMP
14 LNA OUT
13 NC
12 VCC1
11 VCC2
10 RF IN-
9 RF IN+
8 LO IN
MIXER
Applications
UHF Digital and Analog
Receivers
Digital Communication Sys-
tems
Spread-Spectrum Communi-
cation Systems
Commercial and Consumer
Systems
Portable Battery-Powered
Equipment
General Purpose Frequency
Conversion
Functional Block Diagram
Product Description
The RF2411 is a monolithic integrated UHF receiver front-end. The IC con-
tains all of the required components to implement the RF functions of the
receiver except for the passive filtering and LO generation. It contains an
LNA (low-noise amplifier), a second RF amplifier, and a balanced mixer
which can drive a single-ended or balanced load. The output of the LNA is
made available as a pin to permit the insertion of a bandpass filter
between the LNA and the RF/Mixer section. The LNA output is buffered to
permit a wide range of choices for the interstage filter without altering the
VSWR or noise figure at the LNA input and to provide high isolation from
the LO to the input port. The LNA section may be disabled to conserve
power.
Ordering Information
RF2411
RF2411 PCBA-L
RF2411 PCBA-H
Low Noise Amplifier/Mixer
Fully Assembled Evaluation Board (850MHz)
Fully Assembled Evaluation Board (1800MHz)
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
Rev A7 DS070816
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
1 of 14
RF2411
Absolute Maximum Ratings
Parameter
Supply Voltage
Input LO and RF Levels
Ambient Operating Temperature
Storage Temperature
Rating
-0.5 to 7.0
+6
-40 to +85
-40 to +150
Unit
V
DC
dBm
°C
°C
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical perfor-
mance or functional operation of the device under Absolute Maximum Rating condi-
tions is not implied.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
The information in this publication is believed to be accurate and reliable. However, no
responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any
infringement of patents, or other rights of third parties, resulting from its use. No
license is granted by implication or otherwise under any patent or patent rights of
RFMD. RFMD reserves the right to change component circuitry, recommended appli-
cation circuitry and specifications at any time without prior notice.
Parameter (850MHz)
Overall
RF Frequency Range
IF Frequency Range
Cascade Gain
Min.
Specification
Typ.
Max.
Unit
Condition
T = 25°C, V
CC
=5V, RF=850MHz, LO=0dBm,
IF=50MHz, Application Schematic 2 configura-
tion
500 to 1900
DC to 150
27
21
25
20
-8
2.4
2.4
3.4
29
MHz
MHz
dB
IF=10MHz
IF=50MHz
IF=150MHz
dBm
dB
Referenced to the input
Single sideband, IF=10MHz
Single sideband, IF=50MHz
Single sideband, IF=150MHz
dB
dBm
dB
dB
Cascade IP3
Cascade Noise Figure
First Section (LNA)
Noise Figure
Input VSWR
Input IP3
Gain
Reverse Isolation
Output VSWR
1.6
1.5:1
-3.5
14
30
2.0:1
Second Section (RF Amp,
Mixer, IF1)
Noise Figure
Input VSWR
Input IP3
Conversion Gain
Output Impedance
11.0
2.0:1
+6
11
4
-6 to +6
30
30
1.5:1
3 to 6.5
8
20
V
mA
mA
V
CC
=3.0V
V
CC
=5.0V
dBm
dB
kΩ
dBm
dB
dB
Open Collector
dB
Single Sideband
LO Input
LO Level
LO to RF Rejection
LO to IF Rejection
LO Input VSWR
Power Supply
Voltage
Current Consumption
2 of 14
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A7 DS070816
RF2411
Parameter (1800MHz)
Overall
RF Frequency Range
IF Frequency Range
Cascade Gain
500 to 1900
DC to 100
22
21
17
-7
4.0
4.0
4.8
2.6
1.2:1
-3.5
10
25
1.5:1
MHz
MHz
dB
Min.
Specification
Typ.
Max.
Unit
Condition
T = 25°C, V
CC
=5V, RF=1800MHz,
LO=0dBm, IF=50MHz, Application Schematic
2 configuration
Cascade IP3
Cascade Noise Figure
dBm
dB
IF=10MHz
IF=50MHz
IF=150MHz
Referenced to the input
Single sideband, IF=10MHz
Single sideband, IF=50MHz
Single sideband, IF=150MHz
First Section (LNA)
Noise Figure
Input VSWR
Input IP3
Gain
Reverse Isolation
Output VSWR
dB
dBm
dB
dB
Second Section (RF Amp,
Mixer, IF1)
Noise Figure
Input VSWR
Input IP3
Conversion Gain
Output Impedance
10.0
2.0:1
+3
11
4
-6 to +6
30
30
1.2:1
dB
dBm
dB
kΩ
dBm
dB
dB
Single Sideband
Open Collector
LO Input
LO Level
LO to RF Rejection
LO to IF Rejection
LO Input VSWR
Rev A7 DS070816
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
3 of 14
RF2411
Pin
1
Function
LNA IN
Description
This pin is NOT internally DC-blocked. An external blocking capacitor must
be provided if the pin is connected to a device with a DC path. A value of
100pF is recommended for 900MHz and 22pF for 1800MHz.
LNA IN
Interface Schematic
2
3
4
5
6
GND
GND
GND
GND
IF OUT+
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
Same as pin 2.
Same as pin 2.
Same as pin 2.
Balanced open collector output of the mixer. External bias needs to be sup-
plied to this pin. This can be done with a resistor to V
CC
(see application
schematic, “1800MHz, Balanced Resistor Output Matching”), with a balun
(see application schematic, “1800MHz, Output Matching with Balun”) or
when used in a single-ended configuration (see application schematic,
“1800MHz, Single-Ended Resistive Output Matching”). When using a resis-
tor to V
CC
the resistor value will set the output impedance. Typical values
for this resistor are 200Ω to 1kΩ. A shunt inductor/capacitor resonator to
V
CC
is needed to maintain proper DC voltage at the mixer. At low resistor
values the resonator may be omitted at the expense of gain, output power
and IP3. To obtain maximum gain and output power a balun as shown in
application schematics “1800MHz, Output Matching with Balun” and
“850MHz, Output Matching with Balun” is recommended. Using both out-
puts and matching them correctly to a single ended load will result in a
6dB gain improvement over the plain single ended configuration.
Same as pin 6 except complementary output.
See pin 6.
50Ω mixer LO input. This pin has an internal pull-up resistor to V
CC
and is
not DC-blocked. An external blocking capacitor must be provided if the pin
is connected to a device with a DC path. A value of 100pF is recommended
for 900MHz and 22pF for 1800MHz.
IF OUT+
IF OUT-
7
8
IF OUT-
LO IN
LO IN
9
RF IN+
Balanced mixer RF Input port. This pin is NOT internally DC-blocked. An
external blocking capacitor must be provided if the pin is connected to a
device with a DC path. A value of 100pF is recommended for 900MHz and
22pF for 1800MHz. Matching is required; see the applications schemat-
ics. To minimize the noise figure it is recommended to have a bandpass fil-
ter before this input. This will prevent noise at the image frequency from
being converted to the IF.
RF IN+
RF IN-
BIAS
10
11
12
RF IN-
VCC2
VCC1
Same as pin 9 except complementary input.
Supply voltage for the mixer bias circuits.
Supply Voltage for the LNA only. A 47pF external bypass capacitor is
required and an optional 0.01μF will be required if no other low frequency
bypass capacitors are nearby. The trace length between the pin and the
bypass capacitors should be minimized. The ground side of the bypass
capacitors should connect immediately to ground plane.
See pin 9.
4 of 14
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A7 DS070816
RF2411
Pin
13
14
Function
NC
LNA OUT
Description
No connection.
50Ω output. An external DC blocking capacitor is required when this pin is
connected to a DC path.
LNA OUT
Interface Schematic
Package Drawing
0.157
0.150
0.018
0.014
0.008
0.004
0.337
0.334
0.050
0.244
0.229
0.068
0.053
8° MAX
0° MIN
0.034
0.016
0.009
0.007
Rev A7 DS070816
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
5 of 14
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