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ü
8-123
8
FRONT-ENDS
Preliminary
Product Description
Ordering Information
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7625 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 MESFETGaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
1920212223
1
5
4
3
2
6
987 1110
15
14
13
12
24
16
17
18
Low
LNA GND
GAIN SEL
Low
LNA IN
High
LNA IN
High
LNA GND
GND
High
LNA VCC
High
MIX IN
BAND SEL
High
LNA OUT
High
LO IN
NC
MXR VCC
IF1+
IF OUT SEL
Low
LO IN
TX/RX
Low
MIX IN
VCC BIAS
Low
LNA OUT
Low
LNA VCC
IF1-
IF2+
IF2-
RF2488
MULTI-MODE DUAL-BAND LNA MIXER
• TDMA/EDGE Handsets
• TDMA IS-136 Handsets
• GAIT Handsets
• TDMA/GSM Dual-Band Handsets
• GSM/DCS/EDGE Handsets
The RF2488 is a dual-band LNA/Mixer designed to support dual-band, multi-mode handset applications. The
unique dual IF outputs provide interface to two independent IF SAW filters supporting applications that combine
IS136 with GSM, DCS or EDGE air interfaces. The device
includes four mixers, providing the ability to use two independent IF bandwidths accessible from either the low or
high band LNAs. Each LNA has a gain bypass mode controlled by the GAIN SEL pin. An image reject filter is
required between each LNA and its mixer. Power management is implemented based on a three-pin logic level
interface. Power consumption is minimized by shutting
down all but the active sections of the device.
• Complete Dual-Band Front-End
• Switchable LNA Gain
• L ow Noise and High Intercept Point
• Low Current Consumption
• Single 2.7V to 3.3V Power Supply
• Supports Dual IF Bandwidths
RF2488 Multi-Mode Dual-BandLNA Mixer
RF2488 PCBA Fully Assembled EvaluationBoard
8
Rev A0 010905
NOTES:
Shaded Pin is Lead 1.
1
Package Warpage: 0.05 mm max.
4
Die Thickness Allowable: 0.305 mm max.
5
2
Dimension applies to plated terminal: to be measured between 0.02 mm
and 0.25 mm from terminal end.
Pin 1 identifier must exist on top surface of package by identification
mark or feature on the package body. Exact shape and size is optional.
3
12°
max
1.00
0.85
.80
.65
.05
.01
.23
.13
4 PLCS
4.00
sq.
.60
.24
typ
.50
.40
.28
2
.55
.30
.45
.20
4 PLCS
2.25
1.95
sq.
Package Style: LCC, 24-Pin, 4x4
Page 2
Preliminary
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FRONT-ENDS
Absolute Maximum Ratings
Parameter Rating Unit
Supply Voltage -0.5 to +3.6 V
Input LO and RF Levels 10 dBm
Operating Ambient Temperature -40 to +85 °C
Storage Temperature -40 to +125 °C
Parameter
Specification
Unit Condition
Min. Typ. Max.
Operating Range
Supply Voltage 2.7 3 3.3 V
Supply Current 22 24 mA @ 3V in any mode. T=25°C
RF Frequency Range 800 1000 MHz Low Band
1800 2000 MHz High Band
LO Frequency Range 885 1400 MHz Low Band
1885 2400 MHz High Band
IF Frequency Range 85 400 MHz
Temperature Range -40 +85 °C
Low Noise Amplifier
Low Band
T
AMB
=25°C, VCC=3V
Frequency=869MHz to 894MHz
Gain 17 18 19 dB High Gain, GAIN SEL=High
-11 -9 -8 dB Low Gain, GAIN SEL=Low
Gain Variations versus
Temperature
±0.75 dB -40°C to +85°C
Noise Figure 1.25 1.35 d B High Gain, GAIN SEL=High
10 12 dB Low Gain, GAIN SEL=Low
Input 3rd Order Intercept 0 3 dBm High Gain, GAIN SEL=High
22 25 dBm Low Gain, GAIN SEL=Low
Return Loss 10 dB LNA Input-External Match, GAIN SEL=High
10 dB LNA Input-External Match, GAIN SEL=Low
10 dB LNA Output-External Match,
GAIN SEL=High
10 dB LNA Output-External Match,
GAIN SEL =Low
Supply Current 4 5 mA High Gain, GAIN SEL =High
0.3 0.5 mA Low Gain, GAIN SEL=Low
Mixer Low Band
T
AMB
=25°C, VCC=3V,IF=135MHz;
Mixer RF Input Frequency=869MHz to
894MHz; LO Input Frequency=1004MHz to
1029MHz
Conversion Gain 9 10 11 dB
LO Input Level -9 -6 0 dBm
Noise Figure (SSB) 10 12 dB
Input 3rd Order Intercept 6 7 dBm
Return Loss 10 dB Mixer RF Input
10 dB LO Input
Terminating Impedance,
IF Output
500 Ω Mixer “ON”
Mixer Supply Current 12 13 mA
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).
Page 3
Preliminary
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FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
Low Band Cascaded
Electrical Specification
T
AMB
=25°C, VCC=3V, IF=135MHz.
Assumes 3dB loss for image filter.
Gain 24 26 28 dB High Gain, GAIN SEL=High
-4 -2 0 dB Low Gain, GAIN SEL= Low
Gain Variations versus
Temperature
+
1.0 dB
Noise Figure 2.1 2.5 dB High Gain, GAIN SEL=High
22 24 dB Low Gain, GAIN SEL=Low
Input 3rd Order Intercept -10 -8 dBm High Gain, GAIN SEL=High
16 18 dBm Low Gain, GAIN SEL=Low
Return Los s 10 dB LNA Input-External Match, GAIN SEL=High
10 dB LNA In put-External Match, GAIN SEL=Low
10 dB Mixer RF Input
10 dB Mixer LO Input
Isolation 50 dB LO IN to LNA IN, GAIN SEL=High
35 dB LO IN to LNA IN, GAIN SEL=Low
40 45 dB LNA Out to Mixer RF In
>50 dB LO In to IF Out
>40 dB Mixer RF In to IF Out
IF Output Impedance 500 Ω Mixer “ON”
Supply Current 16 18 mA High Gain, GAIN SEL=High
13 15 mA Low Gain, GAIN SEL=Low
Low Noise Amplifier
High Band
T
AMB
=25°C, VCC=3V
Frequency=1930MHz to 1990MHz
Gain 16 17 18 dB High Gain, GAIN SEL=High
-8 -6 -4 dB Low Gain, GAIN SEL=Low
Gain Variations versus
Temperature
+
1.0 dB -40°C to 85°C
Noise Figure 1.6 1.7 dB High Gain, GAIN SEL=High
8 11 dB Low Gain, GAIN SEL=Low
Input 3rd Order Intercept 0 2 dBm High Gain, GAIN SEL=High
16 18 dBm Low Gain, GAIN SEL=Low
Return Los s 10 dB LNA Input-External Match, GAIN SEL=High
10 dB LNA In put-External Match, GAIN SEL=Low
10 dB LNA Output-External Match,
GAIN SEL=High
10 dB LNA Output-External Match,
GAIN SEL=Low
Supply Current 6 7 m A High Gain, GAIN SEL=High
0.3 0.5 mA Low Gain, GAIN SEL=Low
Mixer High Band
T
AMB
=25°C, VCC=3V, IF=135MHz;
Mixer RF Input Frequency=1930MHz to
1990MHz; LO Output Frequency=2065MHz
to 2125MHz
Conversion Gain 10 11 12 dB
LO Input Level -9 -6 0 dBm
Noise Figure (SSB) 10 12 dB
Input 3rd Order Intercept 5 7 dBm
Return Loss, Mixer RF Input 10 dB
LO Input 10 dB
Terminating Impedance
IF Output
500 Ω Mixer “ON”
Mixer Supply Current 16 17 mA
Page 4
Preliminary
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FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
High Band Cascaded
Electrical Specification
T
AMB
=25°C, VCC=3V,IF=135MHz.
Assumes 3dB loss for image filter.
Gain 22 24 26 dB High Gain, GAIN SEL=High
-2 0 2 dB Low Gain, GAIN SEL=Low
Gain Variations versus
Temperature
+
1.5 dB
Noise Figure 2.6 3.0 dB High Gain, GAIN SEL=High
20 25 dB Low Gain, GAIN SEL=Low
Input 3rd Order Intercept -10 -8 dBm High Gain, GAIN SEL=High
16 18 dBm Low Gain, GAIN SEL=Low
Return Loss 10 dB LNA Input-External Match, GAIN SEL=High
10 dB LNA Input-External Match, GAIN SEL=Low
10 dB Mixer RF Input
10 dB Mixer LO Input
Isolation 50 dB LO IN to LNA IN, GAIN SEL=High
50 dB LO IN to LNA IN, GAIN SEL=Low
40 45 dB LNA Out to Mixer RF In
>50 dB LO In to IF Out
>60 dB Mixer RF In to IF Out
Half IF Spur -68 -60 dBc
IF Output Impedance 500 Ω Mixer“ON”
Supply Current 22 24 mA High Gain, GAIN SEL=High
18 22 mA Low Gain, GAIN SEL=Low
Logic Levels
Input Low 0.5 V VCC=2.7V to 2.9V
Input High 2.0 V V
CC
=2.7V to 2.9V
Input Current 10 100 µA
Input Impedance 2 20 kΩ
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Preliminary
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FRONT-ENDS
Pin Function Description Interface Schematic
1LowLNA
GND
Low band LNAgroundconnection.As an option, an external inductor to
ground may be used to reduce LNA gain.
See pin 3.
2GAINSEL
CMOS compatible signal controlling both the low band and high band
LNA gain. Logic (0)=Low Gain, Logic (1)=High Gain.
3LowLNAIN
Low band LNA input. The maximum VSWR is 2:1 (Cell/GSM RX band)
for both the gain and bypass mode. This pin is internally DC-biased
and should be DC blockedwith a capacitor suitablefor thefrequencyof
operation.
4HighLNAIN
High band LNA input. Themaximum VSWR is 2:1 (DCS/PCS RX band)
for both the gain and bypass mode. This pin is internally DC-biased
and should be DC blockedwith a capacitor suitablefor thefrequencyof
operation.
5HighLNA
GND
High band LNA ground connectio n. Immediate groundin g required
adjacent to pin.
See pin 4.
6HighLNA
VCC
High band LNA supply voltage. Local bypass capacitor required.
7HighLNA
OUT
High band LNA Output. Bias for the LNA is provided through this pin,
hence it should be connected to V
CC
through an inductor.
See pin 4.
8GND
Direct connection to ground.
9 IF OUT SEL
IF output select state control pin. This CMOS compatible signal controls the selection of the IF mixer output path (see the State Control
Truth Table). Local bypass capacitor required.
10 High MIX IN
High band RF mixer input. Although the base of the mixer input transistor is ACcoupled, this pin ser ves a dual purpose of providing a DC-bias
path via external inductor to GND. The typical input impedance is 8Ω
real and requires external matching to 50Ω.
11 NC
12 High LO IN
High band local oscillator input. This pin is internally AC-coupled and
matched to 50Ω.
See pin 19.
13 IF2-
IF output. Open collector output, requires external matching components and DC connection to V
CC
.
14 IF2+
IF output. Open collector output, requires external matching components and DC connection to V
CC
.
See pin 13.
15 MXR VCC
Mixer supply voltage. Local bypass capacitor required.
Low LNA GND
Low LNA OUT
Low LNA IN
High LNA GND
High LNA OUT
High LNA IN
High MIX IN
IF2+ IF2-
1pF
1pF1pF
Page 6
Preliminary
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RF2488
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FRONT-ENDS
RF2488 State Control Truth Table
Pin Function Description Interface Schematic
16 IF1-
IF output. Open collector output, requires external matching components and DC connection to V
CC
.
17 IF1+
IF output. Open collector output, requires external matching components and DC connection to V
CC
.
See pin 16.
18 BAND SEL
This CMOS compatible pin controls the selection of the low or high
band signal path (See the State Control Truth Table). Local bypass
capacitor required.
19 Low LO IN
LO band local oscillator input. This pin is AC-coupled and matched to
50Ω.
20 TX/RX
This CMOS compatible TX/RX mode select PowerControl Pin. CMOS
compatible signal controlling the functional state of the device (See the
State Control Truth Table). Local bypass capacitor required.
21 Low MIX IN
Low band RF mixer input. Although the base of the mixer input transistor is AC coupled, this pin serves a dual purpose of providing a DC bias
path via external inductor to GND. The typical input impedance is 8Ω
real and requires external matching to 50Ω.
22 VCC BIAS
Bias supply voltage. Local bypass capacitor required.
23 Low LNA
OUT
Low band LNA output. Bias for the LNA is provided through this pin,
hence it should be connected to VCC through and inductor.
See pin 3.
24 Low LNA
VCC
Low band LNA RF supply voltage. Local bypass capacitor required.
State TX/RX Band Sel IF Out Sel Active Circuits
0000LowBandLNA,IF1Mixer
1001LowBandLNA,IF2Mixer
2010HighBandLNA,IF1Mixer
3011HighBandLNA,IF2Mixer
4100AllOff
5101AllOff
6110AllOff
7111AllOff
IF1+ IF1-
1pF
1pF1pF
LO IN
500 Ω
Low MIX IN
Page 7
Preliminary
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RF2488
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FRONT-ENDS
Detailed Description
The RF2488 is fabricated on a high performance Silicon Germanium process that allows optimization of key RF parameters (including noise figure, gain and linearity) for very low current consumption. The RF2488 is packaged in a small 24pin, 4mm x4mm, leadless chip carrier. It can be operated on a single supply voltage from 2.7V to 3.3V. Toreduce power
consumption the RF2488 has a standby mode that draws less than 10uA.
The RF2488 has two frequency bands of operation. Each is c omprised of an LNA and two downconverting mixers with
combined RF inputs, and two separate intermediate frequency outputs. The LNA outputs and mixer RF inputs are typically connected through an image reject SAW filter, which provides image rejection and out-of-band blockingwith low inband insertion loss. Either of the two IF outputs can be selected whether operating in low band or high band mode. This
feature allows different IF frequencies and SAW filters to be used for different air interfaces in multi-mode phones. The
modes are selected using the external BAND SEL and IF SEL pins; these can be switched using standard CMOS logic
levels.
LNA
There are two LNA circuits: one for high band and one for low band. They have two gain conditions: high gain and low
gain. The gain state is selected using the external GAIN SEL pin that can be switched with standard CMOS logic levels.
The LNAs require a DC-blocking capacitor at the input and an inductor to ground; the inductor is used to provide additional input linearity and can be removed if the linearity is not required. The LNA output requires an output match, which
is determined by the input impedance of the IR SAW filter (typically 50Ω). The match must include an inductor to supply
to provide the LNA with a DC path to V
CC
.
In high gain mode, the low band LNA exhibits18dB of gain combined with a noise figure of <1.4dB and a input IP3 (IIP3)
of 3dB. In low gain mode, the device switches to a highly linear state, with IIP3 in excess of 20dBm and a gain of -9dB
with a current drain of less than 500uA.
In high gain mode, the high band LNA exhibits 17dB of gain combined with a noise figure of <1.7dB and a IIP3 of 2dB.
In low gain mode, the device switches to a highly linear state, with IIP3 in excessof 15dBm and a gain of -6dB with a current drain of less than 500uA.
Mixers
The mixers are all single-balanced mixers, with low noise figure, high linearity and high gain. The RF input match can be
tuned for a wide range of RF input frequencies. In low band mode, the match consists of an inductive choke to ground
and a 7Ω to 50Ω step up input match. In high band mode, the match consists of a resonant circuit that provides a DC
choketogroundanda7Ω to 50Ω step up input match.
The LO input port is internally matched to 50Ω and is internally DC-blocked for easy interface a cross a wide bandwidth.
The LO input can be dr iven with signals as low as -9dBm with no performance degradation. The matching of the IF outputs is discussed in the applications section.
Page 8
Preliminary
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FRONT-ENDS
Applicatio n Schematic
100 pF
GAIN SEL
12 nH
C1
L1 C2 L2 R1
C3
C18
1nF
MX VCC
100 pF
L1 C1
C2
L2 R1
C3
C19
1nF
100 pF
Band Select
2.2 nH
TX/RX
100 pF
100 pF
LNA1 VCC
15 nH
1.2 pF
Bias VCC
100 pF
33 nF
DNI
1920212223
1
5
4
3
2
6
987 1110
15
14
13
12
24
16
17
18
2.2 nH
100 pF
2.2 nH
56 nH
DNI
33 nF
10 nH
LNA2 VCC
10 pF
IF OUT
SELECT
100 pF
8.2 nH
5pF
4.7 nH
4.7 nH
3pF(HQ)
GND
GNDGND
GND
I/O I/O
Saw
Filters
LO1 IN
IF1 OUT
IF2 OUT
LO2 IN
GND
GNDGND
GND
I/O I/O
Saw
Filter
LNA2 IN
LNA1 IN
Page 9
Preliminary
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RF2488
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FRONT-ENDS
Application Information
Calculating the mixer output match
The evaluation boards mixer output match is explained below.
The match is made up of six components, each of which is discussed below.
Inductor L1
This inductor, along with capacitors C1 and C2 determine the resonant frequency of the current combining circuit, as well
as the output impedance at the resonant point. The output impedance will be dependent on the parasitic resistance of
the inductor R
P
. A high Q inductor will result in a high output impedance.
Inductor L2
This inductor functions as a choke at the IF frequency, and should be made as large as possible, to not interact with the
current combiner network. In addition, it provides a DC path from V
CC
to the mixer core transistors.
Capacitors C1 and C2
These capacitors should be equal, and along with L1, define the resonant frequency.
Capacitor C3
This capacitor is used to provide a DC-block.
Resistor R1
This is primarily used to set the output impedance of the network. The impedance at the resonant frequency can be
measured, and R1 can be placed in parallel to reduce the real impedance to the desired value. Alternatively, an approximation can be made using the following equation.
This is only an approximation, because it assumes the capacitors have infinite Q, and does not take into account PCB
parasitics.
The following equation can be used to approximately calculate the resonant frequency of the circuit.
IF+
IF-
L1
C1
C2
L2 R1
C3
IF OUT
V
CC
R
1
1
R
OUT
-------------
1
R
P
------
–
èø
æö
1–
=
f
IF
1
2
π
L1
2
------
C1 CEQ+()
-----------------------------------------------
=
Page 10
Preliminary
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FRONT-ENDS
Where CEQis the capacitance seen looking into IF+ and IF-, this is made up of an on-chip network that is used for high
frequency filtering and any on-chip and PCB stray capacitances.
The internal network is shown below.
IF+
IF-
1pF
1pF
1pF
Internal Circuitry
Page 11
Preliminary
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FRONT-ENDS
Evaluation Board Schematic
IF@135MHz
(Download Bill of Materials from www.rfmd.com.)
J4
LNA1 IN
J5
LNA2 IN
C4
100 pF
GAIN SEL
L4
12 nH
50 Ωµstrip
J8
LNA2OUT
50 Ωµstrip
J10
MX2 IN
C16
10 pF
L12
180 nH
C17
10 pF
L16
560 nH
R10
820 Ω
C21
1nF
50 Ωµstrip
J6
IF2 OUT
C18
1nF
MX VCC
C7
100 pF
L11
180 nH
C14
10 pF
C15
10 pF
L15
560 nHR9820 Ω
C20
1nF
C22
8pF
L13
180 nH
C19
1nF
50 Ωµstrip
J7
IF1 OUT
C6
100 pF
Band Select
L3
2.2 nH
50 Ωµstrip
J3
LO1 IN
TX/RX
C3
100 pF
C5
100 pF
LNA1 VCC
L1
15 nH
C1
1.2 pF
50 Ωµstrip
J1
LNA1OUT
Bias VCC
C2
100 pF
50 Ωµstrip
J2
MX1 IN
JP1
C27
1nF
C13
33 nF
C11*
DNI
2488400-
1920212223
1
5
4
3
2
6
987 1110
15
14
13
12
24
16
17
18
L5
2.2 nH
50 Ωµstrip
J9
LO2 IN
C24
100 pF
L10
2.2 nH
L8
56 nH
HEADER 8X2
16
13
15
14
10
1211
7
9
8
4
65
1
3
2
C28
1nF
C29
1nF
C30
1nF
C31
1nF
C32
1nF
C33
1nF
C34
1nF
C35
1nF
L9*
DNI
C12
33 nF
L17
10 nH
R5
0 Ω
R6*
0 Ω
LNA2 VCC
C8
10 pF
GND
GNDGND
GND
I/O I/O
FL2*
Saw Filter
R7*
0 Ω
IF OUT
SELECT
C9
100 pF
L7
8.2 nH
R8
0 Ω
L14
180 nH
C23
8pF
C10
5pF
L6
4.7 nH
L2
4.7 nH
R4
0 Ω
R1
0 Ω
R3*
0 Ω
R2*
0 Ω
GND
GNDGND
GND
I/O I/O
FL1*
Saw Filter
C26
1 µF
+
P1
CON2
1
2
GND
VCC
C25
3pF(HQ)
LNA1 VCC
LNA2 VCC
MX VCC
IF Out Select
Gain Select
Bias VCC
Band Select
TX/RX
R11
10 kΩ
R12
10 kΩ
R13
10 kΩ
R14
10 kΩ
NOTE: Parts with* after reference designator should not be populated on evaluationboard.
TRL
TRL
50 Ωµstrip
50 Ωµstrip
Page 12
Preliminary
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FRONT-ENDS
Evaluation Board Layout
Board Size 2.3” x 1.9”
Board Thickness 0.062”, Board Material FR-4, Multi-Layer
Assembly Top
Inner 1 Inner2
Page 13
Preliminary
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Back
Page 14
Preliminary
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FRONT-ENDS
LNA1 Gain versus Frequency
Gain Select=High,VCC=3 V
15.0
16.0
17.0
18.0
19.0
20.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA1 Gain versus Supply Voltage
Gain Select=High,880 MHz
15.0
16.0
17.0
18.0
19.0
20.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA1 Input IP3 versus Supply Voltage
GainSelect=High, 880/881 MHz, -25 dBm per tone
0.0
1.0
2.0
3.0
4.0
5.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
LNA1 Noise Figure versus Frequency
Gain Select=High,VCC=3 V
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency (MHz)
Noise Figure (dB)
+25°C Noise Figure
-40°CNoiseFigure
+85°C Noise Figure
LNA1 Noise Figure versusSupply Voltage
GainSelect=High, 880 MHz
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Noise Figure (dB)
+25°C Noise Figure
-40°C Noise Figure
+85°C Noise Figure
LNA1 Input IP3 versus Frequency
GainSelect=High, -25 dBm pertone,1 MHzSeparation,VCC=3 V
0.0
1.0
2.0
3.0
4.0
5.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency (MHz)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
Page 15
Preliminary
8-137
RF2488
Rev A0 010905
8
FRONT-ENDS
Mixer1Gain versus Frequency
VCC=3 V, LO PIN=-6 dBm
8.0
9.0
10.0
11.0
12.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
IF
OUT1
Gain (dB)
8.0
9.0
10.0
11.0
12.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
Mixer1Gain versus Supply Voltage
880 MHz, LO PIN=-6 dBm
8.0
9.0
10.0
11.0
12.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
Gain (dB)
8.0
9.0
10.0
11.0
12.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
Mixer1 Noise Figure versus Frequency
VCC=3 V, LO PIN=-6 dBm
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
IF
OUT1
Noise Figure (dB)
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
IF
OUT2
Noise Figure (dB)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
Mixer1Noise Figureversus Supply Voltage
880 MHz, LOPIN=-6 dBm
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
Noise Figure (dB)
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
IF
OUT2
Noise Figure (dB)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
Mixer1Input IP3 versus Frequency
-25dBm pertone,1 MHzSeparation,VCC=3 V, LO PIN=-6 dBm
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
IF
OUT1
IIP3 (dBm)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
Mixer1Input IP3 versus Supply Voltage
-25 dBm pertone,880/881 MHz, LOPIN=-6 dBm
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
IIP3 (dBm)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
Page 16
Preliminary
8-138
RF2488
Rev A0 010905
8
FRONT-ENDS
LNA2 Gain versus Frequency
Gain Select=High,VCC=3 V
13.0
14.0
15.0
16.0
17.0
18.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA2 Gain versus Supply Voltage
GainSelect=High, 1960 MHz
13.0
14.0
15.0
16.0
17.0
18.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA2 Noise Figure versus Frequency
Gain Select=High,VCC=3 V
0.0
0.5
1.0
1.5
2.0
2.5
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
Noise Figure (dB)
+25°C Noise Figure
-40°C Noise Figure
+85°C Noise Figure
LNA2 Noise Figure versusSupply Voltage
GainSelect=High, 1960 MHz
0.0
0.5
1.0
1.5
2.0
2.5
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Noise Figure (dB)
+25°C Noise Figure
-40°C Noise Figure
+85°C Noise Figure
LNA2 Input IP3 versus Frequency
GainSelect=High, -25 dBm pertone,1 MHzSeparation,VCC=3 V
0.0
1.0
2.0
3.0
4.0
5.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
LNA2 Input IP3 versus Supply Voltage
GainSelect=High, 1960/1961 MHz, -25 dBm per tone
0.0
1.0
2.0
3.0
4.0
5.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
Page 17
Preliminary
8-139
RF2488
Rev A0 010905
8
FRONT-ENDS
Mixer2Gain versus Frequency
VCC=3 V, LO PIN=-6 dBm
8.0
9.0
10.0
11.0
12.0
13.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
IF
OUT1
Gain (dB)
8.0
9.0
10.0
11.0
12.0
13.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
Mixer2Gain versus Supply Voltage
1960 MHz, LO PIN=-6 dBm
8.0
9.0
10.0
11.0
12.0
13.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
Gain (dB)
8.0
9.0
10.0
11.0
12.0
13.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
Mixer2 Noise Figure versus Frequency
VCC=3 V, LO PIN=-6 dBm
6.0
7.0
8.0
9.0
10.0
11.0
12.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
IF
OUT1
Noise Figure (dB)
6.0
7.0
8.0
9.0
10.0
11.0
12.0
IF
OUT2
Noise Figure (dB)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
Mixer2Noise Figureversus Supply Voltage
1960 MHz, LOPIN=-6 dBm
6.0
7.0
8.0
9.0
10.0
11.0
12.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
Noise Figure (dB)
6.0
7.0
8.0
9.0
10.0
11.0
12.0
IF
OUT2
Noise Figure (dB)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
Mixer2Input IP3 versus Frequency
-25dBm pertone,1 MHzSeparation,VCC=3 V, LO PIN=-6 dBm
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
IF
OUT1
IIP3 (dBm)
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
Mixer2Input IP3 versus Supply Voltage
-25 dBm pertone,1960/1961 MHz, LOPIN=-6 dBm
2.0
4.0
6.0
8.0
10.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
IIP3 (dBm)
2.0
4.0
6.0
8.0
10.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
Page 18
Preliminary
8-140
RF2488
Rev A0 010905
8
FRONT-ENDS
LNA1+Mixer1 Gainversus Frequency
Gain Select=High,VCC=3 V, LO PIN=-6dBm
23.0
24.0
25.0
26.0
27.0
28.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
IF
OUT1
Gain (dB)
23.0
24.0
25.0
26.0
27.0
28.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
LNA1+Mixer1 Input IP3 versus Frequency
Gain Select=High,-40 dBm per tone,1 MHz Separation,VCC=3 V,LO=-6 dBm
-17.0
-15.0
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
IF
OUT1
IIP3 (dBm)
-17.0
-15.0
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
LNA1+Mixer1 Gain versus Supply Voltage
Gain Select=High, 880 MHz, LO PIN=-6dBm
23.0
24.0
25.0
26.0
27.0
28.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
IF
OUT1
Gain (dB)
23.0
24.0
25.0
26.0
27.0
28.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
LNA1+Mixer1 Input IP3 versus Supply Voltage
G
ain Select=High, 880/881 MHz, -40dBm per tone, LO=-6 dBm
-16.0
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
IIP3 (dBm)
-16.0
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
LNA1+Mixer1 Noise Figure versus Frequency
Gain Select=High, VCC=3 V, LO PIN=-6 dBm
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency (MHz)
IF
OUT1
NF (dBm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
IF
OUT2
NF (dBm)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
LNA1+Mixer1 Noise Figure versus Supply Voltage
Gain Select=High,880 MHz, LO PIN=-6 dBm
0.0
0.5
1.0
1.5
2.0
2.5
3.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
Supply Voltage (V)
IF
OUT1
NF (dBm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
IF
OUT2
NF (dBm)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
Page 19
Preliminary
8-141
RF2488
Rev A0 010905
8
FRONT-ENDS
LNA2+Mixer2 Gainversus Frequency
Gain Select=High,VCC=3 V, LO PIN=-6dBm
20.0
22.0
24.0
26.0
28.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
IF
OUT1
Gain (dB)
20.0
22.0
24.0
26.0
28.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
LNA2+Mixer2 Gain versus Supply Voltage
Gain Select=High,1960 MHz, LO PIN=-6dBm
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
IF
OUT1
Gain (dB)
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
LNA1+Mixer1 Noise Figure versus LO Amplitude
GainSelect=High, 880 MHz, VCC=3 V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
LO Amplitude(dBm)
IF
OUT1
NF (dBm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
IF
OUT2
NF (dBm)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
LNA1+Mixer1 Current versus Supply Voltage
Gain Select=High,880 MHz, LO PIN=-6dBm
10.0
12.0
14.0
16.0
18.0
20.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
Current (mA)
+25°C Current
-40°C Current
+85°C Current
LNA1+Mixer1 Gain versus LO Amplitude
GainSelect=High, 880 MHz, VCC=3.0 V
23.0
24.0
25.0
26.0
27.0
28.0
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
LO Amplitude(dBm)
IF
OUT1
Gain (dB)
23.0
24.0
25.0
26.0
27.0
28.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
LNA1+Mixer1 Input IP3 versus LO Amplitude
Gain Select=High,880/881 MHz, -40 dBmper tone, VCC=3.0 V
-17.0
-15.0
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
LO Amplitude(dBm)
IF
OUT1
IIP3 (dBm)
-17.0
-15.0
-13.0
-11.0
-9.0
-7.0
-5.0
-3.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
Page 20
Preliminary
8-142
RF2488
Rev A0 010905
8
FRONT-ENDS
LNA2+Mixer2 Input IP3 versus Frequency
Gain Select=High,-40 dBm per tone,1 MHz Separation,VCC=3 V,LO=-6 dBm
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
IF
OUT1
IIP3 (dBm)
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
LNA2+Mixer2 Input IP3 versus Supply Voltage
Gain Select=High,1960/1961 MHz, -40 dBm per tone, LO=-6 dBm
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
IF
OUT1
IIP3 (dBm)
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
LNA2+Mixer2 Noise Figure versus Frequency
Gain Select=High,VCC=3 V, LO PIN=-6 dBm
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency (MHz)
IF
OUT1
NF (dBm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
IF
OUT2
NF (dBm)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
LNA2+Mixer2 Noise Figure versus Supply Voltage
Gain Select=High,1960 MHz, LO PIN=-6 dBm
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
Supply Voltage (V)
IF
OUT1
NF (dBm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
IF
OUT2
NF (dBm)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
LNA2+Mixer2 Noise Figure versus LO Amplitude
GainSelect=High, 1960 MHz, VCC=3 V
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
LO Amplitude(dBm)
IF
OUT1
NF (dBm)
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
IF
OUT2
NF (dBm)
+25°C NF, IFout1
-40°C NF, IFout1
+85°C NF, IFout1
+25°C NF, IFout2
-40°C NF, IFout2
+85°C NF, IFout2
LNA2+Mixer2 Gain versus LO Amplitude
GainSelect=High, 1960 MHz, VCC=3.0 V
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
LO Amplitude(dBm)
IF
OUT1
Gain (dB)
20.0
21.0
22.0
23.0
24.0
25.0
26.0
27.0
IF
OUT2
Gain (dB)
+25°C Gain, IFout1
-40°C Gain, IFout1
+85°C Gain, IFout1
+25°C Gain, IFout2
-40°C Gain, IFout2
+85°C Gain, IFout2
Page 21
Preliminary
8-143
RF2488
Rev A0 010905
8
FRONT-ENDS
LNA2+Mixer2 Input IP3 versus LO Amplitude
Gain Select=High,1960/1961 MHz, -40 dBm per tone, VCC=3.0 V
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
-2.0
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 1.0
LO Amplitude(dBm)
IF
OUT1
IIP3 (dBm)
-14.0
-12.0
-10.0
-8.0
-6.0
-4.0
-2.0
IF
OUT2
IIP3 (dBm)
+25°C IIP3, IFout1
-40°C IIP3, IFout1
+85°C IIP3, IFout1
+25°C IIP3, IFout2
-40°C IIP3, IFout2
+85°C IIP3, IFout2
LNA2+Mixer2 Current versus Supply Voltage
Gain Select=High,1960 MHz, LO PIN=-6dBm
12.0
14.0
16.0
18.0
20.0
22.0
24.0
26.0
28.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
Current (mA)
+25°C Current
-40°C Current
+85°C Current
Page 22
Preliminary
8-144
RF2488
Rev A0 010905
8
FRONT-ENDS
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