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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
1
2
3
4
5
6
7
14
13
12
11
10
9
8
LNA IN
GND
GND
GND
GND
IF OUT+
IF OUT-
LNA OUT
NC
VCC1
VCC2
RF IN-
RF IN+
LO IN
RF AMP
MIXER
LNA
RF2411
LOW NOISE AMPLIFIER/MIXER
UHF Digital and Analog Receivers
Digital Communication Systems
Spread-Spectrum Communication Systems
Commercial and Consumer Systems
Portable Battery-Powered Equipment
General Purpose Frequency Conversion
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 second RF amplifier, and a
balanced mixer which can drive a single-ended or bal-
anced 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 inter-
stage 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 con-
serve power.
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
3
RF2411
Low Noise Amplifier/Mixer
RF2411 PCBA-L
Fully Assembled Evaluation Board (850MHz)
RF2411 PCBA-H Fully Assembled Evaluation Board (1800MHz)
8
Rev A5 010717
0.157
0.150
0.068
0.053
0.244
0.229
0.008
0.004
0.018
0.014
8 MAX
0 MIN
0.034
0.016
0.009
0.007
0.337
0.334
0.050
Package Style: SOIC-14
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RF2411
Rev A5 010717
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Absolute Maximum Ratings
Parameter
Rating
Unit
Supply Voltage
-0.5 to 7.0
V
DC
Input LO and RF Levels
+6
dBm
Ambient Operating Temperature
-40 to +85
C
Storage Temperature
-40 to +150
C
Parameter (850MHz)
Specification
Unit
Condition
Min.
Typ.
Max.
Overall
T = 25C, V
CC
=5V, RF = 850MHz,
LO= 0dBm, IF =50MHz, Application Sche-
matic 2 configuration
RF Frequency Range
500 to 1900
MHz
IF Frequency Range
DC to 150
MHz
Cascade Gain
27
dB
IF = 10MHz
21
25
29
IF = 50MHz
20
IF = 150MHz
Cascade IP3
-8
dBm
Referenced to the input
Cascade Noise Figure
2.4
dB
Single sideband, IF = 10MHz
2.4
Single sideband, IF = 50MHz
3.4
Single sideband, IF = 150MHz
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)
Noise Figure
11.0
dB
Single Sideband
Input VSWR
2.0:1
Input IP3
+6
dBm
Conversion Gain
11
dB
Output Impedance
4
k
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
1.5:1
Power Supply
Voltage
3 to 6.5
V
Current Consumption
8
mA
V
CC
= 3.0V
20
mA
V
CC
= 5.0V
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).
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RF2411
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Parameter (1800MHz)
Specification
Unit
Condition
Min.
Typ.
Max.
Overall
T = 25C, V
CC
= 5V, RF = 1800MHz,
LO= 0dBm, IF = 50MHz, Application Sche-
matic 2 configuration
RF Frequency Range
500 to 1900
MHz
IF Frequency Range
DC to 100
MHz
Cascade Gain
22
dB
IF= 10MHz
21
IF= 50MHz
17
IF= 150MHz
Cascade IP3
-7
dBm
Referenced to the input
Cascade Noise Figure
4.0
dB
Single sideband, IF =10MHz
4.0
Single sideband, IF =50MHz
4.8
Single sideband, IF =150MHz
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
k
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
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Pin
Function
Description
Interface Schematic
1
LNA IN
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.
2
GND
Ground connection. For best performance, keep traces physically short
and connect immediately to ground plane.
3
GND
Same as pin 2.
4
GND
Same as pin 2.
5
GND
Same as pin 2.
6
IF OUT+
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
CC
(see appli-
cation 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 applica-
tion schematic, "1800MHz, Single-Ended Resistive Output Matching").
When using a resistor to V
CC
the resistor value will set the output
impedance. Typical values for this resistor are 200
to 1k
. 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 omit-
ted 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 Match-
ing with Balun" is recommended. Using both outputs and matching
them correctly to a single ended load will result in a 6dB gain improve-
ment over the plain single ended configuration.
7
IF OUT-
Same as pin 6 except complementary output.
See pin 6.
8
LO IN
50
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.
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 appli-
cations 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.
10
RF IN-
Same as pin 9 except complementary input.
See pin 9.
11
VCC2
Supply voltage for the mixer bias circuits.
12
VCC1
Supply Voltage for the LNA only. A 47pF external bypass capacitor is
required and an optional 0.01
F will be required if no other low fre-
quency 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.
LNA IN
IF OUT+
IF OUT-
LO IN
BIAS
RF IN-
RF IN+
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RF2411
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Pin
Function
Description
Interface Schematic
13
NC
No connection.
14
LNA OUT
50
output. An external DC blocking capacitor is required when this
pin is connected to a DC path.
LNA OUT
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