Page 1
ü
8-33
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 HBT
Si CMOS
VCC1
BAND SEL
IP SET
CELL MIXIN
GND
CELL LNA OUT
GND
CELLLNA EMITTER
CELLLNA IN
GND
PCS LNA IN
MIX GAIN
PCS MIX IN
GND
TX BUFF ENABLE
ENABLE
VCC3
/2 SELECT
CDMA-
CDMA+
FM-
FM+
ISET1
PCS LO OUT
LNA GAIN
GND
PCS LNA OUT
LO IN
ISET2
IF SEL
1
3
6
4
5
2
9 1410 1311 12
32 2731 2830 29
24
22
19
21
20
23
26 25
7
8
15 16
18
17CELL LO OUT
VCC2
/2
RF2489
DUAL-BAND/TRI-MODE CDMA
LOW NOISE AMPLIFIER/MIXER
• CDMA/Cellular/PCS Handsets
• JCDMA/GPS Handsets
• CDMA Modem/Data Cards
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
The RF2489 is a high performance CDMA dual-band/trimode integrated LNA/mixer. The device is designed to
meet all IS-98 sensitivity, intermodulation and single-tone
requirements. The o perating voltage is 2.7V and is compatible with 1.8V logic for control lines. The RF2489 integrates the dual-band LNA/downconverters with 30dB of
gain control and TX LO buffers. Additionally, a divide-by-2
prescaler to allow the use of a single-band VCO is integrated. The design is flexible, in that the bias currents
may be set using off-chip current reference resistors for
both the LNA and mixerblocks. The device is packaged in
a 5mmx5mm leadless plastic package.
• 30dB of Stepped LNA/Mixer Gain Control
• Adjustable Mixer & LNA Bias Current/IIP3
• A Divide-by-2 Prescaler
• Meets IMD Tests with Three Gain States/
Two Logic Control Lines
• Integrated TX LO Buffer Amplifiers
RF2489 Dual-Band/Tri-Mode CDMA Low Noise Amplifier/Mixer
RF2489 Dual-Band/Tri-Mode JCDMA/GPS Low Noise
Amplifier/Mixer
RF2489 PCBA Fully AssembledEvaluation Board
8
Rev A10 011017
1.00
0.85
5.00
sq.
NOTES:
Shaded Pin is Lead 1.
1
Package Warpage: 0.05 mm max.
4
Die Thickness Allowable:0.305 mm max.5
Pin 1 identifier must exist on top surfaceof package by identification
mark or feature on the packagebody.Exact shape and size is optional.
2
Dimensionapplies to plated terminal: to be measured between 0.02mm
and 0.25 mm from terminal end.
3
0.30
0.18
3
0.60
0.24 typ
0.55
0.30
0.50
0.23
0.13
4PLCS
0.05
0.01
0.80
0.65
3.25
2.95 sq.
12°
MAX
0.45
0.20
4PLCS
Package Style: LCC, 32-Pin, 5x5
Page 2
Preliminary
8-34
RF2489
Rev A10 011017
8
FRONT-ENDS
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 -40 to +85 °C
Storage Temperature -40 to +150 °C
Parameter
Specification
Unit Condition
Min. Typ. Max.
Overall
T= 25°C, VCC=2.75V
RF Frequency Range 869 to 894 MHz
1930 to 1990 MHz
1575.42 MHz GPS
IF Frequency Range 0.1 to 400 MHz
Cellular Band
JCDMA Band
Freq=869MHz to 894MHz
Freq=832MHz to 870MHz
LNA (On)
LNA 50Ω match
Gain 13.5 15.0 16.0 dB IP SET=1
13.0 14.0 dB IP SET=0
Noise Figure 1.1 1.3 dB IP SET=1
1.1 1.3 dB IP SET=0
Input IP3 +9.0 +10.0 dBm IP SET= 1
+6.0 +8.5 dBm IP SET=0
Current 6.5 mA IPSET=1
4.5 mA IPSET=0
Isolation 23 dB
LNA (Off)
Gain -6 -5 dB
Noise Figure 5.0 5.5 dB
Input IP3 +23.0 +25.0 dBm
Current 0 mA
Isolation 5 dB
Mixer - CDMA/JCDMA
LO Input Level=-4dBm
Gain 12.0 13.5 15 dB Mixer Preamp ON
2 4 dB Mixer Preamp OFF
Noise Figure 7 8 dB Mixer Preamp ON
14 16 dB Mixer Preamp OFF
Input IP3 +3.0 +4.5 dBm Mixer Preamp ON
+12.0 +14.0 dBm Mixer Preamp OFF
Current 19.5 mA MixerPreamp ON/Mixer/LO Input Amps
15.0 mA Mixer Preamp OFF/Mixer/LO Input Amps
LO to RF Isolation 36 dB Mixer Preamp ON
30 dB Mi xer Preamp OFF
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
8-35
RF2489
Rev A10 011017
8
FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
Cellular Band
JCDMA Band, cont’d
Freq=869MHz to 894MHz
Freq=832MHz to 870MHz
Mixer - FM
LO Input Level=-4dBm
Gain 12 13 14 dB Mixer Preamp ON
2 4 dB Mixer Preamp OFF
Noise Figure 7 8 dB Mixer Preamp ON
14 16 dB Mixer Preamp OFF
Input IP3 +3.0 +5.0 dBm Mixer Preamp ON
+130 +15.0 dBm Mixer Preamp OFF
Current 19.5 mA MixerPreamp ON/Mixer/LO InputAmps
15.0 mA Mixer Preamp OFF/Mixer/LO Input Amps
LO to RF Isolation 36 dB M ixer Preamp ON
30 dB Mixer Preamp OFF
Other
LO-IF Isolation 30 dB
RF-IF Isolation 40 dB
LNA Out to Mixer In Isolation 40 50 dB
LO-LNA In Isolation, Any State 35 dB
PCS Band
Freq=1930MHz to 1990MHz
Freq=1840MHz to 1870MHz
LNA (On)
LNA 50Ω match
Gain 14.5 16.0 dB IP SET=1
14.5 15.0 dB IP SET=0
Noise Figure 1.4 1.6 dB IP SET=1
1.3 1.6 dB IP SET=0
Input IP3 +6.0 +8.0 dBm IP SET=1
-1.0 +1.0 dBm IP SET=0
Current 6.5 mA IP SET=1
4.5 mA IP SET=0
Isolation 20 dB
LNA (Off)
Gain -6.5 -5.5 dB
Noise Figure 5 6 dB
Input IP3 +23.0 +26.0 dBm
Current 0 mA
Isolation 5 dB
Mixer
LO Input Level=-4dBm
Gain 11.5 13.0 14.0 dB Mixer Preamp ON
2.5 4.0 dB Mixer Preamp OFF
Noise Figure 8.0 9.5 dB Mixer Preamp ON
15 dB Mixer Pre amp OFF
Input IP3 +2.0 +4.0 dBm Mixer Preamp ON
+11.0 +13.0 dBm Mixer Preamp OFF
Current 19.5 mA MixerPreamp ON/Mixer/LO InputAmps
15.0 mA Mixer Preamp OFF/Mixer/LO Input Amps
LO to RF Isolation 36 dB M ixer Preamp ON
30 dB Mixer Preamp OFF
Other
LO-IF Isolation 36 dB
RF-IF Isolation 40 dB
LNA Out to Mixer In Isolation 30 40 dB
LO-LNA In Isolation, Any State 35 dB
Page 4
Preliminary
8-36
RF2489
Rev A10 011017
8
FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
GPS Frequency
Freq=1575.42MHz
LNA (On)
LNA 50Ω match
Gain 16.5 18.0 dB IP SET=1
15.5 16.5 dB IP SET=0
Noise Figure 1.4 1.6 dB IP SET=1
1.3 1.6 dB IP SET=0
Input IP3 -6.0 -5.0 dBm IP SET=1
-11.0 -9.0 dBm IP SET=0
Current mA IP SET=1
mA IP SET=0
Isolation 20 dB
Mixer
Mixer RF amp ON
LO Input Level=-4dBm
Gain 15 16 17 dB
Noise Figure 7 9 dB
Input IP3 +1.0 +1.5 dBm
Current mA
LO to RF Isolation 36 dB
Other
LO-IF Isolation 36 dB
RF-IF Isolation 40 dB
LNA Out to Mixer In Isolation 30 40 dB
LO-LNA In Isolation, Any State 35 dB
Control Lines
Input Capacitance 1 pF BAND SEL, IF SEL, IP SET, LNA GAIN,
ENABLE, MIX GAIN, TX BUFF ENABLE,
/2 SELECT
Page 5
Preliminary
8-37
RF2489
Rev A10 011017
8
FRONT-ENDS
Parameter
Specification
Unit Condition
Min. Typ. Max.
Local Oscillator Input
Cellular - CDMA/FM
Input Power -10 -4 0 dBm
Input Frequency 685-710 MHz IF=184MHz
1053-1078 MHz IF=184MHz
1370-1420 MHz IF=184MHz with /2 SELECT=1
2106-2156 MHz IF=184MHz with /2 SELECT=1
Cellular - JCDMA
Input Power -10 -4 0 dBm
Input Frequency 722-760 MHz IF=110MHz
942-980 MHz IF=110MHz
1444-1520 MHz IF=110MHz with /2 SELECT=1
1884-1960 MHz IF=110MHz with /2 SELECT=1
PCS
Input Power -10 -4 0 dBm
Input Frequency 1746-1806 MHz IF=184MHz
2114-2174 MHz IF=184MHz
GPS
Input Power -10 -4 0 dBm
Input Frequency 1465.42 MHz IF=110MHz
1685.42 MHz IF =110MHz
TX (Local Oscillator)
Buffer
Cellular - CDMA/FM
Output Power -10 -8 dBm Single-ended 50Ω load, /2 SELECT =1
Output Frequency 685-710 MHz IF=184MHz
1053-1078 MHz IF=184MHz
1370-1420 MHz IF=184MHz with /2 SELECT=1
2106-2156 MHz IF=184MHz with /2 SELECT=1
Current Consumption 2 mA
Cellular - JCDMA
Output Power -10 -8 dBm Single-ended 50Ω load, /2 SELECT =1
Output Frequency 722-760 MHz IF=110MHz
942-980 MHz IF=110MHz
1444-1520 MHz IF=110MHz with /2 SELECT=1
1884-1960 MHz IF=110MHz with /2 SELECT=1
Current Consumption 2 mA
PCS
Output Power -10 -8 dBm Single-ended 50Ω load
Output Frequency 1746-1806 MHz IF=184MHz
2114-2174 MHz IF=184MHz
Current Consumption 2 mA
Page 6
Preliminary
8-38
RF2489
Rev A10 011017
8
FRONT-ENDS
Evaluation Board Current Measureme nt
NOTES:
All IDC current numbers include bias circuitry current of 3.5mA (dependent on mode).
TX Buffer On: Add 2mA to total current.
/2 Select On: Add 2mA to total current.
“X” denotes setting does not impact current.
BAND
SELIFSEL ENABLE
LNA
GAIN
MIX
GAINIPSET
TX BUFF
ENABLE/2SELECT
IDC
(mA)
CDMA Cellular
JCDMA
LNA On, Mixer Preamp On,
TX Buffer Off, /2 Off
00 1 1 10 0 027.5
LNA On, Mixer P reamp Off,
TX Buffer Off, /2 Off
00 1 1 00 0 023.0
LNA Bypassed, Mixer Preamp On,
TX Buffer Off, /2 Off
00 1 0 10 0 023.0
LNA Bypassed, Mixer Preamp Off,
TX Buffer Off, /2 Off
00 1 0 00 0 018.5
FM
LNA On, Mixer Preamp On,
TX Buffer Off, /2 Off
01 1 1 10 0 027.5
LNA On, Mixer P reamp Off,
TX Buffer Off, /2 Off
01 1 1 00 0 023.0
LNA Bypassed, Mixer Preamp On,
TX Buffer Off, /2 Off
01 1 0 10 0 023.0
LNA Bypassed, Mixer Preamp Off,
TX Buffer Off, /2 Off
01 1 0 00 0 018.5
CDMA PCS - High IIP3 LNA Mode
LNA On, Mixer Preamp On,
TX Buffer Off, /2 Off
10 1 1 11 0 029.5
LNA Off, Mixer Preamp Off,
TX Buffer Off, /2 Off
10 1 1 01 0 025.0
LNA Bypassed, Mixer Preamp On,
TX Buffer Off, /2 Off
10 1 0 11 0 023.0
LNA Bypassed, Mixer Preamp Off,
TX Buffer Off, /2 Off
10 1 0 01 0 018.5
GPS
LNA On, Mixer On
Page 7
Preliminary
8-39
RF2489
Rev A10 011017
8
FRONT-ENDS
Cascaded Performance (Typical Values for VCC=2.75V)
NOTE: All total current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode).
Parameter CELLCDMA
LNA ON LNA OFF LNA ON LNA OFF
Mixer Preamp On Mixer Preamp Off
Cascaded:
Gain (dB) 24.5 5.5 15.0 -4.0
Noise Figure ( dB) 2.2 15.0 5.1 22.0
Input IP3 (dBm) -6.6 +12.3 +1.9 +19.5
LO to IF Isolation (dB) 30 30 30 30
IF1 to RF Isolation (dB) 40 40 40 40
IF2 to RF Isolation (dB) 40 40 40 40
LO to LNA IN Isolation (dB) 40 40 40 40
Total C urrent (mA) 27.5 23.0 23.0 18.5
NOTE: Assumes 3dB image filter insertion loss. The TX Buffer Enable is off. Div/2 function is off.
Numbers represent low current L NA bias setting IPSET=0.
Parameter FM
LNA ON LNA OFF LNA ON LNA OFF
Mixer Preamp On Mixer Preamp Off
Cascaded:
Gain (dB) 24.0 5.0 15.0 -4.0
Noise Figure ( dB) 2.2 15.0 5.1 22.0
Input IP3 (dBm) -6.1 +12.7 +2.7 +20.8
LO to IF Isolation (dB) 30 30 30 30
IF1 to RF Isolation (dB) 40 40 40 40
IF2 to RF Isolation (dB) 40 40 40 40
LO to LNA IN Isolation (dB) 40 40 40 40
Total C urrent (mA) 27.5 23.0 23.0 18.5
NOTE: Assumes 3dB image filter insertion loss. The TX Buffer Enable is off. Div/2 function is off.
Numbers represent low current L NA bias setting IPSET=0.
Parameter PCS CDMA
LNA ON LNA OFF
LNA at Max IIP3, IPSET= 1 LNA at Min IIP3, IPSET=0
Mixer Amp ON Mixer Amp OFF Mixer Amp ON Mixer Amp OFF Mixer Amp ON Mixer Amp OFF
Cascaded:
Gain(dB) 26.017.025.015.5 5.0 -4.0
Noise Figure ( dB) 2.2 4.7 2.3 5.2 16.0 23.0
Input IP3 (dBm) -9.0 -0.6 -8.5 -2.0 +11.8 +19.8
LOtoIFIsolation(dB)303030303030
IF1 to RF Isolation (dB) 40 40 40 40 40 40
IF2 to RF Isolation (dB) 40 40 40 40 40 40
LO to LNA IN Isolation (dB) 40 40 40 40 40 40
TotalCurrent(mA) 29.525.027.523.023.018.5
NOTE: Assumes 3dB image filter insertion loss. The TX Buffer Enable is off. Div/2 function is off.
Parameter GPS
Cascaded:
Gain (dB) 34.5
Noise Figure (dB) 1.6
Input IP3 (dBm) -19
Total Current (mA) 21
NOTE: Assumes 1.5dB image filter insertion loss.
The TX Buffer Enable is off. /2 Select is off.
Page 8
Preliminary
8-40
RF2489
Rev A10 011017
8
FRONT-ENDS
Control Logic (Single VCO)
Control Logic (Dual VCO)
Application Note 1
The PCS TX LO output pin (pin 7) and the CELL TX LO output pin (pin 8) can be combined. When BAND SEL is set low,
the PCS band LO limiter and PCS TX LO buffer are off. Also, when BAND SEL is set high, the cellular band LO limiter
and frequency divider are off as well as the c ellular TX LO buffer. The LO leakage through the path of the disabled LO
limiter/divider and TX LO buffer is insignificant.
Typical L O isolation test data follows:
LO Input Frequency=2128MHz, P
IN
=-4dBm, BAND SEL=0, /2 SELECT=1
P
OUTPIN8
=-28dBm at 2128MHz
P
OUTPIN8
=-11dBm at 1064MHz
P
OUTPIN7
=-34dBm at 2128MHz
Mode BAND SEL IF SEL ENABLE
TX BUFF
ENABLE
/2 SELECT
Cellular FM 0 1 1 X 1
CellularCDMA 0 0 1 X 1
PCS CDMA 1 0 1 X X
Power Down 1 1 1 X X
Power Down 2 X X 0 X X
TX Buffer Enabled X X 1 1 X
/2 Enabled 0 X 1 X 1
Mode BAND SEL IF SEL ENABLE
TX BUFF
ENABLE
/2 SELECT
Cellular FM 0 1 1 X 0
CellularCDMA 0 0 1 X 0
PCS CDMA 1 0 1 X X
Power Down 1 1 1 X X
Power Down 2 X X 0 X X
TX Buffer Enabled X X 1 1 X
/2 Enabled 0 X 1 X 1
Page 9
Preliminary
8-41
RF2489
Rev A10 011017
8
FRONT-ENDS
Pin Function Description Interface Schematic
1FM+
FM IF output. Open collector. “Current combiner” IF interface to SAW
filter recommended.
2FM-
FM IF output. Open collector. “Current combiner” IF interface to SAW
filter recommended.
See pin 1.
3 CDMA+
CDMA IF output. Open collector.
4 CDMA-
CDMA IF output. Open collector. See pin 3.
5 /2 SELECT
Enable /2 circuitry in cellular mode. High enables /2 circuitry.
The divider is disabled when BAND SEL (pin 30) is high, regardless of
the state of pin 5. The divider can only be enabled when BAND SEL is
low and pin 5 is high. Pin 5 can be tied to a high state allowing BAND
SEL (pin 30) to control the LO divider function, if using a single LO
input source.
6LOIN
LO single-end input. Internal DC block.
7PCSLO
OUT
PCS LO output. Internal DC block. If a single TX VCO is required, pins
7 and 8 can be tied together and used as one LO output. (See application note 1.)
8CELLLO
OUT
Cellular LO output. Internal DC block. (See application note 1.)
9VCC3
VCC connection for internal LO amplifiers. Internal RF bypass capacitor. External bypass capac itor between 1nF and 47nF required.
10 ENABLE
Logic input. Low level powers down IC.
IC can be shut down by setting pins 30 and 32 high and TX Buffer
Enable low as well.
11 TX BUFFER
ENABLE
Logic input. High enables TX LO buffer amplifiers.
12 GND
Low-inductance ground required.
13 PCS MIX IN
PCS mixer RF single-end input.
14 MIX GAIN
Logic input. Logic high turns on PCS or cellular mixer preamp and
mixer provides maximum gain. Logic low will bypass the PCS and cellular mixer preamp.
15 LNA GAIN
Logic input. High activates CDMA or PCS LNAs. Low selects LNA
bypass mode for both bands.
FM+ FM-
CDMA+ CDMA-
LO IN
ENABLE
TX BUF
PCS MIX IN
MIX GAIN
LNA GAIN
Page 10
Preliminary
8-42
RF2489
Rev A10 011017
8
FRONT-ENDS
Pin Function Description Interface Schematic
16 GND
Low-inductance ground r equired.
17 PCS LNA
OUT
PCS LNA output. Small external inductance required for best impedance match to 50Ω.
18 VCC2
PCS LNA VCC connection. A series inductance required for matching.
19 GND
Low-inductance ground r equired.
20 PCS LNA IN
PCS LNA input. Simple external matching required fo r best performance.
See pin 17.
21 GND
Low-inductance ground r equired.
22 CELL LNA
IN
Cellular LNA input. Simple external matching required for best performance.
23 CELL LNA
EMITTER
Cellular LNA emitter. A small inductor connects this pin to ground. Cellular LNA gain can be adjusted by the inductance.
See pin 22.
24 CELL LNA
OUT
Cellular LNA output. Simple external L-C matching required. See pin 22.
25 ISET1
Resistor to ground sets both LNA andmixercurrents.Lower resistance
results in lower currents for both the LNA and mixer.
26 ISET2
Resistor to ground sets LNA current. Higher resistance results in lower
current.
27 GND
Low-inductance ground r equired.
28 CELL MIX
IN
Cellular mixer RF single-end input. External L-C network required for
best performance.
29 VCC1
VCC for internal references, logic, and mixer preamplifiers. Internal RF
bypass capacitor. External bypass capacitor between 1nF and 47nF
required.
30 BAND SEL
Logic input. High level selects PCS band; low level selects cellular
band. The LO divider circuitry is disabled when BAND SEL is high,
regardless of the state of pin 5 (/2 SELECT). When BAND SEL is low,
pin 5 can be selected high or low. If using a single LO input, pin 5 can
be tied to a high state allowing BAND SEL to control the LO divider
function.
31 IP SET
Logic input. High selects external LNA current reference set by the
resistor connected from ISET2 to ground.
32 IF SEL
Logic input. High selects FM IF outputs; low selects CDMA IF outputs.
PCS LNA IN
V
CC
PCS LNA OUT
CELL LNA IN
V
CC
CELL LNA OUT
CELL LNA EMITTER
CELL MIX IN
BAND SEL
IP SET
IF SEL
Page 11
Preliminary
8-43
RF2489
Rev A10 011017
8
FRONT-ENDS
Application Schematic
1
3
6
4
5
2
9 1410 1311 12
32 2731 2830 29
24
22
19
21
20
23
26 25
7
8
15 16
18
17
/2
/2 SELECT
33 nF
1pF
68 Ω
2nH
2nH
VCC
TX BUFF ENABLE
BUF ENABLE
1nH
DNI
47 nH
33 nF
DNI
INOUT
GNDGND
GNDGND
F1
25
1
4
3
6
LNA GAIN
MIX GAIN
7.5 nH
15 nH
VCC
33 nF
1.5 nH
47 nH
33 nF
8.7 nH
VCC
DNI
F2
25
1
4
3
6
GNDGND
GNDGND
IN OUT
20 kΩ 5.1kΩ
47 nH
33 nF
DNI
IF SEL
IP SET
BAND SEL
33 nF
VCC
RL1
C1
L2
0 Ω
C2
DNI
VCC
C1
RL1
C1
C1
L2
VCC
0 Ω
C2
DNI
CDMA
IF OUT
FM IF OUT
LO IN
HB LO OUT
LB LO OUT
LNA H IN
LNA L IN
0 Ω
7.5 nH
0.5 pF
Output Interface Network
L1, C1, and R form a current combiner which performs a differential to single-ended conversion at the
IF frequency and sets the output impedance. In most
cases, the resonance frequency is independent of R
and can be set according to the following equation:
Where C
EQ
is the equivalent stray capacitance and
capacitance looking into pins 1 and 2. An average
value to use for C
EQ
is 2.5pF to 3pF.
R can then be used to set the output impedance
according to the following equation:
where R
OUT
is the desired output impedance and R
P
is the parasitic equivalent parallel resistance of L1.
C1 should be chosen as high as possible (not greater
than 22pF), while maintaining an R
P
of L1 that allows
for the desired R
OUT
.
L2 and C2 serve dual purposes. L2 serves as an output bias choke,and C2 serves as a series DC block.
In addition, L2 and C2 may be chosen to form an
impedance matching network if the input impedance
of the IF filter is not equal to ROUT. Otherwise, L2 is
chosen to be large, and C2 is chosen to be large if a
DC path to ground is present in the IF filter, or omitted
if the filter is DC blocked.
1
2
π
L1
2
(C1+CEQ)
fIF=
R=
1
4R
OUT
-
1
R
P
()
-1
Page 12
Preliminary
8-44
RF2489
Rev A10 011017
8
FRONT-ENDS
Evaluation Board Schema t ic
IF@184MHz
(Download Bill of Materials from www.rfmd.com.)
1
3
6
4
5
2
9 1410 1311 12
32 2731 2830 29
24
22
19
21
20
23
26 25
7
8
15 16
18
17
/2
C30
33 nF
/2 SELECT
C17
33 nF
L12
7.5 nH
C18
1pF
50 Ωµstrip
J8
LNA H IN
R8
68 Ω
50 Ωµstrip
J4
HB LO OUT
L13
2nH
50 Ωµstrip
J3
LO IN
J5
LB LO OUT
L14
2nH
50 Ωµstrip
VCC
C7
33 nF
C8
33 nF
ENABLE
C9
33 nF
TX BUFF ENABLE
L6
1nH
C15
DNI
L5
47 nH
C10
33 nF
C11
33 nF
50 Ωµstrip
J6
MIX H IN
C12
DNI
INOUT
GNDGND
GNDGND
F1
25
1
4
3
6
C14
33 nF
LNA GAIN
C13
33 nF
MIX GAIN
L7
7.5 nH
L15
15 nH
C16
33 nF
50 Ωµstrip
J7
L
NA H OUT
C31
0.5 pF
VCC
C19
33 nF
50 Ωµstrip
J9
LNA L IN
L16
1.5 nH
L9
47 nH
C20
33 nF
L10
10 nH
VCC
C21
1.8 pF
C22
DNI
50 Ωµstrip
J10
LNA L OUT
F2
25
1
4
3
6
GNDGND
GNDGND
IN OUT
R10
20 kΩ
R9
5.1 kΩ
L11
47 nH
C23
33 nF
C24
DNI
C25
33 nF
50 Ωµstrip
J11
MIX L IN
IF SEL
C29
33 nF
C28
33 nF
IP SET
C27
33 nF
BAND SEL
C26
33 nF
VCC
R4
10 kΩ
L3
120 nH
C5
6.8 pF
L4
270 nH
R5
0 Ω
C6
7pF
R6
DNI
50 Ωµstrip
J2
CDMA IF OUT
VCC
C4
6.8 pF
2489310Rev. 1
R1
10 kΩ
L2
120 nH
C3
6.8 pF
C1
6.8 pF
L1
270 nH
VCC
R2
0 Ω
C2
7pF
R3
DNI
50 Ωµstrip
J1
FM IF OUT
P1-1 /2 SELECT
P1-4 BAND SEL
P1-2 IF SEL
P1-3 IP SET
P1
1
2
3
4
CON4
P3
1
2
3
CON3
C32
1 µF
+
GND
GND
P3-1 VCC
R12
0 Ω
R11
0 Ω
P2
1
2
3
4
CON4
P2-1 ENABLE
P2-3 MIX GAIN
P2-4 LNA GAIN
P2-2
TX BUFF ENABLE
Page 13
Preliminary
8-45
RF2489
Rev A10 011017
8
FRONT-ENDS
Evaluation Board Schematic
JCDMA/GPS
IF@110MHz
1
3
6
4
5
2
9 1410 1311 12
32 2731 2830 29
24
22
19
21
20
23
26 25
7
8
15 16
18
17
/2
C30
33 nF
/2 SELECT
C17
3pF
L12
5.1 nH
50 Ωµstrip
J8
LNA H IN
R8
68 Ω
50 Ωµstrip
J4
HB LO OUT
L13
2nH
50 Ωµstrip
J3
LO IN
J5
LB LO OUT
L14
6.2 nH
50 Ωµstrip
VCC
C7
33 nF
C8
33 nF
ENABLE
C9
33 nF
TX BUFF ENABLE
L6
3.9 nH
C15
DNI
L5
47 nH
C10
33 nF
C11
33 nF
50 Ωµstrip
J6
MIX H IN
C12
DNI
INOUT
GNDGND
GNDGND
F1
25
1
4
3
6
C14
33 nF
LNA GAIN
C13
33 nF
MIX GAIN
L7
10 nH
C16
33 nF
50 Ωµstrip
J7
L
NA H OUT
VCC
C19
33 nF
50 Ωµstrip
J9
LNA L IN
L16
1.5 nH
L9
47 nH
C20
33 nF
L10
11 nH
VCC
C21
1.8 pF
C22
DNI
50 Ωµstrip
J10
LNA L OUT
F2
25
1
4
3
6
GNDGND
GNDGND
IN OUT
R10
22 kΩ
R9
5.1 kΩ
L11
47 nH
C23
33 nF
C24
DNI
C25
33 nF
50 Ωµstrip
J11
MIX L IN
IF SEL
C29
33 nF
C28
33 nF
IP SET
C27
33 nF
BAND SEL
C26
33 nF
VCC
R4
10 kΩ
L3
220 nH
C5
15 pF
L4
220 nH
R5
0 Ω
C6
9pF
R6
DNI
50 Ωµstrip
J2
CDMA IF OUT
VCC
C4
15 pF
2489310Rev. 3
JCDMA/GPS
R1
10 kΩ
L2
220 nH
C3
15 pF
C1
15 pF
L1
220 nH
VCC
R2
0 Ω
C2
9pF
R3
DNI
50 Ωµstrip
J1
FM IF OUT
P1-1 /2 SELECT
P1-4 BAND SEL
P1-2 IF SEL
P1-3 IP SET
P1
1
2
3
4
CON4
P3
1
2
3
CON3
GND
GND
VCC
P3-1
C32
1 µF
+
P2
1
2
3
4
CON4
P2-1 ENABLE
P2-3 MIX GAIN
P2-4 LNA GAIN
P2-2
TX BUFF ENABLE
Page 14
Preliminary
8-46
RF2489
Rev A10 011017
8
FRONT-ENDS
Evaluation Board Layout
Board Size 3.100” x 2.958”
Page 15
Preliminary
8-47
RF2489
Rev A10 011017
8
FRONT-ENDS
Page 16
Preliminary
8-48
RF2489
Rev A10 011017
8
FRONT-ENDS
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