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PDF RFFM3482Q Data sheet ( Hoja de datos )
| Número de pieza | RFFM3482Q | |
| Descripción | Automotive WiFi FRONT END MODULE | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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RFFM3482Q
2.4GHz to 2.5GHz, Automotive WiFi
Front End Module
Package Style: QFN, 16-pin, 3mm x 3mm x 0.45mm
16 15 14 13
Features
Single Voltage Supply 3.3V to
4.2V
Integrated 2.5GHz b/g/n
Amplifier, Rx Balun and Tx/Rx
Switch and Directional Power
Detector
POUT = 17dBm, 11g, OFDM
at 2.4% EVM and POUT =
21.5dBm, Meeting 11b Mask
Applications
Automotive WiFi
Diagnostic
Data
Infotainment
TXB 1
12 BTH SW
GND 2
11 RX SW
BT 3
10 TX SW
PAEN 4
9 VB
5678
Functional Block Diagram
Product Description
The RFFM3842Q FEM is a single-chip integrated front end module (FEM)
for automotive WiFi. The FEM addresses the need for aggressive size
reduction for a typical 802.11b/g/n front end design and greatly reduces
the number of components outside of the core chipset. The front end
module has integrated b/g/n power amplifier, directional power detector,
Rx balun, and some Tx filtering. It is also capable of switching between
WiFi Rx, WiFi Tx and BTH RX/TX operations. The device is provided in a
3mm x 3mm x 0.45mm, 16-pin package. This module meets or exceeds
the RF front end needs of 802.11b/g/n WiFi RF systems.
Ordering Information
RFFM3482QTR13X Standard 1 piece
RFFM3482QSQ Standard 25 piece bag
RFFM3482QSR Standard 100 piece bag
RFFM3482QTR7 Standard 2500 piece reel
RFFM3482QPCK-41XFully Assembled Evaluation Board and 5 loose sample pieces
DS121108
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].
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1 page  
RFFM3482Q
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pkg
Base
Name
TXB
GND
BT
PAEN
VB
VB
PABC
PDET
VB
TX SW
RX SW
BTH SW
ANT
GND
RX+
RX-
GND
Pin Names and Descriptions
Description
RF input for the 802.11b/g/n PA. Input is matched to 50 and DC block is provided.
Ground.
RF bidirectional port for Bluetooth. Input is matched to 50 and DC block is provided.
Digital enable pin for the 802.11b/g/n PA. This is an active high control. An external bypass capacitor may be
needed on the PA EN line for decoupling purposes.
Supply voltage for the 802.11b/g/n PA.
Supply voltage for the 802.11b/g/n PA.
Linearity and Efficiency control pin, please see the Theory of Operation for more information.
Power detector voltage for Tx section. PDET voltage varies with output power. May need external decoupling
capacitor for module stability. May need external circuitry to bring output voltage to desired level.
Supply voltage for the 802.11b/g/n PA.
Switch control port. See switch truth table for proper level.
Switch control port. See switch truth table for proper level.
Switch control port. See switch truth table for proper level.
FEM connection to filter and antenna. Port is matched to 50 and DC block is provided.
Ground.
Receive port for 802.11b/g/n band. Internally matched to 100 differential. DC block provided.
Receive port for 802.11b/g/n band. Internally matched to 100 differential. DC block provided.
The center metal base of the QFN package provides DC and RF ground as well as heat sink for the front end
module.
DS121108
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 13
5 Page 
RFFM3482Q
RFFM3842Q Biasing Instructions:
• 802.11b/g/n Transmit (VB compliance = 5.5V, 400mA, PA EN compliance = 2V, ~450mA)
• Connect the FEM to a signal generator at the input and a spectrum analyzer at the output.
• Bias VB to 3.6V first with PA_EN = 0.0V
• Refer to switch operational truth table to set the control lines at the proper levels for WiFi Tx.
• Turn on PA_EN to 1.8V (typ.). Be extremely careful not to exceed 3.0V on the PA_EN pin, or the part may exceed device cur-
rent limits.
• Turn on PABC to 1.5mA (or 0.6V). For 11b operation Adjust PABC to 1.8mA. This controls the current drawn by the
802.11b/g/n power amplifier and the idle current should rise to ~115mA ± 20mA for a typical part, but it varies based on
the output power desired.
• 802.11 b/g/n Receive: to Receive WiFi set the switch control lines per the truth table below.
• Bluetooth Receive: to Receive Bluetooth set the switch control lines per the truth table below.
IBIAS Table
WiFi PABC
IEEE 802.11b
IEEE 802.11g
IEEE 802.11n
Standard Modulation
CCK
54OFDM
MCS7
1.8
1.5
1.6
Units
mA
mA
mA
DS121108
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
11 of 13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet RFFM3482Q.PDF ] | |
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