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PDF RFFM4202 Data sheet ( Hoja de datos )
| Número de pieza | RFFM4202 | |
| Descripción | 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE | |
| Fabricantes | RFMD | |
| Logotipo |  |
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RFFM4202
5.0V, 2.4 GHz
TO 2.5 GHz
HIGH POWER
FRONT END
MODULE
RFFM4202
5.0V, 2.4GHz TO 2.5GHz HIGH POWER
FRONT END MODULE
Package: 6mm x 6mm Laminate
Features
34dB Typical Gain Across
Frequency Band
POUT = 27.5dBm <2.5%
Dynamic EVM
High Impedance Power
Control
1 x1 MIMO architecture
Integrated 3-stage PA,
filtering, and T/R switch
Integrated Power Detector
Applications
WiFi IEEE802.11b/g/n
Applications
Customer Premises
Equipment (CPE)
Spread-Spectrum and MMDS
Systems
7 6543
Pdown 8
GND 9
TXIN 10
Input
Match
GND 11
GND 12
Bias
Inter
Stage
Match
Inter
Stage
Match
21
24 GND
23 ANT
22 GND
21 GND
20 Vtx
13
14 15 16
17 18
19 GND
Functional Block Diagram
Product Description
RFFM4202 is a 1 x 1 MIMO module that is intently specified to address IEEE
802.11b/g/n WiFi 2.4GHz to 2.5GHz customer premises equipment (CPE) applica-
tions. The module has an integrated three-stage linear power amplifier, Tx harmonic
filtering and SPDT switch. The RFFM4202 has fully matched input and output for a
50 system and incorporates matching networks optimized for linear output power
and efficiency. The RFFM4202 is housed in a 6mm x 6mm laminate.
Ordering Information
RFFM4202SB
RFFM4202SQ
RFFM4202SR
RFFM4202TR7
RFFM4202PCK-410
5 Piece Bag
25 Piece Bag
100 Piece Reel
2500 Piece reel
RFFM4202 Evaluation Board and 5 Piece Bag
DS120427
Optimum Technology Matching® Applied
GaAs HBT
SiGe BiCMOS
GaAs pHEMT
GaN HEMT
GaAs MESFET
InGaP HBT
Si BiCMOS
SiGe HBT
Si CMOS
Si BJT
BiFET HBT
LDMOS
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
1 of 15
Free Datasheet http://www.Datasheet4U.com
1 page  
RFFM4202
Theory of Operation and Applications
Overview
The RFFM4202 is a single-chip integrated front end module (FEM) for high performance WiFi applications in the 2.4GHz to
2.5GHz ISM band. The FEM greatly reduces the number of external components minimizing footprint and assembly cost of the
overall 802.11b/g/n solution. The RFFM4202 has an integrated b/g/n power amplifier, a power Detector, and Tx filtering and
a Switch, which is capable of switching between WiFi Rx and WiFi Tx operations. The device is manufactured using InGaP HBT
and pHEMT processes on a 6mmx6mmx0.95mm Laminate package. The module meets or exceeds the RF front end needs of
the 802.11b/g/n WiFi RF systems. As the RFFM4202 is fully RF matched to 50 internally and requires minimal external com-
ponents, it is very easy to implement on to PCB designs. To reduce the design and optimization process on the customer appli-
cation, the evaluation board layout should be copied as close as possible, in particular the ground and via configurations.
Gerber files of RFMD PCBA designs can be provided upon request. The supply voltage lines should present an RF short to the
FEM by using bypass capacitors on the VCC traces. To simplify bias conditions, the RFFM4202 requires a single positive supply
voltage (VCC), a positive current control bias (VREG) supply or high impedance enable, and a positive supply for switch control.
The built-in Power Detector of the RFFM4202 can be used as power monitor in the system. All inputs and outputs are internally
matched to 50.
Transmit Path
The RFFM4202 has a typical gain of 35dB from 2.4GHz to 2.5GHz, and delivers>27dBm typical output power in 11n HT20
MCS7 and>27.5dBm typical in 11g 54Mbps with an EVM<3%. The RFFM4202 requires a single positive of 5.0V to operate at
full specifications. The VREG pin requires a regulated supply at 2.85V to maintain nominal bias current.
Out of Band Rejection
The RFFM4202 contains a low pass filter (LPF) to attenuate the 2nd Harmonics to -40dBm/MHz (typical). Depending upon the
end-user's application, additional filters may be needed to meet the out of band rejection requirements of the system. For the
system to meet FCC' s spec, a simple LC can be used between FEM and Antenna, for impedance matching and extra Harmon-
ics attenuation to meet spec.
Receive Path
The Rx path has a 50 single-ended port. The Receive port return loss is 9.6dB minimum. In this mode, the FEM has an inser-
tion loss of 0.8dB and 30dB (typical) isolation to Tx port.
RFFM4202 Biasing Instructions to the Eval board:
802.11b/g/n Transmit:
1. Connect the FEM to a signal generator at the input and a spectrum analyzer at the output. Set the Pin at signal generator is
at -20dBm.
2. Bias VCC to 5.0V first with VREG=0.0V. If available, enable the current limiting function of the power supply to 1100mA.
3. Refer to switch operational truth table to set the control lines at the proper levels for WiFi Tx. It is recommended to maintain
at least 2.85V on VTx during Tx mode. A lower VTx voltage will enable the switch in Tx mode, but 2.85V is needed to ensure
that the switch stays in Tx mode during high power peaks. Using a VTx voltage less than 2.85V in Tx mode could result in
abnormal operation or device damage.
4. Turn on VREG to 2.85V (typ).
5. On VREG (of evaluation board), a regulated supply is recommended. Be extremely careful not to exceed 3.0V on the VREG pin
or the part may exceed device current limits.
6. Turn on PDOWN to 2.85V (typ). PDOWN pin can be tied to VREG supply. NOTE: It is important to adjust the VCC voltage source
so that +5V is measured at the board; and the +2.85V of VREG is measured at the board. The high collector currents will
drop the collector voltage significantly if long leads are used. Adjust the bias voltage to compensate.
7. Turn on RF of signal generator and gradually increase power level to the rated power. CAUTION: If the input signal exceeds
the maximum rated power, the RFFM4202 Evaluation Board can be permanently damaged.
8. To turn off FEM, turn off RF power of signal generator; then PDOWN, VREG and VCC.
802.11b/g/n Receive
• To receive WiFi set the switch control lines per the truth table.
DS120427
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 15
Free Datasheet http://www.Datasheet4U.com
5 Page 
RFFM4202
Evaluation Board Bill of Materials (BOM)
Description
Qty Reference
Designator
Manufacturer
CAP, 1000pF, 10% 50V, X7R,0402
1 C1 MURATA ELECTRONICS
CAP, 1F, 10%, 10V, X5R, 0603
1 C4 MURATA ELECTRONICS
CAP, 10F, 10%, 10V, X5R, 0805
1 C3 MURATA ELECTRONICS
CONN, SMA, END LAUNCH, UNIV, HYB MNT, FLT
3
J1, J2, J3
MOLEX
RES, 20KW0402
1 R1 PANASONIC INDUSTRIAL CO
RES, 0, 0402
3 R2, R4, R5
KAMAYA, INC
DNI 2 R3, C2
RFFM4202
1 U1
RFMD
Manufacturer’s P/N
GRM155R71H102KA01D
GRM188R61A105KA61D
RM21BR61A106KE19L
SD-73251-4000
ERJ-2GE-J203
RMC1/16SJPTH
RFFM4202
DS120427
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
11 of 15
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet RFFM4202.PDF ] | |
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