Page 1
RF2411
8
Typical Applications
• UHF Digital and Analog Receivers
• Digital Communication Systems
• Spread-Spectrum Communication Systems
Product Description
The RF2411 is a monolithic integrated UHF receiver
front-end. The IC contains 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 s econd 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 inputand to provide highisolation from the LO to
the input port. The LNA section may be disabled to conserve power.
LOW NOISE AMPLIFIER/MIXER
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
• General Purpose Frequency Conversion
8
.
0
0
0
4
0
0
.
0
8
6
.
0
0
0
.
0
3
5
0.337
0.334
8° MAX
0° MIN
0.034
0.016
0.157
0.150
0
.
2
0
.
2
8
1
.
0
0
0
.
0
1
4
0.050
4
4
2
9
0.009
0.007
8
Optimum Technology Matching® Applied
Si BJT GaAs MESFETGaAs HBT
Si Bi-CMOS
LNA IN
GND
GND
GND
GND
IF OUT+
IF OUT-
ü
LNA
Si CMOS
14
13
12
11
10
9
8
LNA OUT
NC
VCC1
VCC2
RF IN-
RF IN+
LO IN
SiGe HBT
1
2
3
4
5
MIXER
6
7
RF AMP
Functional Block Diagram
Package Style: SOIC-14
Features
• Single 3V to 6.5V Power Supply
• 500MHz to 1900MHz Operation
• 25dB Small Signal Gain
• 2.5dB Cascaded Noise Figure
• 8.5mA DC Current Consumption
• -8dBm Input IP
Ordering Information
RF2411 Low Noise Amplifier/Mixer
RF2411 PCBA-L Fully Assembled Evaluation Board (850MHz)
RF2411 PCBA-H FullyAssembled Evaluation Board (1800MHz)
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro,NC 27409, USA
3
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
FRONT-ENDS
Rev A5 010717
8-23
Page 2
RF2411
Absolute Maximum Rat ings
Parameter Rating Unit
Supply Voltage -0.5 to 7.0 V
Input LO and RF Levels +6 dBm
Ambient Operating Temperature -40 to +85 °C
Storage Temperature -40 to +150 °C
DC
Caution! ESD sensitive device.
RF Micro Devices believes thefurnished 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).
8
Parameter (850MHz)
Min. Typ. Max.
Overall
RF Frequency Range 500 to 1900 MHz
IF Frequency Range DC to 150 MHz
Cascade Gain 27 dB IF=10MHz
Cascade IP3 -8 dBm Referenced to the input
Cascade Noise Figure 2.4 dB Single sideband, IF=10MHz
Specification
21 25 29 IF=50MHz
20 IF=150MHz
2.4 Single sideband, IF=50MHz
3.4 Single sideband, IF=150MHz
Unit Condition
T= 25°C, VCC=5V,RF=850MHz,
LO=0dBm, IF=50MHz, Application Sche-
matic 2 configuration
First Section (LNA)
Noise Figure 1.6 dB
Input VSWR 1.5:1
Input IP3 -3.5 dBm
Gain 14 dB
Reverse Isolation 30 dB
Output VSWR 2.0:1
Second Section (RF Amp,
Mixer, IF1)
FRONT-ENDS
Noise Figure 11.0 dB Single Sideband
Input VSWR 2.0:1
Input IP3 +6 dBm
Conversion Gain 11 dB
Output Impedance 4 kΩ Open Collector
LO Input
LO Level -6 to +6 dBm
LO to RF Rejection 30 dB
LO to IF Rejection 30 dB
LO Input V SWR 1.5:1
Power Supply
Voltage 3 to 6.5 V
Current Consumption 8 mA V
20 mA V
CC
CC
=3.0V
=5.0V
8-24
Rev A5 010717
Page 3
RF2411
Parameter (1800MHz)
Min. Typ. Max.
Overall
RF Frequency Range 500 to 1900 MHz
IF Frequency Range DC to 100 MHz
Cascade Gain 22 dB IF=10MHz
Cascade IP3 -7 dBm Referenced to the input
Cascade Noise Figure 4.0 dB Single sideband, IF=10MHz
Specification
21 IF=50MHz
17 IF=150MHz
4.0 Single sideband, IF=50MHz
4.8 Single sideband, IF=150MHz
Unit Condition
T=25°C, VCC=5V, RF=1800MHz,
LO=0dBm, IF=50MHz, Application Sche-
matic 2 configuration
First Section (LNA)
Noise Figure 2.6 dB
Input VSWR 1.2:1
Input IP3 -3.5 dBm
Gain 10 dB
Reverse Isolation 25 dB
Output VSWR 1.5:1
Second Section (RF Amp,
Mixer, IF1)
Noise Figure 10.0 dB Single Sideband
Input VSWR 2.0:1
Input IP3 +3 dBm
Conversion Gain 11 dB
Output Impedance 4 kΩ Open Collector
LO Input
LO Level -6 to +6 dBm
LO to RF Rejection 30 dB
LO to IF Rejection 30 dB
LO Input VSWR 1.2:1
8
FRONT-ENDS
Rev A5 010717
8-25
Page 4
RF2411
Pin Function Description Interface Schematic
1LNAIN
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
8
FRONT-ENDS
2GND
3GND
4GND
5GND
6IFOUT+
7IFOUT8LOIN
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
supplied to this pin. This can be done with a resistor to V
cation schematic, “ 1800MHz, Balanced Resistor Output Matching”),
with a balun (see application schematic, “1800M Hz, Output Matching
with Balun”) or when used in a single-ended configuration (see application schematic, “1800MHz, Single-Ended Resistive Output Matching”).
When using a resistor to V
impedance. Typical values for this resis tor are 200Ω to 1kΩ.A shunt
inductor/capacitor resonator to VCCis 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 “8 50MHz, Output Matching with Balun” is recommended. Using both outputs 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 VCCand
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.
the resistor value will set the output
CC
(see appli-
CC
IF OUT+
IF OUT-
9RFIN+
10 RF IN11 VCC2
12 VCC1
8-26
LO 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 schematics. To minimize the noise figure it is recommended to
have a bandpass filter before this input. This will prevent noise at the
image frequency from being converted to the IF.
Same as pin 9 except complementary input. See pin 9.
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 ofthe
bypass capacitors should connect immediately to ground plane.
RF IN+
RF IN-
BIAS
Rev A5 010717
Page 5
RF2411
Pin Function Description Interface Schematic
13 NC
14 LNA OUT
No connection.
50Ω output. An external DC blocking capacitor is required when this
pin is connected to a DC path.
LNA OUT
8
FRONT-ENDS
Rev A5 010717
8-27
Page 6
RF2411
Application Schematic
850MHz, Output Matching with Balun
8
FRONT-ENDS
RF IN
IF OUT
RF IN
T1
8:1
100 pF
V
CC
100 nF
1
2
3
4
5
MIXER
6
7
LNA
RF AMP
14
13
12
11
10
9
8
100 pF
100 pF
100 pF
Application Schematic
1800MHz, Output Ma tching with Balun
22 pF
1
LNA
14
50 Ω
Image Filter
2pF
8.2 nH
Vcc
300 pF 100 nF
LO IN
8-28
IF OUT
T1
8:1
V
CC
100 nF
2
3
4
5
MIXER
6
7
RF AMP
13
12
11
10
9
8
50 Ω
Image Filter
22 pF
22 pF
22 pF
Vcc
300 pF 100 nF
2.7 nH
LO IN
Rev A5 010717
Page 7
RF2411
Application Schemati c
1800MHz, Balanced Resistive Output Matching
RF IN
IF OUT1
IF OUT2
22 pF
1
2
3
V
DD
470 ΩL1470 ΩL2
4
5
MIXER
6
7
LNA
RF AMP
14
13
12
11
10
9
8
50 Ω
Image Filter
22 pF
22 pF
22 pF
Application Schemati c
1800MHz, Single-Ended Resistive Output Matching
RF IN
22 pF
1
2
3
LNA
14
13
12
50 Ω
Image Filter
300 pF 0.1 µF
2.7 nH
LO IN
8
FRONT-ENDS
IF OUT
Rev A5 010717
4
V
DD
470 ΩL1
5
MIXER
6
7
RF AMP
11
10
9
8
22 pF
22 pF
22 pF
2.7 nH
300 pF 100 nF
LO IN
8-29
Page 8
RF2411
Evaluation Board Schema t ic
Mixer Tuned for 850MHz
(Download Bill of Materials from www.rfmd.com.)
8
FRONT-ENDS
J1
LNA IN
J2
IF OUT
T1
8:1
C1
1nF
C8
100 nF
1
2
3
4
5
MIXER
6
7
LNA
RF AMP
2411400 Rev B
P1-3 VCC
P1
14
C2
13
12
11
10
9
8
1
NC
GND
2
3
1nF
C3
300 pF
C5
1nF
C6
100 pF
C7
1nF
C4
100 nF
C9
2pF
L1
8.2 nH
J5
LNA OUT
VCC
J4
MIXER IN
J3
LO IN
8-30
Rev A5 010717
Page 9
Evaluation Board Schemati c
Mixer Tuned for 1800MHz
RF2411
J1
LNA IN
J2
IF OUT
T1
8:1
C1
1nF
C8
100 nF
C2
1
2
3
4
5
MIXER
6
7
LNA
RF AMP
2411401 Rev B
14
13
12
11
10
9
8
P1
1
NC
2
GND
P1-3 VCC
3
1nF
C3
300 pF
C5
1nF
C6
100 pF
C7
1nF
C4
100 nF
L1
2.7 nH
J5
LNA OUT
VCC
J4
MIXER IN
J3
LO IN
8
FRONT-ENDS
Rev A5 010717
8-31
Page 10
RF2411
Evaluation Board Layout 850MHz
Board Size 2.0” x 2.0”
8
FRONT-ENDS
8-32
Rev A5 010717
Page 11
Evaluation Board Layout 1800MHz
Board Size 2.0” x 2.0”
RF2411
8
FRONT-ENDS
Rev A5 010717
8-33
Page 12
RF2411
8
22
20
18
16
14
12
10
S21 (dB)
8
6
4
2
0
0 1 2 3
5
4
3
VSWR
2
LNA S21
Frequency (GHz)
LNA VSWR
InputVSWR
Vcc=2.7V
InputVSWR
Vcc=3.6V
InputVSWR
Vcc=5.0V
InputVSWR
Vcc=6.0V
Vcc=2.7V
Vcc=3.0V
Vcc=3.3V
Vcc=3.6V
Vcc=4.5V
Vcc=5.0V
Vcc=6.0V
OutputVSWR
Vcc=2.7V
OutputVSWR
Vcc=3.6V
OutputVSWR
Vcc=5.0V
OutputVSWR
Vcc=6.0V
-8
Vcc=2.7V
-12
-16
S12 (dB)
-20
-24
-28
Vcc=3.6V
Vcc=5.0V
Vcc=6.0V
0 1 2 3
LNA S12
Frequency (GHz)
FRONT-ENDS
1
0 1 2 3
Frequency (GHz)
LNA S11
8
.
1.0-1.0
0
6
.
0
4
.
0
3GHz
Vcc=2.7V
Vcc=3.6V
Vcc=5.0V
2
.
0
Vcc=6.0V
10MHz
0
0.2
0.4
2
.
0
-
4
.
0
-
6
.
0
-
1.0
0.6
0.8
8
.
0
-
2.0
Swp Max
3.01GHz
0
.
2
0
.
3
5.0
3.0
4.0
0
.
3
-
0
.
2
-
Swp Min
0.01GHz
0
.
8
.
7
.
0
10MHZ
7
.
0
.
0
-
1
9
.
0
0
8
-
Swp Max
3.01GHz
10MHZ
1.8
Swp Min
0.01GHz
2.0
1.6
9
.
0
LNA S22
Vcc=2.7V
Vcc=3.6V
Vcc=5.0V
0
.
4
0
.
5
0
.
0
1
10.0
0
.
0
1
-
0
.
5
-
0
.
4
-
0.5
Vcc=6.0V
0.6
0.7
0.8
0.9
1.0
6
.
0
5
.
0
4
.
0
3GHZ
3
.
0
2
.
0
1
.
0
1.211.4
1
.
0
-
2
.
0
-
3
.
0
-
4
.
0
-
5
.
0
-
6
.
0
-
-
8-34
Rev A5 010717
Page 13
RF2411
LO Input
8
.
1.0-1.0
0
6
.
0
4
.
0
2
.
0
0
0.2
2
.
0
-
4
.
0
-
Vcc=2.7V
Vcc=3.6V
Vcc=5.0V
Vcc=6.0V
10MHZ
0.4
3GHZ
6
.
0
-
1.0
0.6
0.8
3GHZ
8
.
0
-
2.0
3GHZ
Swp Max
3.01GHz
0
.
2
0
.
3
0
.
4
0
.
5
0
.
0
1
10.0
5.0
3.0
4.0
0
.
0
1
-
0
.
5
-
0
.
4
-
0
.
3
-
0
.
2
-
Swp Min
0.01GHz
2
.
0
0
2
.
0
-
RF Input (single ended)
8
.
1.0-1.0
0
6
.
0
4
.
0
0.2
4
.
0
-
Vcc=2.7V
Vcc=3.6V
Vcc=5.0V
Vcc=6.0V
0.4
6
.
0
-
1.0
0.6
0.8
3GHZ
8
.
0
-
Swp Max
3.01GHz
0
.
2
0
.
3
0
.
4
0
.
5
0
.
0
1
10.0
3.0
0
.
5.0
4.0
10MHZ
2
-
0
.
0
1
-
0
.
5
-
0
.
4
-
0
.
3
-
2.0
Swp Min
0.01GHz
IF Output
8
FRONT-ENDS
0
.
2
Swp Max
3.01GHz
0
.
3
0
.
4
0
.
5
0
.
0
1
8
.
1.0-1.0
0
6
.
0
4
.
0
2
.
0
Vcc=2.7V
Vcc=3.6V
Vcc=5.0V
Vcc=6.0V
0
0.2
2
.
0
-
4
.
0
-
Rev A5 010717
0.4
6
.
0
-
1.0
0.6
0.8
8
.
0
-
2.0
3.0
0
5.0
4.0
.
2
-
10.0
10MHZ3GHZ
0
.
0
0
.
5
-
0
.
4
-
0
.
3
-
Swp Min
0.01GHz
1
-
8-35
Page 14
RF2411
8
FRONT-ENDS
8-36
Rev A5 010717
Loading...