Page 1
ü
8-89
8
FRONT-ENDS
Preliminary
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 MESFETGaAs HBT
Si Bi-CMOS
SiGe
1
LNA VCC19
2GND
5LNA IN8
6
4
3LNA IN19
7GAIN SEL
14
TX L019
13
MXR IN8
12
MXR VCC19
11
GND
10
GND
9
LNA OUT
LNA VCC8
8
15 VCC TX19
16 VCC DOUBLER
GND
17
IF A
18
20 GND
19
IF B
21 LO IN8
VCC TX8
22
TX LO8
23
MXR IN19
2425
MXR VCC8
26
GND
2728
LNA OUT19
GND
GND
GND
X2
RF2475
DUAL-BAND LOW NOISE AMPLI F IER/MIXER
WITH FREQUENCY DOUBLER
• TDMA Handsets
The RF2475 includes two downconverting mixers and
associated LNAs. It is designed for IS136 handset applications in the cellular 800MHz and PCS 1900MHz
bands. Each LNA has a gain bypass mode, which is controlled by the gain select pin. The device internally ties the
two mixer outputs together, providing interface to a single
IF SAW filter. A frequency doubler is provided to supply
the LO signal to the PCS mixer and feeds the PCS transmit LO output buffer. A cellular LO output buffer is also
included. The device is fabricated usingGallium Arsenide
HBT technology and is packaged in a 28-pin, 5m mx5mm
leadless package.
• Complete Dual-Band Receiver Front-End
• Stepped LNA Gain Control
• Integrated LO Frequency Doubler
• Integrated LO Output Buffers
• Meets IS136 Specifications
RF2475 Dual-Band LowNoise Amplifier/Mixer with Fre-
quency Doubler
RF2475 PCBA Fully Assembled EvaluationBoard
8
Rev A2 010918
12°
MAX
1.00
0.85
0.65
0.30
4PLCS
0.50
0.23
0.13
4PLCS
5.00
sq.
2.50
Typ.
0.30
0.18
2
0.60
0.24
Typ
0.75
0.50
0.05
0.01
0.80
0.65
NOTES:
Shaded Pin is Lead 1.
1
Dimension applies to plated terminal: to be measured between 0.02 mm
and 0.25 mm fromterminal end.
2
Pin 1 identifier must exist on top surface of package by identification
mark or feature o n the package body. Exact shape and size is optional.
3
Package Warpage: 0.05 mm max.
4
Die Thickness Allowable: 0.305 mm max.
5
2.85
2.55
sq.
Package Style: LCC, 28-Pin, 5x5
Page 2
Preliminary
8-90
RF2475
Rev A2 010918
8
FRONT-ENDS
NOTES:
1 LNA input IP3 response to out of band frequencies (824Hz to 849MHz) should be -6dBm in high gain mode.
2 LO IN to LNA IN isolation specification with the 900MHz TX LO buffer on.
3 Image rejection measured with f
RF
=869MHz, PRF=-105dBm, fLO=1004MHz; P
IMAGE
=-85dBm, f
IMAGE
=1139MHz
Absolute Maximum Ratings
Parameter Rating Unit
Supply Voltage -0.5 to +5.0 V
DC
Input LO and RF Levels +6 dBm
Operating Ambient Temperature -30 to +85 °C
Storage Temperature -40 to +150 °C
Parameter
Specification
Unit Condition
Min. Typ. Max.
Cellular Receive Path
Operational Limits
RF Frequency 869 894 MHz
LO Frequency 950 1045 MHz
IF Frequency 100 150 MHz
LNA Input Level +10 dBm
LO Input Level -10 -7 -4 dBm
Supply Voltage 2.7 2.8 3.3 V
Cellular Cascaded
Electrical Specifications
T
AMB
=25°C, VCC=2.8V, fRF=881MHz,
f
LO
=1016MHz, fIF=135MHz,
LO Level=-7dBm, Image Filter I.L.=3dB
Gain 23 25 27 dB High Gain, Gain Select=High
8 dB Low Gain, Gain Select=Low
Gain Step 14 17 dB
Gain Variations versus Tempera-
ture
+
1.5 dB -30°C to +85°C
Noise Figure 2.2 2.6 dB High Gain, Gain Select=High
15 20 dB Low Gain, Gain Select=Low
Input Third Orde r Intercept
1
-10 -9 dBm High Gain, Gain Select=High
-2.0 -0.5 dBm Low Gain, Gain Select=Low
Return Loss 10 dB LNA Input - Exter nal Match
10 dB LNA Output - External Match
10 dB MixerRF Input - External Match
10 dB MixerLO Input - External Match
Isolation 60 dB
LO IN to LNA IN, Gain Select=High
2
60 dB LO IN to LNA IN, Gain Select=Low
60 dB
Image Rejection
3
50 dB LO IN to IF OUT
50 dB Mixer RF IN to IF OUT
35 dB MixerR F IN to TX LO OU T
IF Output Impedance >10 kΩ Mixer “ON”
SupplyCurrent 20 25 mA Not includingTX LO buffer
TX LO Buffer
LO Output Buffer -7 -4 dBm LO Input Level=-7dBm
Harmonic O utput -22 -25 dBc LO Input Level=-7dBm
Isolation - LO OUT to LO IN 25 dB TX LO Buffer ON
Supply Current 7.5 9.0 mA
Logic
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 TBD µA
Input Impedance TBD kΩ
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).
Page 3
Preliminary
8-91
RF2475
Rev A2 010918
8
FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
Cellular Receive Path,
Cont’d
Cellular Block Level
Electrical Specifications
Low Noise Amplifier
Frequency Range 869 894 MHz
Gain 20 dB High Gain, Gain Select=High
3 6 dB Low Gain, Gain Select=Low
Gain Step 14 17 dB
Gain Variations versus Tempera-
ture
+
1.0 dB -30°C to +85°C
Noise Figure 1.4 1.6 dB High Gain, Gain Select=High
dB Low Gain, Gain Select=Low
Input Third Order Intercept -3 0 dBm High Gain, Gain Select=High
-3 0 dBm Low Gain, Gain Select=Low
Terminating Impedance 50 Ω External Match
Supply Current 6 8 mA High Gain, Ga in Select=High
6 8 mA Low Gain, Gain Select=Low
Logic Input Low 0.5 V V
CC
=2.7Vto 2.9V
Logic Input High 2.0 V V
CC
=2.7Vto 2.9V
Mixer and LO Buffer
Frequency Range, Mixer Input 869 894 MHz
Frequency Range, IF Output 85 150 MHz
Frequency Range, LO Input 950 1045 MHz
Conversion Gain 7 8 9 dB
Noise Figure (SSB) 11 12 dB
Input Third Order Intercept 7 8 dBm
Terminating Impedance,
Mixer In, LO In, LO Out
50 Ω External Match
Terminating Impedance,
Mixer In, LO In, LO Out
Return Loss
10 Ω External Match
Terminating Impedance,
IF Out
>10 kΩ Mixer “ON”
Mixer Supply Current 14 19 mA
LO Input Level -10 -7 -4 dBm
LO Buffer Supply Current 7.5 9.0 mA
LO Output Level -7 -4 dBm
PCS Receive Path
Operational Limits
RF Frequency 1930 1990 MHz
Frequency Range, LO Input to
Doubler
1015 1039 1063 MHz LO input to device at LO IN8.
Frequency Range, Doubler Out-
put
2030 2078 2126 MHz Internal output of LO doubler driving the
mixer and TX LO buffer.
IF Frequency 100 150 MHz
LNA Input Level +10 dBm
LO Input Level -10 -7 -4 dBm
Supply Voltage 2.7 2.8 3.3 V
Page 4
Preliminary
8-92
RF2475
Rev A2 010918
8
FRONT-ENDS
NOTES:
4 LO IN to LNA IN isolation specification with the 1900MHz TX LO buffer on.
5 Image rejection measured with f
RF
= 1930MHz, PRF=-105dBm,fLO= 2065MHz; P
IMAGE
= -85dBm, f
IMAGE
= 2220MHz.
Image interferer should be suppressed 11dB below desired signal at the IF output.
6 2LO+
2RF Half IF Spur. (1/2 IF spurrelative to P
1/2RF)fRF
=1930MHz, PRF=-105dBm, fLO= 2065MHz;
F
1/2IF
=1997.5MHz, P
1/2IF
=-48dBm.
1/2 IF interferer should be suppressed 11dB below desired signal at the IF output.
Parameter
Specification
Unit Condition
Min. Typ. Max.
PCS Receive Path, Cont’d
PCS Cascaded
Electrical Specifications
T
AMB
=25°C, VCC=2.8V, fRF=1960MHz,
f
LO
=2095MHz, fIF=135MHz,
LO Level=-7dBm, Image Filter I.L.=3dB
Gain 24 26 28 dB High Gain, Gain Select=High
6 dB Low Gain, Gain Select=Low
Gain Step 17 20 dB
Gain Variations versus Tempera-
ture
+
1.5 dB -30°C to +85°C
Noise Figure 2.8 3.3 dB High Gain, Gain Select=High
15 20 dB Low Gain, Gain Select=Low
Input Third Order Intercept -12 -10 dBm High Gain, Gain Select=High
-2 -0.5 dBm Low Gain, Gain Select=Low
Return Loss 10 dB LNA Input - Exter nal Match
10 dB LNA Output - External Match
10 dB MixerRF Input - External Match
10 dB MixerLO Input - External Match
Isolation 40 dB
LO IN to LNA IN, Gain Select=High
4
40 dB LO IN to LNA IN, Gain Select=Low
35 37 dB
Image Rejection
5
>53 dB LO IN to IF OUT
>40 dB Mixer RF IN to IF OUT
35 dB MixerR F IN to TX LO OU T
Half IF S pur
6
-68 dBc
IF Output Impedance >10 kΩ Mixer “ON”
Supply Current 28 33 mA Including the LO doubler, but not the TX LO
buffer
TX LO Buffer
LO Doubler Outpu t Buffer -5 -3 dBm LO Input Level=-7dBm
Harmonic O utput -22 -25 dBc LO Input Level=-7dBm
Doubler Harmonic Output -45 -50 dBc Fundamental Suppression
Isolation - LO OUT to LO IN 35 dB TX LO Buffer ON
Supply Current 7.5 9.0 mA Including the LO doubler and the TX LO
buffer
Logic
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 TBD µA
Input Impedance TBD kΩ
Page 5
Preliminary
8-93
RF2475
Rev A2 010918
8
FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
PCS Receive Path, Cont’d
PCS Block Level
Electrical Specifications
Low Noise Amplifier
Frequency Range 1930 1990 MHz
Gain 22 dB High Gain, Gain Select=High
2 dB Low Gain, Gain Select=Low
Gain Step 16 20 dB
Gain Variations versus Tempera-
ture
+
1.0 dB -30°C to +85°C
Noise Figure 1.7 1.9 dB High Gain, Gain Select=High
dB Low Gain, Gain Select=Low
Input Third Order Intercept -7 -6 dBm High Gain, Gain Select=High
-2 0 dBm Low Gain, Gain Select=Low
Terminating Impedance 50 Ω
Supply Current 8 9 mA High Gain, Ga in Select=High
8 9 mA Low Gain, Gain Select=Low
Logic Input Low 0.5 V V
CC
=2.7Vto 2.9V
Logic Input High 2.0 V V
CC
=2.7Vto 2.9V
Mixer and LO Buffer
Frequency Range, Mixer Input 1930 1990 MHz
Frequency Range, IF Output 100 150 MHz
Frequency Range, LO Input to
Doubler
1015 1039 1063 MHz LO input to device at LO IN8.
Frequency Range, Doubler Out-
put
2030 2078 2126 MHz Internal output of LO doubler driving the
mixer and TX LO buffer.
Conversion Gain 7 8 9 dB
Noise Figure (SSB) 13 4 dB
Input Second Order Intercept 35 dBm
Input Third Order Intercept 7 8 dBm
Terminating Impedance,
Mixer In, LO In, LO Out
50 Ω External Match
Terminating Impedance,
Mixer In, LO In, LO Out
Return Loss
10 Ω External Match
Terminating Impedance,
IF Out
>10 kΩ Mixer “ON”
Mixer Supply Current 23 28 mA Including the LO doubler, but not the TX LO
buffer
LO Input Level -10 -7 -4 dBm
LO Buffer Supply Current 7.5 8.0 mA Including the LO doubler an d the TX LO
buffer
LO Output Level -5 -2 dBm
Page 6
Preliminary
8-94
RF2475
Rev A2 010918
8
FRONT-ENDS
NOTE:
The LO doubler is enabled by either MXR VCC19 (PCS RX mode) or TX LO19 (PCS TX mode). VCC DOUBLER is the
DC current return path for the output of the doubler. This should be connected to the PLL VCC or a supply that is on in
both the TX and RX modes of the 1900MHz band of operation. In the Cellular mode, the doubler is powered down to
savecurrent,even when VCC DOUBLER is energized.Therefore, the VCC DOUBLER pin can be connected to a supply
that is on in all modes, while minimizing the current consumption of the device.
Pin Function Description Interface Schematic
1LNAVCC19
PCS LNA supply voltage. Local bypass capacitor required.
2GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
3LNAIN19
PCS LNA input. AC-coupled. Requires external 50Ω matching components.
4GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
5LNAIN8
Cellular LNA input. AC-coupled. Requires extern al 50Ω matching components.
6GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
7 GAIN SEL
Gain select control input. Logic high=high gain, logic low=low gain.
8 LNA VCC8
Cellular LNA RF supply voltage. Local bypass capacitor required.
9LNAOUT
Cellular LNA output. AC-coupled. Requires matching to 50Ω.
10 GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
11 GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
12 MXR VCC19
PCS mixer and RX LO doubler enable supply voltage. Local bypass
capacitor required.
13 MXR IN8
Cellular RF mixerinput. AC-coupled. Requires matching to 50Ω.
14 TX LO19
PCS Transmit LO buffer output. Requires matching to 50Ω.
15 VCC TX19
PCS TX LO buffer and TX LO d oubler enable supply voltage. Local
bypass capacitor required.
16 VCC
DOUBLER
Doubler output supply voltage for PCS RX and PCS TX modes. See
Note 1.
17 GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
18 IF B
Mixer IF B output. Open collector out put, requires external matching
components and DC connection to VCC.
19 IF A
Mixer IF A output. Open collector out put, requires external matching
components and DC connection to VCC.
20 GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
21 LO IN8
Mixer LO input. AC-coup led. Requires matching to 50Ω.
22 VCC TX8
Cellular TX LO buffer supply voltage. Local bypass capacitor required.
23 TX LO8
Cellular TX LO buffer output. AC-coupled. Requires matching to 50Ω.
24 MXR IN19
PCS RF mixer input. AC-coupled. Requires matching to 50Ω.
25 MXR VCC8
Cellular mixer supply voltage. Local bypass capacitor required.
26 GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
27 GND
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
28 LNA OUT19
PCS LNA output. AC-coupled. Requires matching to 50Ω.
Pkg
Base
GND
Ground connection. The backside ofthe package should be soldered to
a top side ground pad which is connected to the ground plane with multiple vias. The pad should have a short thermal path to the ground
plane.
Page 7
Preliminary
8-95
RF2475
Rev A2 010918
8
FRONT-ENDS
Truth Table of Pin-by-Pin Biasing
Power Control Modes
NOTES:
There are separate RX/TX LO doublerswith a common output.
The DC return path for both the TX and RX doublers is via the PLL VCC which is on in all TX and RX modes.
This allows sharing of the LC load at the doubler output, which saves a significant amount of die area.
Pin # 1 28 8 9 121415 16 1819222325
Pin
Name
LNA
VCC19
LNA
OUT19
LNA
VCC8
LNA
OUT8
MXR
VCC19TXLO19
VCC
TX19
DOUBLER
VCC
IF B IF A VCC
TX8TXLO8
MXR
VCC8
Biased
by VCC
Supply
RX19
VCC
RX19
VCC
RX8
VCC
RX8
VCC
RX19
VCC
TX19
VCC
TX19
VCC
PLL
VCC
IF
VCCIFVCC
TX8
VCC
TX8
VCC
RX8
VCC
Mode
RX-800 LL
H HLLL H H HLLH
RX-1900
H HLLHLL H H HLLL
TX-800 LLLLLLL
HLLH HL
TX-1900 LLLLL
H H HLLLLL
L = Supply Off
H=
Supply On
Mode Pin Name Pin # Controls the Following Circuit Functions
RX19 LNA VCC19 1 1900MHz LNA Bias
MXR VCC19 12 Mixer RF Amplifier
Mixer LO Driver
RX LO Doubler
Doubler VCC 16 DC Return for the LO Doubler
IF B 18 DC Return for Mixer
IF A 19 DC Return for Mixer
RX8 LNA VCC8 8 800MHz LNA Bias
MXR VCC8 25 Mixer RF Amplifier
Mixer LO Driver
IF B 18 DC Return for Mixer
IF A 19 DC Return for Mixer
TX8 VCC TX8 22 800MHz TX LO Buffer
TX19 VCC TX19 15 1900MHz TX LO Buffer
TX LO Doubler
Doubler VCC 16 DC Return for the LO Doubler
Page 8
Preliminary
8-96
RF2475
Rev A2 010918
8
FRONT-ENDS
Pin Out
1
LNA VCC19
2GND
5LNA IN8
6
4
3LNA IN19
7GAIN SEL
14
TX L019
13
MXR IN8
12
MXR VCC19
11
GND
10
GND
9
LNA OUT
LNA VCC8
8
15 VCC TX19
16 VCC DOUBLER
GND
17
IF A
18
20 GND
19
IF B
21 LO IN8
VCC TX8
22
TX LO8
23
MXR IN19
2425
MXR VCC8
26
GND
2728
LNA OUT19
GND
GND
GND
Page 9
Preliminary
8-97
RF2475
Rev A2 010918
8
FRONT-ENDS
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
1
2
5
6
4
3
7
141312111098
15
16
17
18
20
19
21
22232425262728
X2
C23
10 pF
L1
8.2 nH
L14
10 nH
VCC LNA2
C21*
DNI
C1
1nF
2
1
4
3
6
5
R3*
DNI
C2
3pF
VCC MX1
FL2*
FAR-F6CE-
1G9600-L2XB
IN OUT
GND GND
GND GND
R1
0 Ω
C4
0.5 pF
L2
18 nH
R2
0 Ω
J1
LNA2 OUT
50 Ωµstrip
J2
MX2 IN
50 Ωµstrip
R5
300 ΩL37.5 nH
C5
3pF
VCC LO1
C7
100 pF
C6
4pF
J10
LO1 OUT
50 Ωµstrip
L4
4.7 nH
C36
3pF
J3
LO1 IN
50 Ωµstrip
C8*
DNI
C11
8pF
L6
56 nH
L5
56 nH
C9
3pF
VCC IF
C10
1nF
C24*
DNI
C22
1nF
R6*
DNI
C12
10 pF
L7
150 nH
J4
IF OUT
50 Ωµstrip
Part of Test Board
C13
3pF
VCC DBLR
C14
100 pF
+
R7
510 ΩL81.8 nH
C15
1.5 pF
VCC LO2
C16
1.5 pF
R4
0 Ω
J5
LO2 OUT
50 Ωµstrip
C18
3pF
VCC MX2
L11
12 nH
C20
100 pF
VCC LNA1
C19
1.2 pF
R11*
DNI
R10
0 Ω
J7
LNA1 OUT
50 Ωµstrip
R9*
DNI
R8
0 Ω
FL1*
FAR-F5CE-
881M50-K210
2
1
4
3
6
5
IN OUT
GND GND
GND GND
J6
MX1 IN
50 Ωµstrip
C17
3pF
L15
2.7 nH
L9
39 nH
GAIN SEL
TRL1
C38
33 nF
L12
3.9 nH
J8
LNA1 IN
50 Ωµstrip
C37
33 nF
L13
56 nH
C38
4pF
L12
3.9 nH
J9
LNA2 IN
50 Ωµstrip
2475400, Rev. -
GND
P2-2 GAINSEL
P2-3 GAIN
P2
1
2
3
CON3
GND
GND
P1-4 VCC
P1-1 VCC
P1
1
2
3
4
CON4
NOTES:
1. For best imagerejection, provide a common ground under the deviceconnecting pins10, 11, 26, and27.
2. There is a single gain selectpin forbothfrequencybands.
3. The image rejectSAWfilters are assumed to have a 3 dB insertion loss and 40 dB of image rejection.
4. Parts with "*" should not be populated on the evaluationboard.
C26
1nF
C25
1uF
+
C29
1nF
C35
1nF
C31
1nF
C33
1nF
Gain
VCC LNA2
VCC LNA1
VCC MX2
VCC LO2
VCC DBLR
VCC IF
VCC MX1
VCC LO1
VCC
C28
1nF
C30
1nF
C34
1nF
C32
1nF
JP1
HEADER 9X2
16
1817
13
15
14
10
1211
7
9
8
4
65
1
3
2
Part of TestBoard
C27
1nF
Page 10
Preliminary
8-98
RF2475
Rev A2 010918
8
FRONT-ENDS
Evaluation Board Layout
Board Size 2.6” x 2.0”
Board Thickness 0.058”, Board Material FR-4, Multi-Layer
Assembly Top
Page 11
Preliminary
8-99
RF2475
Rev A2 010918
8
FRONT-ENDS
Inner 1 Inner 2
Back
Page 12
Preliminary
8-100
RF2475
Rev A2 010918
8
FRONT-ENDS
LNA1 Gain versus Frequency
Gain Select=High, VCC=2.8 V
16.0
17.0
18.0
19.0
20.0
21.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
Gain (dB)
+25°C Gain
-40°CGain
+85°C Gain
LNA1 Gain versus Supply Voltage
Gain Select=High,882 MHz
16.0
17.0
18.0
19.0
20.0
21.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA1 Noise Figure versus Frequency
Gain Select=High, VCC=2.8 V
0.0
0.5
1.0
1.5
2.0
2.5
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency (MHz)
Noise Figure (dB)
LNA1 Input IP3 versus Frequency
GainSelect=High, -40 dBm pertone,1 MHzSeparation,VCC=2.8 V
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
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
LNA1 Input IP3 versusSupply Voltage
Gain Select=High,882/883MHz,-40dBm per tone
-3.0
-2.0
-1.0
0.0
1.0
2.0
2.62.72.82.9 3 3.13.23.33.4
Supply Voltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
LNA1 Noise Figure versus Supply Voltage
Gain Select=High,882 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)
Page 13
Preliminary
8-101
RF2475
Rev A2 010918
8
FRONT-ENDS
Mixer1 Gain versus Frequency
RX Mode, VCC=2.8 V, LO PIN=-7 dBm
4.0
5.0
6.0
7.0
8.0
9.0
10.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency(MHz)
Gain (dB)
+25°C Gain
-40°CGain
+85°C Gain
Mixer1Gain versus Supply Voltage
RX Mode, 882MHz, LO PIN=-7 dBm
5.0
6.0
7.0
8.0
9.0
10.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
Mixer1 SSB Noise Figure versus Frequency
RX Mode, VCC=2.8 V, LO PIN=-7 dBm
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)
SSB Noise Figure (dB)
Mixer1Input IP3 versus Frequency
RX Mode, -30 dBm per tone, 1 MHzSeparation, VCC=2.8 V, LO PIN=-7 dBm
4.0
5.0
6.0
7.0
8.0
9.0
10.0
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
Mixer1Input IP3 versus Supply Voltage
RX Mode, 882/883MHz,-30dBm per tone,LO PIN=-7 dBm
6.0
7.0
8.0
9.0
10.0
11.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
Mixer1SSB Noise Figure versus Supply Voltage
RX Mode, 882MHz, LO PIN=-7 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)
SSB Noise Figure (dB)
Page 14
Preliminary
8-102
RF2475
Rev A2 010918
8
FRONT-ENDS
LNA2 Gain versus Frequency
Gain Select=High, VCC=2.8 V
19.0
20.0
21.0
22.0
23.0
24.0
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
19.0
20.0
21.0
22.0
23.0
24.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA2 Noise Figure versus Frequency
Gain Select=High, VCC=2.8 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)
LNA2 Input IP3 versus Frequency
GainSelect=High, -40 dBm pertone,1 MHzSeparation,VCC=2.8 V
-8.0
-7.0
-6.0
-5.0
-4.0
-3.0
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, -40 dBm per tone
-10.0
-9.0
-8.0
-7.0
-6.0
-5.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
Supply Voltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
LNA2 Noise Figure versus Supply 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)
Page 15
Preliminary
8-103
RF2475
Rev A2 010918
8
FRONT-ENDS
Mixer2 Gain versus Frequency
RX Mode, VCC=2.8 V, LO PIN=-7 dBm
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)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
Mixer2Gain versus Supply Voltage
RX Mode, 1960MHz, LO PIN=-7 dBm
4.0
5.0
6.0
7.0
8.0
9.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
Mixer2 SSB Noise Figure versus Frequency
RX Mode, VCC=2.8 V, LO PIN=-7 dBm
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
SSB Noise Figure (dB)
Mixer2Input IP3 versus Frequency
RX Mode, -30 dBm per tone, 1 MHzSeparation, VCC=2.8 V, LO PIN=-7 dBm
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)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
Mixer2 Input IP3 versus Supply Voltage
RX Mode, 1960/1961 MHz,-30 dBm pertone, LO PIN=-7 dBm
6.0
7.0
8.0
9.0
10.0
11.0
12.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
Mixer2SSB Noise Figure versus Supply Voltage
RX Mode, 1960MHz, LO PIN=-7 dBm
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
2.62.72.82.93.03.13.23.33.4
SupplyVoltage (V)
SSB Noise Figure (dB)
Page 16
Preliminary
8-104
RF2475
Rev A2 010918
8
FRONT-ENDS
Mixer1 versus LO Amplitude
RX Mode, 882 MHz, VCC=2.8 V
4.0
5.0
6.0
7.0
8.0
9.0
10.0
-11.0 -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0
LO Amplitude(dBm)
Gain (dB), IIP3 (dBm)
9
10
11
12
13
14
15
SSB Noise Figure (dB)
Gain (dB)
IIP3 (dBm)
SSB NF (dB)
Mixer2 versus LO Amplitude
RX Mode, 1960MHz, VCC=2.8 V
4.0
5.0
6.0
7.0
8.0
9.0
10.0
-11.0 -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0
LO Amplitude(dBm)
Gain (dB), IIP3 (dBm)
11
12
13
14
15
16
17
SSB Noise Figure (dB)
Gain (dB)
IIP3 (dBm)
SSB NF (dB)
LNA1 + Mixer1 Gain versus Frequency
RX Mode, Gain Select=High,VCC=2.8 V, LO PIN=-7 dBm
20.0
22.0
24.0
26.0
28.0
30.0
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 + Mixer1 Input IP3 versusFrequency
RX Mode, Gain Select=High, 882/883 MHz, -40 dBm per tone, VCC=2.8V, LO P
IN
=
-7
dBm
-14.0
-13.0
-12.0
-11.0
-10.0
-9.0
-8.0
-7.0
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
LNA1+Mixer1 Gain versus Supply Voltage
RX Mode, GainSelect=High,882 MHz, LO PIN=-7 dBm
20.0
22.0
24.0
26.0
28.0
30.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA1 + Mixer1 SSB Noise Figure versus Frequency
RX Mode, GainSelect=High, VCC=2.8 V, LO PIN=-7 dBm
0.0
0.5
1.0
1.5
2.0
2.5
3.0
865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0
Frequency (MHz)
SSB Noise Figure (dB)
Page 17
Preliminary
8-105
RF2475
Rev A2 010918
8
FRONT-ENDS
LNA2 + Mixer2 Input IP3 versusFrequency
RX Mode, Gain Select=High, 1960/1961 MHz, -40 dBm per tone, VCC=2.8 V, LO PIN=-7 dBm
-16.0
-15.0
-14.0
-13.0
-12.0
-11.0
-10.0
-9.0
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
LNA1 + Mixer1 SSB Noise Figure versus Supply Voltage
RX Mode, GainSelect=High, VCC=2.8 V, LO PIN=-7 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
SupplyVoltage (V)
SSB Noise Figure (dB)
LNA1+Mixer1 Input IP3 versus Supply Voltage
RX Mode, GainSelect=High, 882/883 MHz, -40 dBm per tone,LOPIN=-7 dBm
-12.0
-11.0
-10.0
-9.0
-8.0
-7.0
-6.0
-5.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
Supply Voltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
LNA2+Mixer2 Gain versus Supply Voltage
RX Mode, GainSelect=High,1960 MHz, LO PIN=-7 dBm
20.0
22.0
24.0
26.0
28.0
30.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Gain (dB)
+25°C Gain
-40°C Gain
+85°C Gain
LNA2 + Mixer2 Gain versus Frequency
RX Mode, GainSelect=High, VCC=2.8 V, LO PIN=-7 dBm
20.0
22.0
24.0
26.0
28.0
30.0
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 + Mixer2SSB NoiseFigure versus Frequency
RX Mode, GainSelect=High, VCC=2.8 V, LO PIN=-7 dBm
0.0
1.0
2.0
3.0
4.0
1920.0 1930.0 1940.0 1950.0 1960.0 1970.0 1980.0 1990.0 2000.0
Frequency(MHz)
SSB Noise Figure (dB)
Page 18
Preliminary
8-106
RF2475
Rev A2 010918
8
FRONT-ENDS
LNA2 + Mixer2 SSB Noise Figure versus Supply Voltage
RX Mode, GainSelect=High, VCC=2.8 V, LO PIN=-7 dBm
0.0
1.0
2.0
3.0
4.0
2.6 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4
SupplyVoltage (V)
SSB Noise Figure (dB)
LNA2+Mixer2 IIP3 versus Supply Voltage
RX Mode, Gain Select=High, 1960/1961MHz, -40 dBmper tone, LO PIN=-7 dBm
-15.0
-14.0
-13.0
-12.0
-11.0
-10.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
Supply Voltage (V)
IIP3 (dBm)
+25°C IIP3
-40°C IIP3
+85°C IIP3
LNA1+Mixer1 Currentversus Supply Voltage
RX Mode, GainSelect=High,882 MHz, LO PIN=-7 dBm
15.0
20.0
25.0
30.0
35.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Current (mA)
+25°C Current
-40°C Current
+85°C Current
LNA2+Mixer2 Currentversus Supply Voltage
RX Mode, GainSelect=High,1960 MHz, LO PIN=-7 dBm
20.0
25.0
30.0
35.0
40.0
45.0
2.6 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4
SupplyVoltage (V)
Current (mA)
+25°C Current
-40°C Current
+85°C Current
LNA1 + Mixer1 versus LO Amplitude
RX Mode, GainSelect=High, 882 MHz, VCC=2.8 V
20.0
22.0
24.0
26.0
28.0
30.0
-11.0 -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0
LO Amplitude(dBm)
Gain (dB)
-13.0
-12.0
-11.0
-10.0
-9.0
-8.0
IIP3 (dBm)
Gain (dB)
IIP3(dBm)
LNA2 + Mixer2 versus LO Amplitude
RX Mode, GainSelect=High,1960 MHz, VCC=2.8 V
20.0
22.0
24.0
26.0
28.0
30.0
-11.0 -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0
LO Amplitude(dBm)
Gain (dB)
-16.0
-15.0
-14.0
-13.0
-12.0
-11.0
IIP3 (dBm)
Gain (dB)
IIP3 (dBm)
Page 19
Preliminary
8-107
RF2475
Rev A2 010918
8
FRONT-ENDS
LO Isolation
Low Band Cascaded Configuration, Supply Voltage=2.8V
-120.0
-100.0
-80.0
-60.0
-40.0
-20.0
0.0
500.0 600.0 700.0 800.0 900.0 1000.0 1100.0 1200.0 1300.0
Frequency(MHz)
Isolation (dB)
LO1-IFout
LO1-LN A1in
LO Isolation
High Band Cascaded Configuration, SupplyVoltage=2.8 V
-90.0
-80.0
-70.0
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
700.0 800.0 900.0 1000.0 1100.0 1200.0 1300.0
Frequency (MHz)
Isolation (dB)
LO1-IFout
LO1-LNA2in
LO Doubler Isolation
High Band Cascaded Configuration, SupplyVoltage=2.8 V
-100.0
-90.0
-80.0
-70.0
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
1500.0 1700.0 1900.0 2100.0 2300.0 2500.0
Frequency(MHz)
Isolation (dB)
LO1(X2)-IF out
LO1(X2)-LNA2in
Page 20
Preliminary
8-108
RF2475
Rev A2 010918
8
FRONT-ENDS
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