RFW122-M-PA中文资料

Vishay RFWaves

RFW122-M-PA ISM

Document Number https://www.wendangku.net/doc/da1748956.html,

19581

For more information please contact: RFTransceivers@https://www.wendangku.net/doc/da1748956.html,

RFW122-M-PA ISM Transceiver Module with Power Amplifier

DESCRIPTION

The RFW122-M-PA is a small PCB module which includes the RFW122-M module, besed on Vishay RFWaves* RFW122 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 RFW122-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.RFW122-M module - Based on Vishay RFWaves RFW122 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. - Vishay RFWaves division

(*) This power consumption is under 1 Mbps, 50 % ‘1’ and 50 % ‘0’CHARACTERISTICS

Parameter

Value

Basic transceiver RFW122-M, 1 mbps, DSSS.T ypical output power

25 dBm peak T ypical receive sensitivity - 73 dBm peak T ypical total link budget

97 db T ypical current consumption in transmit (Tx) mode (*)210 mA T ypical current consumption in receive (Rx) mode 35 mA

Averange current consumption Depending on application (usually much lower than peak due to time sharing between Tx, Rx and standby)

T ypical 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 μs

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 T otal module thickness

5 mm

https://www.wendangku.net/doc/da1748956.html, Document Number 84776

Vishay RFWaves

RFW122-M-PA ISM

For more information please contact: RFTransceivers@https://www.wendangku.net/doc/da1748956.html,

BLOCK DIAGRAM:

The following table describes the pin out of the RFW122-M-PA. The module has a 9-pin interface towards the main board. See drawing at ‘mechanical dimensions’ section to identify pin 1 and antenna ports.

L

PINOUT

1

RF Tx/Rx

Transmit receive control. High = Tx; Low = Rx See RFW122-M datasheet for more details.

Note : RF Tx/Rx controls also the PA state. For low current standby mode this control should be pulled Low.

2RSSI

RF RSSI indication

See RFW122-M datasheet for more details.Max source and sinc current = 50 nA 3Data I/O RF Input / Output data.

See RFW122-M datasheet for more details.4

RF ACT

RF Activate module control.High = Active; Low = Non active

See RFW122-M datasheet for more details.5GND Ground signal

6

VCC3

Feed Input voltage, 3 to 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.7NC Not connected 8NC Not connected

9

Ant SW

RF switch control Ant SW TX Rx High ≥ VCC - 0.6 V Antenna port 1Antenna port 2Low ≤ 0.6 V Antenna port 2 Antenna port 1

Note: For low current standby mode this control should be pulled Low.

Document Number https://www.wendangku.net/doc/da1748956.html,

Vishay RFWaves

RFW122-M-PA ISM

For more information please contact: RFTransceivers@https://www.wendangku.net/doc/da1748956.html,

DESIGN CONSIDERATIONS

RFW122-M-PA carrier board has been designed especially in order to accommodate the RFW122-M Module and the PA module, and provide optimal RF performance and minimal size. The layout has been carefully designed in order to prevent oscillaltion 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 Ω impedance with low loss at

2.44 GHz (loss < 2 db/m). In addition, 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 least 3 cm from the module.

3.The antenna should be tuned to 50 Ω 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 250 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.

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Vishay Document Number: https://www.wendangku.net/doc/da1748956.html,

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.