RX3G-869.85-64 [RADIOMETRIX]

UHF FM Data Transmitter Module;


型号：	RX3G-869.85-64
厂家：	RADIOMETRIX LTD
描述：	UHF FM Data Transmitter Module
文件：	总7页 (文件大小：242K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Radiometrix

Hartcran House, 231 Kenton Lane, Harrow, HA3 8RP, England

Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233

Issue 1, 20 May 2009

TX2S/TX3S

UHF FM Data Transmitter Module

The TX2S module is a miniature

PCB mounting UHF radio

transmitter which enable the simple

implementation of a data link at up

to 40 kbps at distances up to 75

metres in-building and 300 metres

open ground.

Figure 1: TX2S-433-40-3V-SM

Features

ꢀ

Conforms to ETSI EN 300 220-3 (radio) and EN 301 489-3 (EMC) standards

Data rates up to 40 kbps

Usable range up to 300 m

Versions available on 433.92MHz, 434.42MHz and 869.85 (TX3S)

Small size: 20x10x2mm (without can), 20x10x2.6mm(with can)

Available for operation at 433.92MHz, 434.42MHz and 869.85MHz in Europe including the UK, both

modules combine full internal filtering to ensure EMC compliance by minimising spurious radiations and

susceptibilities. The TX2S/TX3S module will suit one-to-one and multi-node wireless links in applications

including car and building security, EPOS and inventory tracking, remote industrial process monitoring

and computer networking. Because of it’s small size and low power requirements, it is ideal for use in

portable, battery-powered wireless devices such as remote control key fob.

Technical Summary

ꢀ

Crystal-locked PLL, FM modulated at up to 40kbps

Operation from 2.2V to 4V

Up to +4dBm (+10dBm variant on 433.92MHz)

Improved frequency and deviation accuracy

Harmonics @ <1GHz, -54dBm

Applications

•

Remote control key fobs

EPOS and inventory tracking

Industrial telemetry and telecommand

Data loggers

In-building environmental monitoring and control

Car and building security and fire alarms

Vehicle data up/download

Evaluation Platform: Universal Evaluation kit +TX2S carrier

Matching Receiver: RX2G-xxx-15 or RX2G-xxx-64

Radiometrix Ltd, TX2S/TX3S Data Sheet

page 1

Functional description

The TX2S transmitter module is a crystal based PLL controlled FM transmitter operating between 2.2V

and 4V and is available on European licence exempt UHF frequencies. The TX2S module is type approved

to EN 300 220-3 for European use and delivers nominally +0dBm at 7mA. The module measures 20 x 10 x

2 mm.

VCC 2.2 -- 4V

433.92 MHz

band pass

filter

ref

osc

35kHz

LPF

buffer

V C O

RF out

TXD

Loop

Filter

RF gnd

Fig. 2: TX2S block diagram

Fig. 3: TX2S pinout

Fig 4: physical dimensions

Radiometrix Ltd, TX2S/TX3S Data Sheet

page 2

Pin description:

RF GROUND (pins 2)

RF ground, internally connected to the module screen and pin 3 (0V). These pins should be directly

connected to the RF return path - e.g. coax braid, main PCB ground plane etc.

RF OUT

(pin 1)

50Ω RF output to the antenna. Internally DC-isolated. See antenna section of apps notes for details of

suitable antennas.

VCC

(pin 5)

+2.2V to +4V DC supply. Max ripple content 0.1V_P-P

GROUND

(pin 3)

DC supply ground. Internally connected to pins 2 & 3.

DATA (pin 4)

DC-coupled modulation input. Accepts serial digital data at 0V to 4V levels.

Absolute maximum ratings

Survival Maximums:

Exceeding the values given below may cause permanent damage to the module.

Operating temperature-

Storage temperature

-20°C to +70°C

-40°C to +100°C

TX2S, all variants

Vcc (pin 5)

-0.3V to +4.0V

Data input (pin 4)

-0.3V to +4.0V

RF out (pin 1)

±50V DC 10dBm RF

Performance Specifications: TX2S transmitter.

(Temperature = 20C unless stated)

pin min.

typ.

max. units

notes

DC LEVELS

supply voltage

2.2

3.0

4.0

CURRENT & RF POWER

TX2S-433-40-3V

Supply current @ Vcc = 3V

dBm

RF power

@ Vcc = 3V

harmonics @ < 1GHz

harmonics @ > 1GHz

initial frequency accuracy

overall frequency accuracy

-60

-40

+/-10

-54

-30

+20

+25

dBm

kHz

-20

-25

FM deviation (+/-)

Modulation bandwidth @ -3dB

kHz

modulation distortion (THD)

power up time to full RF

1.5

Note: 1. Measured into a 50Ω load.

Radiometrix Ltd, TX2S/TX3S Data Sheet

page 3

Power supply requirement

The ripple/noise on the supply rail should be below 10mVp-p to avoid problems. If the quality of the supply

is in doubt, it is recommended that a 10µF low-ESR tantalum or similar capacitor be added between the

module supply pin (Vcc) and ground, together with a 10Ω series feed resistor between the Vcc pin and the

supply rail.

The TX2S incorporates a low voltage shutoff circuit, which prevents any possibility of erratic operation by

disabling the RF output if the supply voltage drops below 2.2V (±5%). This feature is self-resetting, i.e.

restoring the supply to greater than 2.2V will immediately restore full RF output from the module.

TX2S modulation requirements

The module will produce the specified FM deviation with a TXD input to pin 4 of 2 to 4V amplitude, i.e. 0V

"low", 4V "high. Where standard 2-level digital data is employed with a logic "low" level of 0V ±0.2V, the

logic "high" level applied to TXD may be any value between +2V and +4V for correct operation.

Module mounting considerations

Good RF layout practice should be observed – in particular, any ground return required by the antenna or

feed should be connected directly to the RF GND pin at the antenna end of the module, and not to the 0V

pin which is intended as a DC ground only. All connecting tracks should be kept as short as possible to

avoid any problems with stray RF pickup.

If the connection between module and antenna does not form part of the antenna itself, it should be made

using 50Ω microstrip line or coax or a combination of both. It is desirable (but not essential) to fill all

unused PCB area around the module with ground plane.

Warning: DO NOT wash the module. It is not hermetically sealed.

Radiometrix Ltd, TX2S/TX3S Data Sheet

page 4

Antenna requirements

Three types of integral antenna are recommended and approved for use with the module:

0.5 mm enameled copper wire

close wound on 3.2 mm diameter former

433 MHz = 24 turns

A. Helical antenna

Feed point 15% to 25% of total loop length

track width = 1mm

RF-GND

4 to 10 cm²inside area

B. Loop antenna

16.4cm

wire, rod, PCB-track or a combination

of these three

433 MHz = 16.4 cm total from RF pin.

C. Whip antenna

Fig.5: Antenna

helical

***

loop

whip

***

Ultimate performance

Easy of design set-up

Size

Immunity proximity effects

Range open ground to similar antenna

(for TX2S-433-40-3V & RX2G-433-15)

***

100m

200m

300m

Antenna selection chart

A) Helical

Wire coil, connected directly to pin 2, open circuit at other end. This antenna

very

efficient given it's small size (20mm x 4mm dia.). The helical is a high Q antenna, trim the

wire length or expand the coil for optimum results. The helical de-tunes badly with

proximity to other conductive objects.

B) Loop

C) Whip

A loop of PCB track tuned by a fixed or variable capacitor to ground at the 'hot' end and fed

from pin 2 at a point 20% from the ground end. Loops have high immunity to proximity de-

tuning.

This is a wire, rod, PCB track or combination connected directly to pin 2 of the module.

Optimum total length is 15.5cm (1/4 wave @ 433MHz). Keep the open circuit (hot) end well

away from metal components to prevent serious de-tuning. Whips are ground plane

sensitive and will benefit from internal 1/4 wave earthed radial(s) if the product is small

and plastic cased

The antenna choice and position directly controls the system range. Keep it clear of other metal in the

system, particularly the 'hot' end. The best position by far, is sticking out the top of the product. This is

often not desirable for practical/ergonomic reasons thus a compromise may need to be reached. If an

internal antenna must be used try to keep it away from other metal components, particularly large ones

like transformers, batteries and PCB tracks/earth plane. The space around the antenna is as important as

the antenna itself

Radiometrix Ltd, TX2S/TX3S Data Sheet

page 5

Duty Cycle requirements

The duty cycle is defined as the ratio, expressed as a percentage, of the maximum transmitter “on” time on

one or more carrier frequencies, relative to a one hour period. Where an acknowledgement message is

required, the additional transmitter “on” time shall be included.

There is a 10% duty cycle restriction on 433.050-434.790 MHz band in most of the EU member states.

The TX2S-433 is an RF module intended to be incorporated into a wide variety of applications and

finished products, Radiometrix has no control over the end use of the TX2S-433.The harmonised band

433.050 to 434.790 MHz as detailed in Annex 1 Band E of CEPT/ERC Recommendation 70-03 (which can

be downloaded at http://www.ero.dk/scripts/docmanag98/dm.dll/QueryDoc?Cat=Recommendation)

has list of countries where Duty Cycle restriction apply.

Module users should, therefore, ensure that they comply with the stated Duty Cycle requirements of the

version of CEPT/ERC Recommendation 70-03 in place at the time of incorporation of the TX2S-433 into

their product. It should be noted that the stated Duty Cycle must not be exceeded otherwise any approval

granted for the TX2S-433 will be invalidated.

Variants and ordering information

The TX2S is manufactured in several variants depending on their operating frequency:

The standard frequency is 433.92MHz.

TX2S-433-40-3V

TX2S-434-40-3V

TX3S-869-40-3V

433.92MHz

434.42MHz

869.85MHz

The standard TX2S is supplied with mounting pins but without the metal shield. A version

without mounting pins, suitable for surface mount assembly, is also available. For other

variants, please contact sales department.

Matching receivers:

RX2G-433-15

RX2G-433-64

RX2A-433-10

RX2A-433-64

433.92MHz, 15kb/s

433.92MHz, 64kb/s

433.92MHz, 10kb/s

433.92MHz, 64kb/s

RX2G-434-15

RX2G-434-64

RX2A-434-10

RX2A-434-64

434.42MHz, 15kb/s

434.42MHz, 64kb/s

434.42MHz, 10kb/s

434.42MHz, 64kb/s

RX3G-869.85-15

RX3G-869.85-64

RX3A-869.85-10

RX3A-869.85-64

869.85MHz, 15kb/s

869.85MHz, 64kb/s

869.85MHz, 10kb/s

869.85MHz, 64kb/s

Evaluation Platform: Universal Evaluation kit +TX2S carrier

Radiometrix Ltd, TX2S/TX3S Data Sheet

page 6

Radiometrix Ltd

Hartcran House

231 Kenton Lane

Harrow, Middlesex

HA3 8RP

ENGLAND

Tel: +44 (0) 20 8909 9595

Fax: +44 (0) 20 8909 2233

sales@radiometrix.com

www.radiometrix.com

This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in whole or

in part must give clear acknowledgement to the copyright owner.

Limitation of liability

The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd reserves the

right to make changes or improvements in the design, specification or manufacture of its subassembly products

without notice. Radiometrix Ltd does not assume any liability arising from the application or use of any product or

circuit described herein, nor for any infringements of patents or other rights of third parties which may result from

the use of its products. This data sheet neither states nor implies warranty of any kind, including fitness for any

particular application. These radio devices may be subject to radio interference and may not function as intended if

interference is present. We do NOT recommend their use for life critical applications.

The Intrastat commodity code for all our wireless radio modules is: 8542 6000

R&TTE Directive

After 7 April 2001 the manufacturer can only place finished product on the market under the provisions of the

R&TTE Directive. Equipment within the scope of the R&TTE Directive may demonstrate compliance to the

essential requirements specified in Article 3 of the Directive, as appropriate to the particular equipment.

Further details are available on The Office of Communications (Ofcom) web site:

http://www.ofcom.org.uk/radiocomms/ifi/

Information Requests

Ofcom

European Radiocommunications Office (ERO)

Peblingehus

Riverside House

Nansensgade 19

2a Southwark Bridge Road

London SE1 9HA

Tel: +44 (0)845 456 3000 or 020 7981 3040

Fax: +44 (0)20 7783 4033

information.requests@ofcom.org.uk

DK 1366 Copenhagen

Tel. +45 33896300

Fax +45 33896330

ero@ero.dk

www.ero.dk

RX3G-869.85-64 [RADIOMETRIX]

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