Vishay RFWaves
RFW322-M-PA
Document Number 81217
Rev. 1.0, 16-Nov-05
www.vishay.com
1
19581
For more information please contact: RFTransceivers@vishay.com
RFW322-M-PA Transceiver Module with Power Amplifier
DESCRIPTION
The RFW322-M-PA is a small PCB module which
includes the RFW322-M module, based on RFWaves*
RFW322 transceiver chipset, and a Power Amplifier
module. This module was created in order to provide a
solution for applications that have a need of longer
range than provided by the basic RFW322-M module.
The company’s products are covered by one or more
of the following:
Taiwan Patent No. 155994, Taiwan Patent No.
176767, USA Patent No. 6,535,545. Other patents
pending
The module consists of 2 main parts:
1 . R F W3 2 2- M mo d ul e - B a se d on V is h ay R FW a ve s
RFW322 transceiver chipset
2. Carrier board which includes:
• PA chip - A half-duplex RF power amplifier
module on chip with internal antenna
diversity support
•A 9 pin application header for main board
connection
• Tx/Rx switch
• 2 RF output ports
• RF SAW filter
* Vishay Advanced Technologies ltd. -
RFWaves division
(*) This power consumption is under 1 Mbps, 50 % ‘1’ and 50 % ‘0’
CHARACTERISTICS
PARAMETER VALUE
Basic transceiver RFW322-M, 3 mbps, DSSS.
Typical output power 25 dBm peak
Typical receive sensitivity - 73 dBm peak
Typical total link budget 98 dB
Typical current consumption in transmit (Tx) mode (*) 450 mA
Typical current consumption in receive (Rx) mode 35 mA
Average current consumption Depending on application (usually much lower than peak due to time
sharing between Tx, Rx and standby)
Typical standby current consumption < 100 uA
Antenna diversity Two antenna ports and an externally controlled switch, allowing the
application to decide which antenna is active (space diversity
implementation)
Antenna switch time Typical < 1 µsec
Antenna impedance 50 ohm unbalanced
Antenna mechanical interface Pads for soldering MMCX connectors or mechanical holes for direct
soldering of coaxial cable.
Note: no cable or connector is provided with the module.
Main board interface 9 pin, 2 mm pitch, 1.2 mm diameter.
Module dimensions (without antenna) 45 x 21 mm
Carrier PCB thickness 0.6 mm
Total module thickness 5 mm
www.vishay.com
2
Document Number 81217
Rev. 1.0, 16-Nov-05
Vishay RFWaves
RFW322-M-PA
For more information please contact: RFTransceivers@vishay.com
BLOCK DIAGRAM:
The following table describes the pinout of the RFW322-M-PA Module. The module has a 9-pin interface towards
the main board. See drawing at 'mechanical dimensions' section to identify pin 1 and antenna ports.
PINOUT
PIN NAME FUNCTIONALITY
1 RF Tx/Rx Transmit receive control.
High = Tx; Low = Rx
Note: RF Tx/Rx controls also the PA state. For low current standby mode this control
should be pulled Low.
2 RSSI RF RSSI indication
Max source and sinc current = 50 nA
3 Data I/O RF Input / Output data.
4 RF ACT RF Activate module control.
High = Active; Low = Non active
5 GND Ground signal
6 VCC Feed Input voltage, 3 - 3.6 V; peak current 200 mA.
Recommended 3.4 V for optimal performance.
Note: Voltage should be regulated - recommended that ripple in peak current will not
exceed 50 mV peak/peak.
7 NC Not connected
8 NC Not connected
9 Ant SW RF switch control
Ant SW TX Rx
High ≥ VCC - 0.6 V Antenna port 1 Antenna port 2
Low ≤ 0.6 V Antenna port 2 Antenna port 1
Note: For low current standby mode this control should be pulled Low.
Antenna port 1
Antenna port 2
RFW 322-M
VCC
GND
RF ACT
RF Data I/O
RF Tx/Rx
ANT SW
RF - TX
9 pin header
RSSI
Power Amplifier
Saw
Filter
RF- RX
TXRX
Switch
Carrier PCB
Logic
Antenna port 1
19815
Document Number 81217
Rev. 1.0, 16-Nov-05
www.vishay.com
3
Vishay RFWaves
RFW322-M-PA
For more information please contact: RFTransceivers@vishay.com
DESIGN CONSIDERATIONS
RFW322-M-PA carrier board has been designed espe-
cially in order to accommodate the RFW322-M Module
and the PA module, and provide optimal RF perfor-
mance and minimal size. The layout has been careful-
ly designed in order to prevent oscillation and RF
leakage phenomena.
When connecting this Module to the main board, it is
recommended to follow these guidelines:
1. When connecting the antenna/s using a coaxial
cable, make sure the cable has 50 ohm impedance
with low loss at 2.44 GHz (loss < 2 dB/m). In addi-
tion, the soldering quality is critical for optimal
power transmission. Make sure the cable ground is
well soldered in at least two points. Also, make sure
that the coaxial cable exposure length is lower than
3 mm.
2. The antenna/s should be placed in a distance of at
least 3 cm from the module.
3.
The antenna should be tuned to 50 ohm at 2.44 GHz.
4. For antenna diversity implementation, the optimal
distance between the two antennas depends on
the antenna type and orientation.
5. DC system should be able to support high current
bursts of up to 450 mA for switched TX mode. The
VCC and ground should remain stable (ripple
< 50 mV) or else the module sensitivity can be
reduced, and interference can be caused to the
rest of the system. It is advised to use a separate
regulator for the RF section connected directly to
the voltage source and ground, and to avoid using
the same voltage supply and ground connection
that is used by the rest of the system.
6. Shielding - the module is designed to support a
metal shield can. The can is not provided with the
module.
MECHANICAL DIMENSIONS in millimeters
*Note: pins are numbered 1 - 9. Please refer to the pin out table on page 2 for pin description.
NOTICE
Specifications of the products displayed herein are
subject to change without notice. Vishay Intertechnol-
ogy, Inc., or anyone one its behalf, assumes no
responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a
product description only. No license, express or
implied, by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as
provided in Vishay’s terms and conditions of sale for
such products, Vishay assumes no liability whatso-
ever, and disclaims any express or implied warranty,
relating to sale and/or use of Vishay products including
liability or warranties relating to fitness for a particular
purpose, merchantability, or infringement of any
patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in
medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in
such applications do so at their own risk and agree to
fully indemnify Vishay for any damages resulting from
such improper use or sale.
Footprint
39.1
39.1
20.7 10.3
7.5
7.5
1.6
1.4
0.5
2.4
RFW322 - M
2.0
5.8
6.6
2.1
0.5
2.4
0.50
2.4
1
2
3
4
5
6
7
8
9
1.30
3.50
1.0
0.6
0.6
44.4
Antenna
Port Pad
Antenna
Port Hole
1.4
1.2
Interface
pin hole
1.5
0.3
5.3
2.7
12.9
5.9
8.2
19816
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
