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PDF RF2489 Data sheet ( Hoja de datos )
| Número de pieza | RF2489 | |
| Descripción | DUAL-BAND/TRI-MODE CDMA LOW NOISE AMPLIFIER/MIXER | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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Preliminary
8
Typical Applications
• CDMA/Cellular/PCS Handsets
• JCDMA/GPS Handsets
• CDMA Modem/Data Cards
RF2489
DUAL-BAND/TRI-MODE CDMA
LOW NOISE AMPLIFIER/MIXER
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
Product Description
The RF2489 is a high performance CDMA dual-band/tri-
mode integrated LNA/mixer. The device is designed to
meet all IS-98 sensitivity, intermodulation and single-tone
requirements. The operating voltage is 2.7V and is com-
patible with 1.8V logic for control lines. The RF2489 inte-
grates 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 inte-
grated. The design is flexible, in that the bias currents
may be set using off-chip current reference resistors for
both the LNA and mixer blocks. The device is packaged in
a 5mmx5mm leadless plastic package.
Optimum Technology Matching® Applied
Si BJT
Si Bi-CMOS
GaAs HBT
üSiGe HBT
GaAs MESFET
Si CMOS
32 31 30 29 28 27 26 25
FM+ 1
24 CELL LNA OUT
FM- 2
23 CELL LNA EMITTER
CDMA+ 3
22 CELL LNA IN
CDMA- 4
/2 SELECT 5
/2
21 GND
20 PCS LNA IN
LO IN 6
19 GND
PCS LO OUT 7
18 VCC2
CELL LO OUT 8
9
17 PCS LNA OUT
10 11 12 13 14 15 16
Functional Block Diagram
1.00
0.85
0.80
0.65
0.60
0.24 typ
3
0.30
0.18
5.00
sq.
0.23
0.13
4 PLCS
3.25
2.95 sq.
12°
MAX
0.55
0.30
0.05
0.01
0.50
0.45
0.20
4 PLCS
NOTES:
1 Shaded Pin is Lead 1.
2 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 Dimension applies to plated terminal: to be measured between 0.02 mm
and 0.25 mm from terminal end.
4 Package Warpage: 0.05 mm max.
5 Die Thickness Allowable: 0.305 mm max.
Package Style: LCC, 32-Pin, 5x5
Features
• 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
Ordering Information
RF2489
RF2489
RF2489 PCBA
Dual-Band/Tri-Mode CDMA Low Noise Amplifier/Mixer
Dual-Band/Tri-Mode JCDMA/GPS Low Noise
Amplifier/Mixer
Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
8
Rev A10 011017
8-33
1 page  
Preliminary
Parameter
Local Oscillator Input
Cellular - CDMA/FM
Input Power
Input Frequency
Cellular - JCDMA
Input Power
Input Frequency
PCS
Input Power
Input Frequency
GPS
Input Power
Input Frequency
TX (Local Oscillator)
Buffer
Cellular - CDMA/FM
Output Power
Output Frequency
Current Consumption
Cellular - JCDMA
Output Power
Output Frequency
Current Consumption
PCS
Output Power
Output Frequency
Current Consumption
RF2489
Specification
Min.
Typ.
Max.
Unit
Condition
-10 -4
685 - 710
1053 - 1078
1370 - 1420
2106 - 2156
-10 -4
722 - 760
942 - 980
1444 - 1520
1884 - 1960
-10 -4
1746 - 1806
2114 - 2174
-10 -4
1465.42
1685.42
0
0
0
0
dBm
MHz
MHz
MHz
MHz
dBm
MHz
MHz
MHz
MHz
dBm
MHz
MHz
dBm
MHz
MHz
IF = 184 MHz
IF = 184 MHz
IF=184MHz with /2 SELECT=1
IF=184MHz with /2 SELECT=1
IF = 110 MHz
IF = 110 MHz
IF=110MHz with /2 SELECT=1
IF=110MHz with /2 SELECT=1
IF = 184 MHz
IF = 184 MHz
IF = 110 MHz
IF = 110 MHz
-10 -8
685 - 710
1053 - 1078
1370 - 1420
2106 - 2156
-10 -8
722 - 760
942 - 980
1444 - 1520
1884 - 1960
-10 -8
1746 - 1806
2114 - 2174
2
2
2
dBm
MHz
MHz
MHz
MHz
mA
dBm
MHz
MHz
MHz
MHz
mA
dBm
MHz
MHz
mA
Single-ended 50Ω load, /2 SELECT=1
IF = 184 MHz
IF = 184 MHz
IF=184MHz with /2 SELECT=1
IF=184MHz with /2 SELECT=1
Single-ended 50Ω load, /2 SELECT=1
IF = 110 MHz
IF = 110 MHz
IF=110MHz with /2 SELECT=1
IF=110MHz with /2 SELECT=1
Single-ended 50Ω load
IF = 184 MHz
IF = 184 MHz
8
Rev A10 011017
8-37
5 Page 
Preliminary
RF2489
VCC
BAND SEL
IP SET
IF SEL
VCC
FM IF OUT
VCC
CDMA
IF OUT
/2 SELECT
LO IN
HB LO OUT
LB LO OUT
VCC
TX BUFF ENABLE
BUF ENABLE
Application Schematic
C2
DNI
C2
DNI
68 Ω
2 nH
2 nH
L2 C1
0Ω
L1
C1
R
C1
L2
0Ω
L1 R
C1
33 nF
DNI
47 nH
33 nF
20 kΩ
5.1 kΩ
32 31 30 29 28 27 26 25
1 24
VCC
8.7 nH
F2
6 GND GND 4
3 GND GND 1
DNI
2
3
4
/2
5
6
23
1.5 nH
22
47 nH
33 nF
21 33 nF
33 nF
20
1 pF
19 7.5 nH
7 18
8
9
17
10 11 12 13 14 15 16
7.5 nH
15 nH 0 Ω 0.5 pF
1 nH
DNI
47 nH
33 nF
F1
DNI
5 OUT
IN 2
LNA L IN
LNA H IN
VCC
LNA GAIN
MIX GAIN
8
Output Interface Network
L1, C1, and R form a current combiner which per-
forms 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:
fIF =
2π
1
L21(C1 + CEQ)
Where CEQ is the equivalent stray capacitance and
capacitance looking into pins 1 and 2. An average
value to use for CEQ is 2.5pF to 3pF.
R can then be used to set the output impedance
according to the following equation:
( )R =
4
1
ROUT
-
1
RP
-1
where ROUT is the desired output impedance and RP
is the parasitic equivalent parallel resistance of L1.
C1 should be chosen as high as possible (not greater
than 22pF), while maintaining an RP of L1 that allows
for the desired ROUT.
L2 and C2 serve dual purposes. L2 serves as an out-
put 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.
Rev A10 011017
8-43
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet RF2489.PDF ] | |
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