RFFM4201SR datasheet, PDF - EEWORLD Datasheet

RFFM4201SR: Description3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE; File Size1MB，14 Pages; ManufacturerRF Micro Devices (Qorvo)

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RFFM4201SR Overview

3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE

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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

Vreg1 7

Vreg2 6

Vreg3 5

Pdet 4

GND 3

Vrx

GND

ANT

Features



Pdown

Bias



34dB Typical Gain Across

Frequency Band

OUT

= 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

WiFi IEEE802.11b/g/n

Applications

Customer Premises

Equipment (CPE)

Spread-Spectrum and MMDS

Systems

GND

Input

Match

Inter

Stage

Match

Inter

Stage

Match

GND

TXIN

13 Vbias

GND

Vtx

GND

14 Vcc1

15 GND

16 Vcc2

17 Vcc3

18 GND

GND

Applications



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.



Ordering Information

RFFM4201PCK-410

RFFM4201SB

RFFM4201SR

RFFM4201TR7

RFFM4201SQ

RFFM4201 Eval Board and 5-Piece Bag

5-Piece Bag

100-Piece Reel

2500-Piece Reel

25-Piece Bag

Optimum Technology Matching® Applied



DS121008

GaAs HBT

GaAs MESFET

InGaP HBT

SiGe BiCMOS

Si BiCMOS

SiGe HBT



GaAs pHEMT

Si CMOS

Si BJT

GaN HEMT

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 customerservice@rfmd.com.

1 of 14

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 V

traces. To simplify bias conditions, the RFFM4201 requires a

single positive supply voltage (V

), a positive current control bias (V

REG

) 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 V

to 5.0V first with V

REG

= 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 V

REG

to 2.9V (typ.).

On V

REG

(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 P

DOWN

to 2.9V (typ.). PDOWN pin can be tied to V

REG

supply.

NOTE: It is important to adjust the V

voltage source so that +5V is measured at the board; and the +2.9V of V

REG

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 P

DOWN

, V

REG

and V

• 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 customerservice@rfmd.com.

5 of 14

RFFM4201SR Related Products

	RFFM4201SR	RFFM4201PCK-410	RFFM4201SB	RFFM4201SQ	RFFM4201TR7
Description	3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE	3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE	3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE	3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE	3.3V TO 5V, 2.4GHz TO 2.5GHz HIGH POWER FRONT END MODULE

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