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PDF RFFM4201 Data sheet ( Hoja de datos )
| Número de pieza | RFFM4201 | |
| Descripción | 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE | |
| Fabricantes | RFMD | |
| Logotipo |  |
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RFFM4201
3.3V to 5V,
2.4GHz TO
2.5GHz HIGH
POWER FRONT
END MODULE
RFFM4201
3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER
FRONT END MODULE
Package: 6mm x 6mm Laminate
Features
34dB Typical Gain Across
Frequency Band
POUT = 25dBm <2.5%
Dynamic EVM
2.4GHz to 2.5GHz Frequency
Range
Integrated Three-Stage PA,
Filtering and T/R switch
High Impedance Control
Integrated Power Detector
Applications
WiFi IEEE802.11b/g/n
Applications
Customer Premises
Equipment (CPE)
Spread-Spectrum and MMDS
Systems
Pdown
GND
TXIN
GND
Input
Match
GND
Bias
Inter
Stage
Match
Inter
Stage
Match
GND
ANT
GND
GND
Vtx
GND
Functional Block Diagram
Product Description
RFFM4201 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 RFFM4201 has fully matched input and output for a
50 system and incorporates matching networks optimized for linear output power
and efficiency. The RFFM4201 is housed in a 6mm x 6mm laminate.
DS121008
Ordering Information
RFFM4201PCK-410 RFFM4201 Eval Board and 5-Piece Bag
RFFM4201SB
5-Piece Bag
RFFM4201SR
100-Piece Reel
RFFM4201TR7
2500-Piece Reel
RFFM4201SQ
25-Piece Bag
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
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. ©2012, 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 14
Free Datasheet http://www.Datasheet4U.com
1 page  
RFFM4201
Theory of Operation and Applications
The RFFM4201 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 RFFM4201 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, WiFi Tx operations. The device is manufactured using InGaP HBT and
pHEMT processes on a 6mm x 6mm x 0.95mm laminate package. The module meets or exceeds the RF front end needs of the
802.11b/g/n WiFi RF systems. The RFFM4201 is a very easy part to implement. To reduce the design and optimization pro-
cess on the customer application, the evaluation board layout should be copied as close as possible, in particular the ground
and via configurations. Gerber files of RFMD PCBA designs will be provided upon request. The supply voltage lines should pres-
ent an RF short to the FEM by using bypass capacitors on the VCC traces. To simplify bias conditions, the RFFM4201 requires a
single positive supply voltage (VCC), a positive current control bias (VREG) supply, and a positive supply for switch control. The
built-in power detector of the RFFM4201 can be used as power monitor in the system. All inputs and outputs are internally
matched to 50.
Transmit Path
The RFFM4201 has a typical gain of 34dB form 2.4GHz to 2.5GHz, and delivers 25.5dBm typical output power in 11n HT20
MCS7 and 26dBm typical in 11g 54Mbps. The RFFM4201 requires a single positive of 5.0V to operate at full specifications.
The VREG pin requires a regulated supply at 2.9V to maintain nominal bias current.
Out of Band Rejection
The RFFM4201 contains a low pass filtering (LPF) to attenuate the 2nd Harmonics to -47dBm/MHz (typical), to meet the out of
band rejection requirements of the system for FCC specification.
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.
RFFM4201 Biasing Instructions to the Evaluation Board:
• 802.11b/g/n transmit:
• 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.
• Bias VCC to 5.0V first with VREG = 0.0V. If available, enable the current limiting function of the power supply to 750mA.
• Refer to switch operational truth table to set the control lines at the proper levels for WiFi Tx.
• Turn on VREG to 2.9V (typ.).
On VREG (of evaluation board), regulated supply is recommended. Be extremely careful not to exceed 3.0V on the VREG pin
or the part may exceed device current limits.
• Turn on PDOWN to 2.9V (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 +2.9V of VREG is mea-
sured at the board. The high collector currents will drop the collector voltage significantly if long leads are used. Adjust the
bias voltage to compensate.
• Turn on RF of signal generator and gradually increase power level to the rated power.
CAUTION: If the input signal exceeds the rated power, the RFFM4201 Evaluation Board can be permanently damaged.
• 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.
DS121008
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 14
Free Datasheet http://www.Datasheet4U.com
5 Page 
RFFM4201
WiFi 802.11n HT20 MCS7 Performance Plots in 100% Duty Cycle
EVM (%) versus POUT (dBm)
-40°C
VCC = 5VDC VREG = 2.9VDC
EVM (%) versus POUT (dBm)
25°C
VCC = 5VDC VREG = 2.9VDC
5.0
4.5 2412MHz
2450MHz
4.0
2484MHz
3.5
5.0
4.5 2412MHz
2450MHz
4.0
2484MHz
3.5
3.0 3.0
2.5 2.5
2.0 2.0
1.5 1.5
1.0 1.0
0.5 0.5
0.0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Output Power (dBm)
EVM (%) versus POUT (dBm)
85°C
VCC = 5VDC VREG = 2.9VDC
0.0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Output Power (dBm)
,&& $ YHUVXV 3287 G%P
&
9&& 9'& 95(* 9'&
5.0
4.5 2412MHz
2450MHz
4.0
2484MHz
3.5
3.0
0.80
0.70
0.60
0.50
2412MHz
2450MHz
2484MHz
2.5 0.40
2.0 0.30
1.5
0.20
1.0
0.5 0.10
0.0
0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 30.0
Output Power (dBm)
,&& $ YHUVXV 3287 G%P
&
9&& 9'& 95(* 9'&
0.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
2XWSXW 3RZHU G%P
,&& $ YHUVXV 3287 G%P
&
9&& 9'& 95(* 9'&
0.80
0.70
0.60
2412MHz
2450MHz
2484MHz
0.80
0.70
0.60
2412MHz
2450MHz
2484MHz
0.50
0.50
0.40
0.40
0.30
0.30
0.20
0.20
0.10
0.10
0.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
2XWSXW 3RZHU G%P
0.00
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
2XWSXW 3RZHU G%P
DS121008
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
11 of 14
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet RFFM4201.PDF ] | |
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